The Empire of Chance: How Probability Changed Science and Everyday Life [1 ed.] 9780521331159

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The Empire of Chance: How Probability Changed Science and Everyday Life [1 ed.]
 9780521331159

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  • With book review

Table of contents :
The Empire of Chance
Title Page
Contents
Acknowledgements
Introduction
1
2
3
4
5
6
7
8
References
Name Index
Subject Index
Review

Citation preview

The Empire of Chance

The Empire of Chance

I n t r o d u c t i o n

F o r t u n a ,

t h e

favorite

o f

learning, w a r n s s h e

fickle,

p h i l o s o p h y

B o e t h i u s '

that

o n l y

truthful,"

c e i v e d

w h e e l - t o t i n g

as

s e q u e n c e

o f

u p h e a v a l s

a n d

F o r t u n a

e v e n t

s c i e n c e

s c i e n c e

p h y s i o l o g y , sciences.

Paris

B e r n a r d

F o r t u n a

T h e

l a w s

o f

" t a m i n g

c h a n c e , "

in

statistics

h a d

b e g i n n i n g s t h e

t o

physics,

tical

( a n d

m a r c h

w a s

t o

p r o b a b i l i t y identity

w i t h

Scientia

a n d

t o

m a t t e r s

t h e o r y .

t h e o r y

n o t

P e r h a p s

has

h a d

its applications.

m a t h e m a t i c a l

t h e

e v o c a t i v e

phrase,

p r o b a b i l i t y

a

arch-rival

in

p r o b l e m s

s i m p l e

t h e

a n d

a n y

until

there

1 9 3 3

X l l l

(see

t h e

t h e

A t h e n s

at

o f

least

a n d

o n e

in

t h e

t h e o r y

t h e r e

B u t o f

part

i n t i m a c y

w a s

arguably

B y

p r o b a b i l i t y

a n d

F r o m

its

s p r e a d

j u r i s p r u d e n c e ,

o f

a n d

f r o m

statistics.

t o

i n n u m e r a b l e

o t h e r

3.6),

e m p i r e

n i n e t e e n t h ,

t w e n t i e t h .

r e l a t i o n s h i p

I n d e e d ,

f r o m

t h e

a n d

t o

a c c u m u l a t i o n

t h a n

D e s p i t e

F o r t u n a .

p r o b a b i l i t y

baseball,

m o r e

g r o w i n g t h e o r y

in

a n y

i n d e t e r m i n i s m

p r o b a b i l i t y

p s y c h o l o g y

practical)

allies.

is

c o n -

w i t h o u t

s h a r e d

a n d

a n d

c e n t u r y ,

P h i l o s o p h y

c h a n c e .

c h a n c e

h e r

a

m e d i e v a l

c h a n c e ,

a n d

t h e y

insurance,

testing,

m o t i o n

b e e n

c h a n g e a b l e ,

o f

B e r n a r d ,

t o

m e d i c a l

e x i s t e n c e

s e p a r a t i n g

g a m b l i n g a n d

a n d

illustrious

large

o f

D a m e

u n s t a b l e

n o t

n e v e r

t o u c h s t o n e

m i l l e n n i a

a

H a c k i n g ' s

f r o m

h a d

b a n i s h

w e r e

has

s o b e r

v e r y

causes,

r u l e d

i n f e r e n c e ,

e m p h a t i c a l l y

m a t h e m a t i c a l

t o

r e a l m

Ian

b i o l o g y ,

s o

a b o u t

already

c e n t u r y

p o l l i n g , n o t

C l a u d e

s o u g h t

t h e

t w o

m i d - s e v e n t e e n t h

i n d u c t i v e

a g r o n o m y ,

o f

t h e

e i g h t e e n t h

analysis,

w a s

r e c o n c i l e d

in

o f

that

r a n d o m

o v e r

faith: as

b y

in

article

e v e n

t h e

P h i l o s o p h y

t h e

I n

c h a n c e ,

h e r s e l f

D a m e

f r o m

Y e t

against

the

o f

Philosophy,

" s h o w s

p r o d u c e d

A r i s t o t l e o f

sciences. of

p r e a c h e s

causes."

in

t h e

Consolations

w h e n

"an

a n d

g o d d e s s

data

s o c i o l o g y , a n d

o n

o t h e r

this

t r i u m p h a l

until

b y

a

m a t h e m a t i c s ,

b o r d e r i n g n o

t o

p r a c -

applications o f

in

"pure" t h e

early

u p o n t h e o r y n i n e -

Introduction

XIV

t e e n t h (see

century,

1.5).

T h i s

F o r

as

b e c a m e deaths,

t o o l

v e r y

tainty

in

t h e

m i n d

W h e n

t h e

British

analysis

o f

e d u c a t i o n a l a n d

s o

It

in

t o

a

p e a s

in

fact

t h e

n o r m a l

bility o f

o r

moyen

in

e r r o r

s o c i o l o g y ,

c u r v e

r e p r e s e n t

c a m e

t o

intelligence p r e t a t i o n s c e n t u r y

q u o t i e n t s d e r i v e d

s u c h

b o o k

science

a n d

tistics

in

stock,

e u g e n i c s

a n d

o f cer-

2.2).

m e a s u r i n g

h e

h a s

o f

(see

o f

analysis

w e l l

t h e s e

l a u n c h e d

its

r o o t s

in

a g r o n o m y ,

agricultural

in B.

t h e

t h e

is

b e e n p r o f o u n d as o f

sciences. has

p r o b a b i l i t y

p i e c e m e a l .

e x p a n d e d alliance.

a n d

b y I n

A l s o ,

as

b o o k ,

m i n d ,

b e e n

d o m a i n

o f

c o n q u e s t w e

this

by,

v i e w

has

these

b e e n

O u r

t h e

sense: T h e

L.

A .

p r i m a r y a n d

statrans-

s t r u c t u r e

b u r e a u c r a c y significance

p e r h a p s until a n d

t o

a d m i r -

T h e s e

a n d

r e v o l u t i o n

a

a n d

objects.

m o d e r n

probability

a n d

its

has

inter-

it

T o d h u n t e r ,

r a n g e

f r o m

special

c h a n g i n g

sciences

n o r m a l

statistics

society.

s h a p e d

e x -

a l m o s t

p r o b a b i l i t y

a n d

f r o m

a n o t h e r .

a n d

appreciated,

v a r i o u s

for

S c h n e i d e r .

h o w

e x t r a o r d i n a r y

t h e

t h e

I v o

analyze

h a v e

in

Isaac

t h e

w h i c h

t o

statistics

w i d e - r a n g i n g ,

rarely

decisive this

scholars

T h e y

T h e

o n

a n d

p r o b a -

particular

o v e r

s h a p e d

t h e

v i v i d

m o l e c u l e s

B u t

p r o b a b i l i t y

also

nature,

k n o w l e d g e .

m o d e r n

o f

o f

t h e

discipline

o f

e v e r y t h i n g ,

8.1).

u n d e r s t o o d

w a s

W e

s h e d

o n e o f

g a s

a l m o s t

(see

Stigler, a n d

theirs.

ideas

is

s u c h

S t e p h e n

o f

origi-

"errors"

5.6). E v e n t u a l l y

b r i d g e s

p r o b a b i l i t y

o f

n o t

o u r

b u t

o f

w o r k

t r a n s f o r m a t i o n s

a n d

f r o m

nature's

t h e

a p p l i c a t i o n s

s h a p e d ,

S h e y n i n ,

2.5;

t o

s t r e n g t h

r e p r e s e n t e d

o f

yields, a n d

w e r e

t h e

i n d i v i d u a l

applications

p a s s e d

d e v e l o p m e n t

as w e l l

o f t e n

early

t e c h n i q u e s

o n

first

t h e n

d i s t r i b u t i o n

"application"

h a v e

o n l y

(see

w h e r e

i n f l u e n c e

s t u d i e d

t h e

at

anarchic

life,

t r a n s f o r m e d

as

o f

a n d

a d v a n c e

in a s t r o n o m y ,

a n a l o g i e s

t o o l

ideas

c u r v e

p r o p e r t i e s

n o t i o n s

h o w e v e r ,

o f p o w e r

t o

t h e

O .

f o r m a t i o n s

a n d

a b o u t

treated

c o n c e r n ,

probabilistic

is

m a t h e m a t i c a l

tration

variance

births, k i n d s

w o r l d

a w a y

c o n -

probability

a d e g r e e

t h e

p a r e n t

its

o t h e r

f r o m

in

F a c t o r

b y

a b o u t

a n d

i n v e n t e d

their

4.4).

o f

t h e n

its

c o n c r e t e

m a t h e m a t i c a l

M a i s t r o v ,

t o

f r o m

probabilistic

T h i s

less

f r o m

2.5;

letters,

itself

applications.

e x a m p l e ,

c h a n g e d ,

G a l t o n

b e l l - s h a p e d

collective

t h e

(see

for

h i b i t i n g o r d e r l y

o f

Francis

its

n u m b e r s

c o u n t e d

t h e o r y

m o d i f i e d

for o f

t h e

was

m u c h

d e a d

e v e n t s

c o n t e x t s ,

o b s e r v a t i o n a l

I'homme

as

o f

analysis

rule

analogies. T h e

ably

as

W h e n ,

p r o b a b i l i t y

d e v i a t e d

c o r r e l a t i o n s

t h e o r y

c o m p i l a t i o n s

o f

p o l y m a t h

specific

t h e

i n v a d e d .

ratio

p s y c h o l o g y ,

w a s

fluctuations,

m e a n i n g

h i g h l y

o t h e r

t h r e a t e n e d

o n .

w a s

n a t e

it

t h e o r y

e v a l u a t i n g

o f f s p r i n g

a p p l i c a t i o n

its history, p r o b a b i l i t y

b a r o m e t r i c

the

t h e

a n

p r o b a b i l i t y

for

crimes,

m u c h

o f

disciplines

statistics,

h o w

o f

that

t h e

a

failure

m u c h

m e a n s

q u e s t s

t h e

b e c a u s e

n o w

b e e n

statistics t h a n

t r a n s f o r m a t i o n s

b y

w a s infil-

s y n o p -

Downloaded from https://www.cambridge.org/core. Newcastle University, on 03 Oct 2018 at 11:11:19, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.002

x v

Introduction

tically,

as

t h o u g h t

a single a n d

T h e s e case

historical

life

is

s e c o n d

e n c o u n t e r s

b e e n

neutral

l a n g u a g e

o f

-

o f

t h e

t h e

m i n d

p r o p e r

trade,

(see

u s e

o f

t h e

results

statistics

b u t

o f

N o t e v e n

also

e x t e n t

T h e s e

h a v e

w h i c h

strands

B e l g i a n

are

s t a t e m e n t s p l a y e d

h o w

w i t h

W h e n

t h e r a p y

(see

T h i s

b o o k

is a

s t u d y

o v e r

a o f

t h e b y t h e

r e l e v a n c e

o f

W h a t e v e r

are in

as

o p p o s e d

t h e

a n d

trans-

i m p l i e d

2.3; 4.2; 7.3).

t r a n s f o r m ,

at

as m o d e l s

M e n d e l i a n s

o n l y

t h e

statistics

physicians

n o t

n o

i n t o

has

biological i n h e r i t a n c e

d o u b t e d

be,

s o c i o l o g y ,

c h a n c e , t h e

causality,

d e t e r m i n i s m

t h e

t h e m s e l v e s

t h e

o f a n d

(see

a n d

interactive

b o n d s o n

e x a m p l e , b u t

in

l i n k i n g t h e

a n d

b i o l o g y

p h i l o s o p h i c a l

t w e n t i e t h - c e n t u r y

t h e

issues

this

b o o k .

physicist

J a m e s

o u r as

(see

m o s t

lapi-

4.3). T h i s

o f

b o o k

probabilistic

in

n i n e t e e n t h -

m o s t

p h y s i c s

2.6;

" a b s e n c e

a n d

statistics

t h e

inference.

in

u s

(see

-

p r o b -

raising

their w o r k

c h a n c e

w i t h

o f

e x a m p l e ,

t h e m e s

g a v e

8.3);

p a i r e d

for

British

Laplace

n u m b e r s

i n f l u e n c e s

will in

c o n t e x t :

w a s

t o

e v i d e n c e ,

t h e

free

1.5;

set

p h i l o s o p h y ,

scientific

in e v o l u t i o n a r y

d e p e n d i n g

d e t e r m i n i s m ,

w i t h

issue

b e

C o n s i d e r ,

p e r m e a t e

B e r n o u l l i

role

ideas.

Q u e t e l e t

t h e

c a n

i m p o r t a n t

e x p l a n a t i o n ,

t o g e t h e r

w i t h

for

h o w e v e r ,

m o s t

c h a n c e

A d o l p h e

s u p p l e

c e n t u r y

it

i n e x o r a b l e i m p l i e s

t h e

i n d e t e r m i n i s m . e m p i r e

c o m p a s s

o f

h a u s t i v e

t o u r

d e s c r i b e

t h e

a

o f

c h a n c e

single o f

o r i g i n s

c h a n g i n g t o w a r d s

all, a g a i n , i n

is

t o o

v o l u m e .

a n d t o

for at

b e g i n

d e v e l o p m e n t

t h e

e n d

d e t e r m i n i s m , c o n t e x t

a i m

W e

i n t e r p r e t a t i o n s

t h e

vast

W e

its d o m a i n s .

t h e m i d - s e v e n t e e n t h

-

will,

a s e m i n a l

c o u l d

t u d e s

i m p a c t

t e c h n i q u e s

w a r r e d

qualitative o f

b r a i d e d

o f

n o t i o n s

d u c e

o f

probabilists J a k o b

d o c u m e n t s

T h e

S o m e

g r a p p l e d

dary

strictest

o f

statistician

t h e

o f

u l t i m a t e

in

has e n t e r e d

t h e

statistics

n o t i o n s

i n v o l v e d

free

5.6);

b r a n d

the

process.

discussions

M a x w e l l

d e s i g n "

o f

probability

s a m e

m o d e r n

h a v e

m e t h o d s

i n f e r e n c e

A A ) .

t h e y

science

ideas a n d

t h e

o n

e n d e a v o r .

a d o p t e d

o f

(see

trials,

a n d

t h e

sciences.

ideas t o

t o v i e w

w i t h

w h e n

o f theories,

issue

scientific

e x t a n t

E v e n

influence

quantification.

d e t e r m i n i s m ,

C l e r k

in

o f

t h e v i e w

ethics

p r o b a b i l i t y

t h e

abilistic

T h e

t h e

all i m p o r t a n t

in

at

clinical

t r a n s f o r m e d

effects

w a s

o f

statistics

b i o m e t r i c i a n s

t o g e n e t i c s ,

w h o s e

area

p s y c h o l o g i s t s

6.4). W h e n

t o u c h ,

o f t e n

o f

W h e n

r a n d o m i z e d

t h e y

t h a n

o n e

a n d

probability.

rather

-

o t h e r

t h e y also c a m e

a p p r o a c h

P e a r s o n i a n

n o

translations

mathematical

t e c h n i q u e .

t o o l o f

t o

probability

m e r e

the level o f m e t h o d s c e n d e d

m o v e m e n t

o f

o f t h e o f

t h e

c h a n g i n g c h a n g i n g

u s a

m a p

in

its

c o m p r e h e n s i v e ,

w i t h o f

t o

t w o

in

t h e

b u t

a n

e x -

historical

p r o b a b i l i t y

a n d

n i n e t e e n t h

century.

p r o b a b i l i t y

calculus,

c o n c e p t i o n s

entirety

o f

applications.

c h a p t e r s statistics

H e r e

e a c h

o f

that f r o m

w e

i n t r o -

c h a n g i n g

a v e r a g e s

I n

n o t

atti-

a n d

errors

t h e

s u b s e -

Downloaded from https://www.cambridge.org/core. Newcastle University, on 03 Oct 2018 at 11:11:19, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.002

Introduction

XVI

q u e n t

f o u r

m e n t a l

chapters,

m e t h o d o l o g y ,

n o t

s i m p l y

b u t

t o

t o

list

e x a m i n e t o

assess

i m p a c t

t h e

r e p o r t s

t o

s u c h

k e y

p o i n t s

o f

h a v e

applications d i v e r s e

as

h a v e

legal

s o m e t h i n g

fairness

like

t h e

a n d

o u r

o r

lay

v a l u e s

h u m a n

v i c t o r i o u s

has

a n d

w e

daily

c l a i m

t o

a l o n e

a n d

leave

w o u l d

h o w

intelligence.

t h e

sciences

f r o m

Finally, t h e

s t u d y

v o l u m e s .

if quietly,

a b o u t w e

t o

w e a t h e r

r e q u i r e

d e e p l y ,

hilltop,

fields,

e x h a u s t i v e

a s s u m p t i o n s

general's

t h e s e

is

c o n s e q u e n c e s

life,

a n

e x p e r i -

o b j e c t i v e

e n t e r e d

o n

s h o w

O u r

c o n c e p t u a l

7,

n o

t h e m

that

application:

p s y c h o l o g y .

statistics

w e

instances

altered

a n d

b r o a d

c h a p t e r

c a t a l o g u e

s e l e c t e d

o f

p r o b a b i l i t y

W i t h

A g a i n ,

t o

area

c i r c u m s t a n c e s

p r o b a b i l i t y

-

o n e

physics,

applications.

m a m m o g r a p h y .

w e

o n

at w h i c h

historical

applications

R a t h e r ,

f o c u s

b i o l o g y ,

t h e

t h e

a t t e n d a n t

o f

w e

t h e s e

m a t t e r s

survey,

territory

as

f r o m

w e

h a v e

c o v e r e d . W e

e n v i s i o n

fields t o

a n d

as

b r o a d

i n t e r e s t e d

a m i n i m u m .

d u t y

a

T h e

a u d i e n c e

l a y m e n ,

h a n d f u l

is a b o o k

b y

several

h a n d s ,

story, w i t h

that

o v e r l a p

intersect,

T h e

p l o t

a n d

line

h o n o r

t h e s e

Fisher

in

z i g z a g s

b o u n d a r i e s

t h e

c h a p t e r

statistics

f r e e d o m

for

c o l l a b o r a t i o n o f

t h e

t o p i c

o f

a n y

single

o r in

r e q u i r e d a u t h o r . three.

light

its

c h a p t e r s

o f

( a n d

s t r e t c h e s c h a n c e , A s special p r o j e c t

that d o

a p p e a r

f r o m

technical d o

w e

n o t

all

t h e

a n d

rather

it:

b e g i n n i n g l o t t e r y

scholars

k n o w ,

c o n d i t i o n s .

disciplinary

entire

" T h e

A l l

six

a

m a n y

material

d o

d o u b l e

u s

a

i n

o u r

Bielefeld,

b y

all

R.

o f

o n

o f

t h e

us,

b o o k

o f

b e

t h e

R e p u b l i c

i d e n t i f i e d c o n -

narrative

that

e m p i r e

o f

p a g e .

y e a r - l o n g C e n t e r

o f

g r o u p . c o u n t e d

c o l l a b o r a t i o n t h e

re-

as w e

t h e

title

b y

t h e n

t h e

n o t

a

A

n a t u r e

o t h e r s

a n d o f

h a v e

o f

c o m p e t e n c e

h o p e ,

w i t h

A .

s o c i o l o g y .

t h e

t h e

n o t

i m p l i c a t i o n s

p l a n n e d

W e

at

d i d

e x p e r i m e n t a l

in

o n e

subjects

m e m b e r s

F e d e r a l

as

will, w e

w o r k ,

R e v o l u t i o n "

t h e

m e m b e r s

w h o l e h e a r t e d

w e r e

refrain.

m e e t

o n

e x c e e d s

w a s

n a m e s

a

interdisciplinary

rather p r e s e n t

D u t i f u l

like

e x a m p l e ,

W e

e p i s o d e s

F o r t u n a

t h o s e

d r a f t e d

b y

a n t h o l o g y .

reappear,

-

w e l l

w e a k n e s s e s .

b u t

o r d e r

Probabilistic

S t u d i e s

that

o f interests

e n d .

s u c h o f

a n d

c o l l a b o r a t i v e

t o t o

s c o p e

w e r e

its

in

as

d i s c u s s i o n

t h a n

for

as

m a n u s c r i p t

a diversity

a

o n

c h a p t e r s

a n o t h e r

p h y s i c s

t h e

a n

r e p e a t

d e b a t e s o v e r

k n o w l e d g e

original a u t h o r s ,

u s e d

in

b e c a u s e

S o m e

c o n c e i v e )

f r o m

will

that

will,

w e l l

t h e

o f

t o

r e a d e r as

m e a n s

a p p e a r a n d

discipline t h e

n o

t h e m e s

e n c o u n t e r

criticism

their

it is b y

a n d

a r a n g e

reflect

b u t

p s y c h o l o g y

o f

B u t

s t r e n g t h s

b y

o n e

essential

its c o n t e n t s

c e i v e d

k e p t

c o m m o n

a n d

b i o l o g y ,

w a s

e v e n

a n d

-

o n

a n d

a m o n g

scholars

t h e r e f o r e

characters w h o

f r o m

m e t h o d o l o g y

T h a t

h a v e

o f e q u a t i o n s

tell a c o n t i n u o u s

v i s e d

a n d

b o t h

e x p l a n a t i o n s .

T h i s

t w o

c o m p r i s i n g

r e q u i r e s research

for

Inter-

G e r m a n y .

Essays

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Introduction

w r i t t e n

b y

D a s t o n , eds.,

a n d

1 9 8 7 )

r a n g e

o f

d e n s e

that

n a t i o n s ,

c o n n e c t

narrative,

p r e l i m i n a r y

a b o v e ,

W e

as f r o m

( 1 9 8 8 ) .

W e n o t

also

a d d r e s s e d

in

w h e e l

t a t i o n

turns:

flip-flop

w i t h

a n d o f w e

that

as

see

n o

is

t h e

that

o n l y

p h y s i c s

says,

c h a n g e , o f

" b u r y

F o r t u n a ' s

t h e

this

study.

e m p i r e s

e m p i r e

o f

will

c o n -

i n t o

t h e

a n d

a

i n t e n s e

u p o n

still

o u r

g r e a t e r

w i t h

o u r

m e n t i o n e d

f o r t h c o m i n g ) ,

T h e o d o r e

P o r t e r

L o r r a i n e

research

b u t

twists,

O u r

s t o r y

D a s t o n

o n

crucial

s u b t l e Y e t

also h e r

o w n .

t u r n a b o u t s ,

a n d

c o n f o u n d s

f r o m

strange

a n d

t o

statistical

b u i l d

( 1 9 7 5 ;

m e n ,

c h a n c e .

b o t h

w i d e

literature.

b o r r o w i n g

w i t h

a n d

collections

original

a

essays

d i s c u s s i o n s

t h e

ironic itself.

M o r g a n ,

h o p e d

d e m a n d

( 1 9 8 6 ) ,

fates

a n d

t o p e r p e t u a t e

( 1 9 8 7 ) ,

m u c h

(Kriiger,

across

probabilistic

H a c k i n g

o p p o s i t e s ;

m e c h a n i s m a n d

o n

scholarly

m a n y

their

l e i t m o t i f

as G i b b o n s i g n

as

find

i n t o

o r

o f

six

that w o u l d

Stigler

p r o b a b i l i t y

w e

" c h a n g e a b l e , "

e n d u r i n g ,

f o r t u n e ,

o f

m e a n i n g s

d e t e r m i n i s m ,

F o r t u n a

n o t

Ian

t o p i c

t h e s e

m a n y

M u r r a y

e x i s t i n g

c o n t a i n

as

m a n y

results

g o v e r n e d

o u r

b y

S t e p h e n

t h e t h e

t o

v o l u m e s

o f

w o u l d

b o o k s

D a v i d

o f

a p r o j e c t that

t h e

i n

also h o p e d

heavily

a n d

o f

s u b s e t

g r o w t h

d r a w n

( 1 9 8 1 ) ,

i m p r o b a b i l i t i e s

that

r e c e n t

G i g e r e n z e r

b i o g r a p h i e s

at

a d d i t i o n

h a v e

i n c l u d e

F o r t u n a ' s

o n e

O u r

thick

G i g e r e n z e r ,

c o n t a i n e d

year w i t h

I n

M a c K e n z i e G e r d

F e w

p e r s p e c t i v e .

c o l l e a g u e s , w e

( 1 9 8 6 ) ,

t o p i c s

the

a n d

t w o

K r i i g e r ,

centuries.

v i e w e d

B i e l e f e l d

fill

i m p o r t a n c e

e l e m e n t s

that

efforts.

n o w

1 9 8 7 ;

t h e

a n d

c o n s e n s u s ,

as w e l l

D o n a l d

o n e

t h e

c o l l a b o r a t i v e

project

eds.,

t h e

a u n i f i e d

collegiality o f

B i e l e f e l d

this

d e m o n s t r a t e

fields,

f r o m

in

H e i d e l b e r g e r ,

a n d

single ideas

participants

xvtt

s o c i o l o g y ;

pairings

o f

d r a m a t i c ,

w h e r e a s

t h e

a

t u r n

o f

s c o r n e d e p i s o d i c

vicissitudes

cities in a c o m m o n

suffer

w o r d s

probability

P h i l o s o p h y a n d

e x p e c -

t h e

g r a v e , " w h e e l .

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prospere

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b o o k .

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Paris.

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o f

G o d

. . .

that

state

here.

has afforded o f

us only

mediocrity

a n d

the

twilight

o f probability;

probationership

h e

has

suitable, I p r e s u m e ,

b e e n

pleased

t o

place

to

us

in

. . J o h n

Locke

(1690)

1

Classical

probabilities,

1 . 1

I n

J u l y

o f

p r o b l e m

1 6 5 4

w h i c h

c a m e

a r e i n t e r r u p t e d t h a t

p o i n t .

d e n c e

a t t e m p t

H o w

in

t o

1, p p .

i n c l u d e d

a m o n g

t h e

d a m n e d .

d i c t a t e s t h e

t h e

3 3 - 7 ;

p a y - o f f

t w o

u n c e r t a i n

o f

s t a k e

h o w

e v e n

c.

1 5 2 5 ]

bliss

m a k e

f o r

t h e

b u t

p r o s p e c t

it

t h e

a n d t h a t

m e r e l y

o f salvation

o f

f o u n d i n g first 1 9 7 0 ,

later,

Pascal

c o n v e r t

s p o r t -

G o d ' s

rational

e x i s t e n c e , m i s e r y

for

self-interest

w o r l d l y

(Pascal,

t h e

[ 1 6 5 4 ]

infinite

finite

at

c o r r e s p o n -

n o t

y e a r s t o

p l a y e r s

u n e v e n

t h e

(Pascal,

o d d s

s a v e d

T w o

w a s

S o m e

g a m b l i n g

s c o r e

as

d e s i g n e d

Pascal a r g u e d

c e r t a i n

t h e

c o u n t s

1 9 6 6 ) .

a

e n s u i n g

t h o u g h

w a g e r

a b o u t

P o i n t s :

T h e

m a t h e m a t i c a l l y

c o n d i t i o n s ,

infinite

o f

c h a n c e , w i t h

d i v i d e d ?

s m a l l w e

o u r

P r o b l e m

o f

i m a g i n a r y

infinite

F e r m a t

m a t h e m a t i c i a n s

[ c o m p .

m a t t e r

sacrifice

t h e

b e

c h a n c e

a n

b u t

as

P i e r r e

p r o b a b i l i t y ,

h i s Pensees

s u c h

t o

a g a m e

F r e n c h

C a r d a n o ,

U n d e r w e

o f

t h e

g a m e s

n o

w r o t e

k n o w n

m i d s t

is i n f i n i t e ;

t h a t

b e

s h o u l d

t r e a t

t h e

Pascal

t o

t h e

I N T R O D U C T I O N

m a t h e m a t i c a l

i n g l i b e r t i n e s :

t o

i n

b e t w e e n

d o c u m e n t

vol.

Blaise

1 6 6 0 - 1 8 4 0

p l e a s u r e s

[ 1 6 6 9 ]

1 9 6 2 ,

p p .

1 8 7 - 9 0 ) . T h e s e o t h e r

t w o

f a m o u s

p h i l o s o p h i c a l ,

p r o b a b i l i t y . m e n t s

o f

d o n e d

t h e

It

Pascal

r e v e a l

e m e r g e d

at

s e v e n t e e n t h

t r a d i t i o n a l

ideals

fruitful

a t t e m p t

t o

N e i t h e r

w o u l d

h a v e

m a n u s c r i p t s ,

t h e

d o u b l e

t h e

c r u x

c e n t u r y : o f

a p p l y b e e n

r o o t

o f a

t w o

n e w

c e r t a i n t y ;

m a t h e m a t i c s sufficient

t h e o f

o n e t h e

m a t h e m a t i c a l m a t h e m a t i c a l

i m p o r t a n t

p r a g m a t i c

a n d t o

a

w i t h o u t

r a t i o n a l i t y

t h a t

t h e o f

m o v e a b a n -

a n d

r e m a r k a b l y

o f

e x p e r i e n c e .

d o m a i n s t h e

t h e o r y

intellectual

s u s t a i n e d

n e w

a n d

o t h e r .

P h i l o s o p h i c a l

1

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2

Classical

n o t i o n s

a b o u t

d e g r e e s

o f

antiquity, t o

w h a t

certainty as d o

q u a n t i f y

T h i s

o f

w a s

an

t h e s e

particularly

h a v e

true

scholarly o u r

lations

o f

p r o b a b i l i t y

m e d i e v a l

a n d

h a p p e n s

called

m a n u s c r i p t , dice

a

m a t h e m a t i c s

a b o u t

w h e n

p a n d e d b o o m

it

d i d

rapidly o f

t h e

p r i c i n g

o n

i n f l u e n c e d 1 9 8 7 ) .

t h e

N o r

ticians; o n

Italy

t h e

1 9 5 6 ;

H a c k i n g ,

t h e o r y ,

b u t

probability reverse

a n y

w e r e

tive a n d m e d i e v a l

o f

rhetorical

a b o u t

B.C.,

t h e

spirit

o f

m a t h e m a t i c a l

formalism.

o f

probabilities,

has s o

w h i c h

o f its

a

until

applications.

attracted

l o n g o f

C i c e r o

p p .

o v e r d u e . t h e

in

in

f r a g m e n t s

t h e

I n

classical

a

for

that

n o n e

t h e

o f

o f a n d

w h i c h

w r i t i n g s

t e n t h - c e n t u r y toss

probabilistically

Y e t

is

f o r m u -

his rhetorical

possibilities

r e a s o n e d

C h a n c e

earliest

c o n n e c t e d

8 5 - 9 0 ) .

1 9 7 3 ) .

c o n s i d e r a b l e

S u g g e s t i v e

b e l i e v e d

3 6

o f

t w o

a b o u t

t h e s e

in-

flowered

less

versa

m i g h t

o f

subjects

appear

stimulating T h e

t o

that o f w o r d s

that

t h e

f o l l o w e d

o f

later

Pierre

( K e n d a l l ,

m a t h e m a t i c s

in

o f

o f

p r o b a b i l i t y

t a n d e m , rather

w i t h

t h a n

the

s i g n a t u r e s

l i n k e d

that parallels t h e

o b j e c -

probabilities, b u t C i c e r o a n d h i m

-

D a s t o n ,

t h r o u g h

v e r s i o n s

d o c t r i n e

for

m a t h e m a -

p e r s u a s i o n

d e v e l o p e d

in a w a y

s e n s e s o f m a t h e m a t i c a l tradition

that

col-

basis

m u c h

t h e

Pascal

in c o m b i n a t o r i c s

R e n a i s s a n c e

n o t

1 9 7 4 ;

inspire

f r o m

earliest

h a v e

w o r k

[ 1 9 6 4 ]

strictest

t h e

d i d

-

e x -

c o m m e r c i a l

m a t h e m a t i c a l

c h a n c e

t h e

t h e

later

c a m e

i n s u r a n c e

insurers

w h o

s p e c u l a t e

for

a

( M a i s t r o v ,

early probabilists o f

d u r i n g b u t

d e v e l o p

r e c o g n i t i o n

O n e

1 8 6 5 ) .

centuries,

p r o b a b i l i t y

M a r i t i m e

C o u n t r i e s

m a t h e m a t i c i a n s vice

t h e

m a t h e m a t i c a l

i n s p e c t i o n .

L o w

m u c h

t h e

w h y

u p o n

t h e

n o t

t h i n g s w i t h

subjective

all

d e t e r m i n i s t s

o f t e n

( T o d h u n t e r ,

a t t e m p t e d

the

e v e r y w h e r e

I 9 6 0 ,

a p r e c o n d i t i o n

t w o

t h e o r y

85

s i x t e e n t h

n e w

1 9 7 5 ) .

w a s

t h e

e v i d e n c e

w a s

contrary,

Laplace

c o m b i n a t o r i c s

a n d

s h i p w r e c k s ,

d i d

w o u l d

i n d e p e n d e n t

a l m o s t

T a l m u d i s t s

a n d

It

o n e

f r o m

r e q u i r e s

e l e m e n t a r y .

u p

d i s s o l v e

insurers,

S i m o n

t h e

also

p r e m i u m s .

N o r

n o

d a t e

probability.

fifteenth

statistics

1 6 5 0 ,

m a t h e m a t i c s

w a s

h y p o t h e s e s

in

e x p e r i e n c e

v a r y i n g

q u a n t i f i c a t i o n

s e e m s

( R a b i n o v i t c h ,

o f

plausible

t h e

e n u m e r a t e d

p a t e r n i t y

it

is o r d i n a r i l y

a n d

t h e

for

p r o b a b i l i t y

( C i c e r o ,

1 9 5 6 ) ,

a n d

Several

lect

m o n k

( K e n d a l l ,

heritances i n t o

a

probabile

o u t

a b o u t

B E G I N N I N G S

A r o u n d

w h a t

circa

calculus

b e c a u s e

t u r n

c o r p u s :

w i t h

b o t h

d o

b e f o r e

e x i s t e n c e

a n d

a n d

unreliable

flesh

t h e

t h e o r y

t h i n k i n g

l e a r n e d

t o

m a t h e m a t i c a l p e r h a p s

t i m e ,

sufficed,

T H E

c o m p a n i o n ,

probabilistic

usually

o f

t h e

probability.

a l o n e

m a t h e m a t i c a l

a t t e n t i o n ,

c o n s t a n t

o f

for

o f

this

B u t

s e n s e s

1.2

p r e h i s t o r y

w i t h

interpretation

this c e n t u r y h a d n o

T h e

m o s t

o f c h a n c e .

e n t e r p r i s e

matter,

o n l y

c o n n e c t e d

g a m e s

a n y

m a t h e m a t i c a l subject

h a p p e n s

probabilities

h a d

d o n e

s o

l o n g

the

b e f o r e

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Classical

( H a c k i n g ,

1 9 7 5 ; G a r b e r

b l i n g

h a r d l y

n o t

w a s

h a v e

b e e n

q u a n t i t a t i v e bility

d i d

T h e clues,

o f

catalyst

o n e s .

It is, i n

c o m e

t h e

1 9 7 9 ) .

t h e

s e v e n t e e n t h

t r a n s f o r m e d

short,

o n

r e t u r n

t h e y

c o n c e p t

easier

s a n d

w a s o f

e x a m p l e ,

tickets

d e f i n i t i o n for

t o

t h e

t o

t h e

are

n o t

i n s t e a d

a n

cast

p a s s i o n

c e n t u r y ,

say w h e r e

t w o

for

g a m -

s o

c o u l d

a n d

probabilities

m a t h e m a t i c a l

in

e v e n t

e

a n d

t h e

e x p e c t a t i o n

implies,

w e

n o w

t o

b e

d o

i n t o

p r o b a -

s u p p l y

w e

called

d e f i n e d

o u t c o m e

as

v a l u e

s o m e

d i s c o v e r t h e

probabilities.

calculus

T h e

t h e

that

f u n d a -

p r o d u c t

o f

V:

E

s o m e o n e

h o l d i n g

a prize o f $ 1 0 , 0 0 0

d e r i v e

probabilists

o f

later

=

o f

m u s i n g s ,

c a m e

t e r m s

its

p r o b a b i l i t y

Pascal

e x p e c t a t i o n ,

f o r a fair l o t t e r y w i t h

early

t h e

qualitative

m a t h e m a t i c a l

P(e)V

for

Similarly,

t h e y are r e c o g n i z a b l y part o f w h a t

p r o b a b i l i t y

S o ,

3

f r o m .

I f w e

probabilities,

m e n t a l

o f

that

earliest w r i t i n g s

h o w e v e r .

a l t h o u g h

Zabell,

i n v e n t i o n

t h e

not

v e r y

a n

a n d

probabilities

e x p e c t a t i o n

e x p e c t a t i o n

t h e

o u t

w o u l d

f r o m

w a s

o n e

t h e

o f

a

t h o u -

b e $ 1 0 . A s

t h e

probability,

p r i o r

a n d

b u t

irreducible

n o t i o n . E x p e c t a t i o n tract. t o

Pascal

e a c h

his

o n

in

definition

o f

r e a d e r

as

e q u i t y

w e r e

fair

justice"

a n d

a n d

equal

physicist

that

in w h i c h

B u t

first

intuitively

clear

t o

ratiociniis

that

ludo

equity:

as

aleae m a d e

n o

a

e q u a l

fair g a m e

s e r v e

c o n -

p u b l i s h e d ( 1 6 5 7 ) ,

e q u a l

t o

o r

r e n d e r i n g

first

t h e

e x p e c t a t i o n e x p e c t a t i o n s

o n e ' s

later probabilists

g e n e r a t i o n t o

t h e

H u y g e n s

" w o r k e d

o f

P o i n t s

I n

in

o f

S i n c e

t e r m s

e n o u g h

o f

h i m .

players p o s s e s s e d in

t h e

P r o b l e m

t e r m s

6 0 ) .

expectations for

De

it in

p.

t h e

t h e

Christiaan

is, o n e

1 9 2 0 ,

in t e r m s o f a fair e x c h a n g e

b e l o n g e d

d e f i n e d

[ 1 6 5 7 ]

as o n e

t o

probability,

g a m e ;

circular.

d i s a d v a n -

w o u l d

define

e x p e c t a t i o n s ,

strikes

t h e

this

m o d e r n

o f

probabilists,

n o t i o n s

as

t h e

d e f i n i t i o n s

s t u f f

o f

o f

p o s t u l a t e s .

T h e s e c o m e

i n t u i t i o n s

increasingly

m e r c i a l

law,

e x c h a n g e

t h e

d r e w

u p o n

i m p o r t a n t

aleatory

p u r c h a s i n g

n e x t

year's

Pascal's

w a g e r

p r e s e n t

vices

a c q u i r e d o n e r a t i n g

a n

w h e a t

for

p r o m i n e n c e m e r c h a n t s

annuity,

u p o n

the

o f

s i x t e e n t h -

certain value

c r o p ,

h i n g e d

in

a c a t e g o r y

contract. Jurists

o f a p r e s e n t a n d

a g a m b l e , o n

a

( H u y g e n s ,

fair g a m e

a n d

"in

p o i n t

u n d e r s t o o d

his s o l u t i o n

m a t h e m a t i c a l

d e p a r t u r e

t a g e "

w h a t

m a t h e m a t i c i a n

o b t a i n e d

a

d e s c r i b e d

player

treatise D u t c h

in t u r n w a s

a n d w h o

a

a n d

o u t

b u y i n g

t h e

a

similar

trade

certain

m a d e

that

o f

n e x t o f

s u c h

a g r e e m e n t s

i n s u r a n c e cast t h e

o f

as

t h e

interest

a

c o m -

b i d d i n g net.

e n j o y m e n t

p r e f e r r e d

t h e

staking

fisherman's

A l e a t o r y

f r o m

b e -

as

-

policy,

certain

salvation.

n o t o r i e t y

loans w i t h

a n

h a d

s e v e n t e e n t h - c e n t u r y

d e f i n e d

o r

joy

a g r e e m e n t

for a future, uncertain o n e

t a k i n g

u n c e r t a i n

legal

o f

c o n t r a c t s w a y

c h a r g e s

o f

o f

e x -

u s u r y

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4

Classical

( C o u m e t , m o r a l

1 9 7 0 ) .

e q u i v a l e n t

as h o n e s t l y

as

p e t i t i o n e d

o n

loans, o n

o f

t h e

for

It w a s m e n t

o f

t o

prices,

f u t u r e

l a w

b e c o m e

o f

fold

t h e

s i x t e e n t h

a n d

C a t h o l i c s

S e x t u s

t h e

ideal

l o o k

H i s

-

bear

o f

h o w

w i t h

a

libertine w a g e r s

the

R e f o r m a t i o n

in

k n o w l e d g e

place

it w a s

p r e c i s i o n

o f

a d m i t s :

f r o m

m a t h e m a t i c i a n

r e a s o n i n g

b y

less

class

it is e v i d e n t l y a n d

revival

o f

b e t w e e n

t h e

ele-

p r o b a b i l i t y

stakes, d i d

a n n u i t y

s o

-

s e m i n a l

u s i n g

i n f l u e n c e

h a d

o f

t h e

t h i n g s

just

s o

a n as

t o a c c e p t

f r o m

a

i n q u i r y

since

d o c t r i n e b u t

that

m a i n t a i n e d m a n

in

p r e Ethics

e d u c a t e d t h e

m a n

n a t u r e

p r o b a b l e

rhetorician

I n

u n d e r m i n e

Nicomachean

o f far

t h e

p h i l o s o p h y

r e a s o n a b l e

m a r k

foolish

d e m a n d

m o d e s t

the

i n t o

P r o t e s t a n t s

t o

intellectual

f r o m

m i d -

certainties.

c o m b i n e d

t h e

h a d

t h e

b a c k

sceptical

k n o w l e d g e ,

t o g u i d e

is

led

b y

b e t w e e n

the

m o r e

certain

"it

o f

b e

t h e o l o g i c a l

g u i d e d a

e x p e c t a t i o n s

rationality

m u s t

other,

d i c t u m

equally

t o

o f

t h a n

the

t h a n

q u o t e d :

e a c h

b r a n d

e m e r g e d

Aristotle's

m u c h in

t h e

c o n t r o v e r s i e s

still s u f f i c i e n t

practice. w a s

that

gradually

inevitability that

probability

m a t h e m a t i c i a n s

t h e y

t o

rather

o n

its

t h e

w h i c h

i n t e r l o c u t o r

his s c h o o l

In

interest

is r e c e i v e d , "

that

w i t n e s s

3 0 %

special

2 8 9 ) .

g a m b l i n g

in

a

p r o p o r t i o n

w h a t

-

interest

for

a n d

early applications

n e w

a n d

certain

a

p.

a n d

t e r m s

E m p i r i c u s

subject a

t h e

t h e

o f

k e p t

a d d r e s s e d

e x a m p l e

century,

2 4 - 2 5 )

for

t h e

h a n d , a n d

a n d

( 1 0 9 4 b

all o f

equality

t h e

successfully

1 6 4 5

c h a r g i n g

t h e

contracts,

o n e

n o n e t h e l e s s c e p t

all

t h e

Aristotle. a c c e p t e d

t o

a n d

u n c e r t a i n

o n

w e r e

1 9 5 7 ,

d a n g e r

t h e y

s y n o n y m o u s

b y

is

his

T h u s Jesuits in

w a s

contracts.

a n

century.

t h e r e

b e t w e e n

-

w h o

lawyers,

m e r c h a n t

P r o p a g a n d a

( N o o n a n ,

e x p e c t a t i o n s

is

for

c a n o n

t h e

h a v e .

is c o n s i d e r e d

in a l m o s t

aleatory

a l m o s t

Christian

o f

e q u a l

w o u l d

that

r e c e i v e d "

t h e

e a r n e d

c o n v e r t s ,

"there

p r o b l e m s

w a g e r

s e v e n t e e n t h

b r o w

C h i n e s e

inheritances

o f

Pascal's

his

f u n d a m e n t a l

t h e

a r g u e d

t h e r e f o r e

p r o v i d e d

is

risk,

C o n g r e g a t i o n

q u a n t i f y

B o t h

c o n c e p t

o f

" p r o p o r t i o n

theory.

t h e

a n d

o f

a n d

c o n d i t i o n

e q u i t y

a t t e m p t e d

o f

s w e a t

w h a t

this

labor,

their

the

a n d

e l e m e n t

S a c r e d

d a n g e r ,

d a n g e r

o f

t h e

t h e

d i s p e n s a t i o n

t h e

T h e

probabilities

o f

t o t h e

r e a s o n i n g

d e m o n s t r a t i v e

p r o o f s . " T h e clashes a n d

o f

u l t i m a t e

result

o v e r

f u n d a m e n t a l

t h e

t h e

radical

t e e n t h - c e n t u r y

i m p a c t

w a s

m o r e

l e d g e

w h a t s o e v e r .

side's

claims

t o

t h e

w a s

o f

M i c h e l t o

d e

e r o d e

c h a l l e n g i n g

a p o l o g i s t s

o n

t h e

basis

C o u n t e r - R e f o r m a t i o n a n d

their

M o n t a i g n e t h e

reasoning.

s o u g h t either

t o t o

justification,

a n d

d o m a i n

all c l a i m s

w h o o f

a n d faith

that o f p r o b a b l e

d e v a s t a t i n g ,

l e g i t i m a c y

o f

vastly

t o e x p a n d

R e l i g i o u s

R e f o r m a t i o n principles

s c e p t i c i s m

t h i n k e r s

strative p r o o f a n d

o f

o f

o t h e r t h e

T h e i r

a n y

k i n d

u n d e r c u t

( a m b i g u o u s )

six-

d e m o n -

i m m e d i a t e o f t h e

k n o w o t h e r

r e v e l a t i o n

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Classical

o r

( d u b i o u s )

w e r e

a

a u t h o r i t y

d o u b l e - e d g e d

e r u d i t s "

d e n i e d

t h e

d e m o n s t r a t i o n s ; this

e x t r e m e

religious f r o n t e d m o s t

w i t h

p h i l o s o p h i c a l ,

O r

e d g e

( P o p k i n ,

t h e

t o

" m i t i g a t e d

c o n d u c t

l o n g e r

o f

t o

p r o s p e c t bare

i m p e l

t w o ,

o r

t w e e n t h e

certain

n e w

Pierre

in

e n o u g h

t h e

l i k e l i h o o d

p p .

3 5 2 - 3 ) .

p e c t a t i o n

p r e f e r r e d

W i l k i n s ,

L o n d o n ,

R u l e s

a n d

a r g u e d

in

a n d

o f

profit,

Principles

their A c t i o n s ,

m u s t

religion

( W i l k i n s ,

basis

belief,

o f

scepticism,

for

as

" h e all

[ 1 6 7 5 ]

t h e s e

t h e

R a t h e r ,

C o n -

a n d

o f

t h e

s e v e n p o s i t i o n

a n d

p e r h a p s

p r o b a b l e

w a s

k n o w l -

i n d e e d

k n o w l -

b a d

a n

Principles

w o u l d

m a n k i n d

w r i t e r s

t o p.

d o

d o 16).

w e r e

o b s e r v e

the

of

w a s

w o n t

e m p h a s i s k e y acidly

t o t o

that

1 9 6 5 , o f

the

R o y a l

e x -

s a m e . Society Religion

a l o n g

v o y a g e t o

g o v e r n m e n t o f science a c t i o n

d e f e n s e

o b s e r v e ,

is

also

Natural

u p o n t h e

it

b u t

a c c o r d i n g

t h e

a n d

[ 1 6 6 2 ]

w a s

o f

rational

itself,

like" in m a t t e r s

T h e

o f

rationality

o f

that

A r n a u l d

readers

idea

in

the

e x a m p l e

non

n e w

rationally,

n e i t h e r

b e -

is i n

Duties

a n d

relationship

N i c o l e ,

t h e

hazard

t h e

risk the perils o f

act

t h e

reverse,

t h e

m e n

o f

qua

a n d

c o n v i c t i o n

p r o d u c t

A n t o i n e

their

n o

m i s e r y

a sterling

m e m b e r and

t o

the

sine

b u t

f o u n d i n g

that

t h e

for

o r

the

o u t c o m e

( A r n a u l d

willing

bliss

a n d

the

o f

t o

w a s

r e a s o n a b l e

is a b o u t

infinite

t h u s

d i s c o u r s e

o f

r e c k o n i n g

c o l l e a g u e s

analogies,

w e r e

F o r

probable,

belief

d e g r e e

action.

a n d

m e r e l y

rational

c a u t i o n i n g

a n d

the

that

o f a g a m b l e ,

pass

the

o f

it is a b o u t

s p o k e s m e n

1 6 9 9 ,

t h a n

h a n d

n u m b e r

attain

Pascal's w a g e r

n o r

o r

t o

b e p e r s u a d e d

rather as

s o

t o

r e a s o n i n g

g o o d

Of

attack.

o n e

o f

certainty,

i n t e r m e d i a t e

for

c o m b i n e d

Logique,

D u t c h

his

u n d e r t h e

reverie

o f

p h i l o s o p h i c a l

rather

R o y a l

m i x e d

that just as m e r c h a n t s n a m e

P o r t

b i s h o p

sceptical

k n o w l e d g e

pay-off,

c o m m e r c i a l

A n g l i c a n

a

in t e r m s

it will c o m e

E n g l i s h

c o u l d

"libertins

m a t h e m a t i c a l

m a t h e m a t i c s

rarified

b u t

e x i s t e n c e ,

h o w

t h e

s o u r c e s

a n

in

criterion

u p o n

influential

that

o u t

o f affairs

u n c e r t a i n

c o n s i d e r

a

o n

respectability

e x p e c t a t i o n .

s u c h

w i t h

increasing

m e n

f r o m

m a n

Pascal's

m a d e

t o

the

respectively.

a n d

their

n o t

t h e

stake

an

e x c e p t

n e w

r e s t e d

c o n c e i v e d

a n d

a r g u m e n t s

1983).

T h e

G o d ' s

sinner,

N i c o l e

( 1 6 7 5 )

t u r n

rationality.

j u d g m e n t

J o h n

life.

i m p r e s s i o n s

carve

that

d e m o n s t r a t i o n ,

o f

significantly

t o

t u r n e d

o f g a i n , i.e. u p o n

saint

o t h e r ,

for

a p r u d e n t

in

p r o b a b i l i t y

awaits

in

sceptics"

o f

traditional

that p r o b a b l e

case

p y r r h o n i s m

d o g m a t i s m

certainty

S h a p i r o ,

daily

c o n v i c t i o n

o f

their

a w a t e r t i g h t

sufficient that

m a k e

t h e

d e s t r u c t i v e

s i m u l t a n e o u s l y

fideist

o n

insisted

1 9 6 4 ;

t h e

c a m e

still i n s i s t e d

t h e y

s e n s e

their

b e g a n

a t t e m p t e d

h o p e

y e t

rather,

order

t h e s e

all

a n d

e d g e .

o f

w r i t e r s

a b a n d o n e d

r e v i v e d

o f

b e t w e e n

s c e p t i c i s m

t e e n t h - c e n t u r y

In

all

5

that

Meditations

T h u s

a c h o i c e

m e t a p h y s i c s ,

T h e

reliability o f e v e n

variety.

a n d

d i s c o v e r e d

s w o r d .

D e s c a r t e s '

c o r r o s i v e

that

s o o n

probabilities

as

s u c h o f a n d t h e

against

e v e n

t h e

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6

Classical

m o s t

c o n f i r m e d

s c e p t i c

probabilities

t o o k

his

m e a l s

just

as

if

t h e

e x t e r n a l

w o r l d

e x i s t e d . E x p e c t a t i o n ness,"

as

e s t e d

it

in

w a s

w a s

o f

practice

a n d

t h a n

it m o n e y

t o

o f

o u r

a n d

s e n s e

o f

t h e o r y a t i o n

as a

tuitive T h e s o

S o

that

o f

w h e n

h a r m o n y ,

1 . 3

T h u s

t h e

calculus

trine

rationality

little

conjectandi

o f

b a c k g r o u n d . M o n t m o r t , N i c h o l a s

J a k o b

e n d

this

c o n c e p t ,

v o l v e

q u e s t i o n s

J u s t a n d

w h a t

r e m a i n s

"probability" 1 9 6 8 ) ; h e n c e

1 6 5 7

o f

m a t t e r h a d

o f

m e a n t

t h e J e s u i t

o f

t o p i c s

( J o h n t h e

n e w

p r o b a b i l i t y i n t e r p r e t o f

t h e

in-

m e n . w a s

it

w a s

p o s t u l a t e s

t o

t h e

c o h e r e

p r o b l e m s

o f

for

t o

s o m e

w a s

subject,

w a r r a n t e d

o f p r o b a b i l i s m ,

f r o m

definitive

Ars this

( H u y g e n s ,

Pierre

d e

D e

like

W i t t ,

t h e

e m e r g e d

w h i c h

o f

N i c h o l a s

for as

t h e a

n e w

distinct

c o n t i n u e d

t o

re-

thereafter. f r o m

O r i g i n a l l y b y

Halley,

e v a l u a t i o n

H o o p e r ,

t i m e

day.

d o c -

against

a m b i g u o u s

this

m o d e s t

applications

h a d

e x p e c -

o n l y

t h e applications

m e a s u r e d

o p i n i o n

m o r e

o f

s e v e n t e e n t h - c e n t u r y

Craig, G e o r g e

o f

calculus

( J o h a n n

p r o b a b i l i t y

c o n t r o v e r s y

in o n

that

d o m a i n

m o s t

a

n e w ,

g a m b l i n g

e x p e c t a t i o n

d o c t r i n e

t h e

o t h e r ,

a n d

Bernoulli's

annuities

p e r i o d ,

a n

t h e

w o r k s

evidentiary

a l t h o u g h

i n s t a n c e

J a k o b

like

a n d

t h e s e probabilities a

t o

a r a n g e

c o n s t i t u t e d

o f

t h e

a

legal

r e a s o n a b l e n e s s

w i t h

e v e r y w h e r e

p u b l i s h e d

later

t h e

r e a s o n a b l e

d e f i n i t i o n s

first

a l m o s t

t e s t i m o n y

a n d p r i m i t i v e a r o u n d

q u a n t i f y

a n d

m o n e y ,

c o d i f i c a t i o n

w i t h

-

I N T E R P R E T A T I O N

t o

B e r n o u l l i )

m o r e

classical

o f

g o o d

b e l o w .

a t t e m p t

o f

a c c e p t e d

q u a n t i f y i n g

t h e

clashed

a m e n d e d

c o n t r a c t s

c o u r t r o o m

t h e

o n e

t h e

first

in

-

t h e

i n d u l g e n c e

m a t h e m a t i c a l

t h e o r y

in

c o v e r e d

B e r n o u l l i )

B y

t h e

it w a s

o r

inter-

u p o n

q u a n t i f y

practice

w a s

T h e

Bernoulli),

a n d J a k o b

see

surfaces

A l e a t o r y

historical o r

t h e o r y .

that

t o

s t a m p e d

C L A S S I C A L

treatise

1 7 1 3 ,

o f

a n x i o u s l y

a n

discourse.

H u y g e n s '

results

shall

b e t w e e n

p r o b a b i l i t y

that

o n e

s e e k i n g

a n d

h e a v i l y

t h e

i n v o l v e d

belief

less

t h e o r y ,

u n c e r t a i n

that

w e r e

certain

as a m a t h e m a t i c a l

t h e

classical

c h a n c e

t h e r e b y

alliance

rationality

w e

o f

a n d

l e a r n e d

a n

" r e a s o n a b l e -

a p r e s e n t ,

scientific

future,

d r e w

s h o w

e x c h a n g e

b e c a m e

calculus";

T H E

tations, o f

o f

w h o

as

a

t o

o r

sceptics

t h e y

e x a m p l e s t o

rationality

b u t

M a t h e m a t i c i a n s

b e g a n

t h e

m a t h e m a t i c i a n s

for

for

u n d e r l y i n g

identification

belief,

inevitably

s t a n d a r d s

principles

r e s t o r e

-

salvation.

" r e a s o n a b l e

s t r o n g

t h e

p a s s i o n s

as well.

a n d

rational

n e w

m i t i g a t e d

a l o n g - a c c e p t e d

e x p e c t a t i o n s

rationality

t h e

T h e

r e a s o n a b l e

invest,

t h e o r y ,

t o

called.

c o n t r a c t s

t h e r e f o r e

b e

b e t t e r

in

aleatory

lusts

central

s o m e t i m e s

e q u i t y

d o c t r i n e

t h u s

t h e t h e

a u t h o r i t y

o u t s e t , w o r d ( B y r n e ,

casuists w i e l d e d

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t o

Classical

a b s o l v e

a l m o s t

a n o t h e r t h e

h a d

e v e r y

t a k e n

m i t i g a t e d

this

o f

n o t

o f

o n

levels

v a r i e d

o r d e r e d tainty,

scale, a n d

r e m a i n e d

standing

( 1 6 9 0 ) that

a

I n

t h e

b o t h

o f

o f

f r o m

a n d

practice

s e i z e d

d e g r e e s i n t o

a

o f

l i n g

(J.

o f

r e a s o n i n g

that

t h e

t o

j u d g e p p .

( f o r Ys

as

s e e m

in

m u c h

t h e

as

1 7 1 3 ,

fact

o f

that

o f

m e t h o d s : frequencies

in

e q u a l o f

s o m e

a n

s e v e n t e e n t h - c e n t u r y

w a s

a n cerveritate

b y

Under-

c l a i m e d t h e n

IV.i). as

a

t h e

in

repeat-

t o

disbelief

u n i m p e a c h a b l e

e x -

B e r n o u l l i t h e s e

o r d e r e d t o

o n

g r e a t e s t

m i g h t h a v e

fledg-

t h e

t h e

[ c o m p . w e r e

p o i n t s

t h e

o f

" a r i t h m e t i c

m a y

t h e

J a k o b

d e s c r i b e d

(Leibniz,

w i t n e s s )

t o

H o w e v e r ,

d o u b t

t h e a c c u s e d

T h e s e

2).

assurance

o f

h a n d ,

q u a n t i f y i n g

probabilities

a k i n d

at

c o u r t r o o m

translation

o f

s u b m i t t e d

o f a relative o f

o r

w a r r a n t e d

m u c h

t h r e e

L e i b n i z

d e g r e e s

legal

o f

t h e

m a t h e m a t i c a l

create

a n d

w o r d

x v - x v i ) .

c h a p t e r

as a m e a n s

I n d e e d ,

IV.

n u m e r o u s

1988,

t h e

e v i d e n c e

o w e d

L e i b n i z

total

t h e s e

t h e

a n d

o f

o p i n i o n

1 9 5 9 ,

c o n v e r t i n g

f r o m

that

legal

part c,

o f

1 7 0 5 ]

s o m e t i m e s o f

p r o o f

"

c o u n t

o n l y

m a d e

t h e m

tractable. w h o

set

a b o u t

n o n - a r b i t r a r y

possibilities

events;

d o i n g ,

fractions

m a t h e m a t i c i a n s

probabilities

as

( D a s t o n ,

e v i d e n c e

t e s t i m o n y

s u c h

De

B u t l e r

a n y

t o

[ 1 6 9 0 ]

c o n c e i v e d ,

p r o p o r t i o n e d

T h e

m a t h e m a t i c a l l y

T h e

( L o c k e ,

clear

r a n g i n g

o f

t h e s e

o f m o r a l

m e a n i n g

o f

p r o p o r t i o n e d

e v i d e n c e ,

in s o

k i n d s

t e r m s

e x a m p l e ,

legal

v e r y

s e n s e

hazards"

carefully

4 6 0 - 5 ) .

e x p r e s s e d

assent

probabilities

t h e

m e d i e v a l

"analysis o f

Bernoulli,

o f

Human

J o s e p h

o f life," h e

t h e

W i l h e l m

a n d

certainty

o f

G r o t i u s '

Concerning

B i s h o p

G o t t f r i e d

c o n t i n u u m ,

calculus

1 9 6 2 ,

n e w

certainty,

full

certainty

like

t h e

its

m a k e

o n l y

t h e

iii).

qualitatively o f

n o t i o n

H u g o

g r a d e

t h r o u g h

d e s c r i p t i o n s

a d m i t

Essay

v e r y g u i d e

t e s t i m o n y

analogies

u p o n

o f

h i g h e s t

" m o r a l "

t h e

e v e n

r e a s o n a b l e n e s s

t h e

t h e

b u t

f r o m

discussions,

f r o m

o f

l a n g u a g e

m a t h e m a t i c i a n s

p.

t h e s e

w e r e

a n d

t h e

t o

t h i n g s

L o c k e ' s

W h e n

f r o m

precise

a u t h o r ,

m o s t

o f

o r

H o w e v e r ,

m o d i f i e d

d e m o n s t r a t i o n , d o w n

literature

t o J o h n

are

a d e g r e e

t h i n g s

t h e

1 7 3 6 ,

probabilities

a m p l e s

o f

b y

t h e o l o g i a n

1 9 3 5 ) .

c e n t u r y

r a n g i n g

T h e

t o

that

( D e m a i n ,

p r o p o n e n t s

e v i d e n c e ,

thereafter.

o f

T h e

a t t a i n e d

a u t h o r

that o n e

s e v e n t e e n t h

certainties,

e m p h a s i s

a staple

g r o u n d s

m a t t e r

conjecture.

( 1 6 2 4 )

t o

a n d

o f

7

t h e

probability.

a n d

a n d

early

s e n s o r y

c h a n g e d

a u t h o r i t y

t h e

b u t

the

c o n t e x t

o f

certainty

( B u t l e r ,

"probability" b y

o f

"probabilities

cliche

v i e w

o f

slightly

christianae

i n g

t h e

t e s t i m o n y

religionis

1 7 3 6

m i l d

certainty

certainty

b a s e d

o n

s e n s e

" m a t h e m a t i c a l "

"physical"

t r a n s g r e s s i o n

s c e p t i c i s m

qualitative

s p o k e

a

probabilities

a n d

b a s e d

d e g r e e s

m e a n i n g s

o f

o f

f a s h i o n o n

trying c a m e

u p

physical

subjective

"probability,"

t o

w i t h

at

s y m m e t r y ;

certainty s u c h

m e a s u r e

o r

as t h e

least

t h e s e t h r e e

o b s e r v e d

belief.

( O t h e r

a p p e a r a n c e

o f

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8

Classical

t r u t h first

o r

t h e

w a s

t h e

s t r e n g t h

w e l l

s e c o n d

l o n g - t e r m i n g

a p p l i e d

o f

I n

t h e

six

f o r m e d

f e w

that

m o r e

detailed

a g e

at

w h a t

regular.)

d e m o g r a p h i c

data

p o r t i o n e d

t o e v i d e n c e

arose

w h a t

o f e v i d e n c e

w a s

t e s t i m o n y ,

o f

b o t h

Latter-day " W h a t b e e n I n

d o

probabilists

a

their

b o l d

line

o f probability,

"subjective"

sense,

o f

else; o f

p r o p o r t i o n -

a n d

legal

relative

d r a w n

w h i c h

"probability"

t o

w i t h

a n

a n d

c o r r e s p o n d s t o

i n s o u c i a n c e

m e a n that

m o r t a l i t y

s i x t e e n t h u s e d b y

w h o m

w a s

a n d

d e g r e e t h e

distinct,

t h e

in

o r d e r

t o

a r g u e p r o -

m u c h

o f

a n d

c o n v i c t i o n

probabilities

t o

t h e

a n d

o f

t h e

first

q u e s t i o n ,

m u c h

c o m p a t i b i l i t y

i n k

( N a g e l , t w o

o f

t h e w o r l d ,

t o

o f

m i n d .

states

Y e t

senses, shifting their

m o r e

has

1 9 5 5 ) .

" o b j e c t i v e "

t o states

b e w i l d e r s

a n d

j u d g m e n t .

a n s w e r s

all t h r e e

in-

belief

just h o w

t o

o f

a n d o f

o n

c o l l e c t e d

t h e o r y

s e n s e

t h e

m o r t a l i t y

age,

insurance,

that

after

a u t h o r s

p r o b a b i l i t y

w h a t

L o n d o n

b a s e d

at w h a t

a b o u t

a n d

a s s u m i n g

bills o f

in

c e n t u r y

t h e

t h e

table

w e r e

c o n d i t i o n s

( S i n c e

b e t w e e n

c o r r e s p o n d

a n d

d e c a d e

e p i s t e m i c

q u i t e

e q u i p r o b a b l e

e a c h

applications

as

s u g g e s t e d

d i e d

t o p r o d u c e

m e r i t s

is n o w

t h e

table

life

t h r e e

o f

f r o m

G r a u n t

t h e o r i e s

these

m e a s u r e ? "

u s e d

later

historical,

v i e w

w h i c h

killed

a n d

t h e s e

c a m e

G r a u n t ' s

enlisted

inspired

probabilists a n o t h e r

little

g a m b l i n g

satisfy

f r o m

2 9 - 3 0 ) .

a n d

r e q u i r e d a n d

f r o m

m o r t a l i t y

affairs.The

f r o m

c o u r t r o o m

a r g u i n g

particular,

third

j u d g e ,

probabilities

spilt

m e a n i n g s

t h e

a

a n d

h u m a n

m i n d

b u t

T h e

a s s u m p t i o n s

S e t s

E i g h t e e n t h - c e n t u r y

in

t h e

cities

diseases

p r o v i d e n c e

in

a n d

t h e o r y .

originally

d e a t h ,

annuities,

k i n d

dice

c o n t e x t s ,

situations

p p .

o f

d i v i n e

quantified.)

legal practice

p o p u l a t i o n

price

for

t h e

d e r i v e d

a n d

t h e

1 9 7 5 ,

n o t

w a s

o r

statistics

t r a d e s m a n J o h n

o f

[ 1 6 6 2 ]

m o r t a l i t y

t h e

o t h e r

parishes

a b o u t

c o i n s

d i f f e r e n t

f r e q u e n c i e s

fraction

g u e s s w o r k

f r o m

a p p r o x i m a t e

cause,

o f

s y m m e t r y

E n g l i s h

o n l y

like

m a t h e m a t i c a l

1 6 6 2

s a m e

c o m p u t e

t h e

b y

faith

t o

e m e r g e d

g a t h e r e d

t o

d e v i c e s

successfully

e v i d e n c e .

v e r y

t h e

n o t

third e c h o e d

t o

Statistical

( G r a u n t ,

r e g i s t e r e d

t h e

for

-

w e r e

c o l l e c t i o n

physical

m o r t a l i t y

r o u g h l y o f

o n

w a y .

data

o n w a r d s .

a g e

s e n s e s

b a s e d

a n o b v i o u s

t h e

certainty

t o g a m b l i n g

natality

o n

applications

o u t c o m e s

bills

o f

analogy,

g a m b l i n g

stability; a n d

v a r i o u s

d i f f e r e n t

t o

d e p e n d e d

d e g r e e s

T h e

s u i t e d

o f

probabilities

a n d

t h e

classical

f r o m

o n e

n i c e - m i n d e d

successors. W h y

w e r e

classical probabilists

o f p r o b a b i l i t y jective

a n d

s o

subjective

y a w n s

b e t w e e n

t e e n t h

a n d

v i c t i o n

easily, a n d

t h e m

s e n s e s in

s e v e n t e e n t h

f o r m e d

in

t h e

o f t e n

able

t o

v e r y

fruitfully?

w e r e

c u r r e n t

n o t

o f

t h e n

t h e

f o u n d j u d g e

it in

t h e s e

d i f f e r e n t

I n part,

s e p a r a t e d

p h i l o s o p h y .

c e n t u r i e s

m i n d

c o n f l a t e

Legal

plausible

b e c a u s e

b y

t h e

theorists t o

p r o p o r t i o n

t h e

t h e

o b -

c h a s m

that

o f

six-

a s s u m e t o

n o t i o n s

t h e that

c o n -

w e i g h t

o f

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Classical

t h e

e v i d e n c e

p r e s e n t e d ,

g e n e r a l

c o n t e x t ,

rational

m i n d

t h e

g r e a t e r

[ 1 6 9 0 ] t o

c o n n e c t

b e

t o

g r o u n d s vol.

t h e

First, p r e c e p t m i n d

i n v o k i n g

assents

1 9 5 9 ,

should

II, p.

t o

that

t h e

3 6 6 ) . a n d

qualitative

o n

least

actually

a s s u m p t i o n

probabilities

o n e

t w o

subjective

b e g u a r a n t e e d

it

t h e

" p r o p o r t i o n a b l y

A t

assent

9

r e p e a t e d

p r o b a b i l i t y

o b j e c t i v e h a d

L o c k e

a c l a i m

o f

a p p o r t i o n

s h o w n

a n d

probabilities

t o

side

t h e

o r

f u r t h e r

strict

d i d

so.

relation S e c o n d ,

o t h e r "

n o t

t h e

the

t h e o f

( L o c k e ,

w e r e

qualitative

t o

m o r e

e v i d e n c e :

e l e m e n t s

s e n s e s o f

a

p r e p o n d e r a n c y

t h e

in practice. It w a s

in

o f

in

r e q u i r e d

probabilities.

e n o u g h

e v i d e n c e ;

e v i d e n c e

that it

t h e

h a d

t o

t o

b e

h a d

q u a n t i f i e d . T h e

e m p i r i c i s t

p h i l o s o p h y - « 0 w - p s y c h o l o g y

e i g h t e e n t h

centuries

a n d

D a v i d

H u m e

that

m a d e

t h e

f r e q u e n c i e s

for

this

t o

a n

that

e v e r

past

t h e

vivacity o f

in

a n

rejected

t h e m o f

[ 1 7 3 9 ]

o f

w o u l d

o c c u r

belief t o

t h e

1 9 7 5 ,

p.

t h e

in

vivacity

past

e l e v a t e d

a k i n d

e v e r

c o n c u r r e d

o r

o f

w a s

prejudice,

t h e

T h e y d e n c e h a d

also

w h a t s o e v e r

originally

e v i d e n c e .

F o r

t h e

t o

b e e n t h e

a n

judge,

t h e

f u t u r e

b a s e d

the

c o n j o i n b e i n g

that

[ 1 7 5 8 ] w h e n

subjective

1 9 5 5 ,

a

n e w

c o l o u r s / '

t h e

belief

c o n j u n c that

t h e y

m a t c h i n g

explicitly

past

"as

the

this

t o

o f

t h e

cal-

1 7 4 9 , v o l . I,

a l t h o u g h

u n e x c e p t i o n e d

h e i g h t e n

c o n f e r r e d

Hartley,

habitual,

t o

c o n v i c t i o n

a p p e a l i n g I V . x v ;

p s y c h o l o g y

his

"Essay

e x p e r i e n c e

c h a p t e r

u n c o r r u p t e d probabilities

10). A l l b y o f

p p . o n

t o

at

h o w -

u p b r i n g i n g b e l i e f

w i t h

f r e q u e n c i e s .

i n c r e a s i n g

p r o t o t y p e t h e

1 9 5 9 ,

m i n d ,

f r e q u e n c i e s , t h e

c o n t e n d e d

cerebral

H u m e

f r e q u e n t

the

a

b e e n .

irresistibly

firmer

m e c h a n i s m

c o r r e s p o n d i n g

retained

m o r e

tallied

h a d

t o

r e p e t i t i o n

t h e

t h e

m e r e l y

t h e

h e

e x p e r i e n c e s

m i n d

idea,

( H u m e ,

l i n k e d

b u t

( H a r t l e y

o n

t h e y

ideas

r e c u r r e n c e

u p

brain,

i n f e r e n c e s

e a c h

t h e

[ 1 6 9 0 ]

n o r m a l

o f

past

H a r t l e y

b a s e d

probabilities s h o w e d

a n

it w a s

r e a s o n a b l e n e s s

irresistibly

o b j e c t i v e

o f

rational

that

as

set

a n a d d i t i o n a l vivacity o n

Since

a n d

belief

that

o f

e x p e r i e n c e ,

L o c k e

b e

Hartley,

b e s t o w s

1 3 5 ) .

w o u l d

o f

a u t o m a t i c a l l y their

a n d

Hartley,

association

s e n s a t i o n t h e

s u c h

D a v i d

a p h y s i o l o g i c a l

in

o f

s e v e n t e e n t h

belief in

g r o o v e

t h i n g s

a n d

t h e

that

o f

r e p e a t e d

i m p r e s s i o n ,

m e n t a l

replied

least

e a c h

rationality L o c k e

m a c h i n e

late

Locke,

o f

p r o v i d e

a

f r e q u e n c i e s

M i r a c l e s "

t o

I m a g e s

again.

H u m e

as

d e e p e r

that

c u l u s o f probabilities; L o c k e , 3 3 6 - 9 ) .

far

t h e o r y

d e g r e e s

inevitable.

t o

e v e n t s

scaled

e v e r

belief

a

c o u n t i n g

r e c o r d - k e e p i n g : e t c h e d

p r o p o r t i o n

t i o n

s o

t h e pencil, w h i c h

( H u m e ,

o f

t h e

desiderata. J o h n

r e f i n e d

a n d

w e n t

e x p e r i e n c e , pace

m a d e

s t r o k e

e v e n t s

s t r o n g e r

that

b o t h

a n d

a k i n d

H a r t l e y

n o t o r i o u s l y o n

m i n d

m e n t a l

v i b r a t i o n

c r e a t e d

o f p a s t

a c c o r d i n g l y .

satisfied

o f

t e n d e n c y in o f

t o

c o n t r a s t d e g r e e s

p r o b a t i v e

w e i g h t

r e d u c e

t o o f o f

t h e

all

legal

belief

f o r m s

o f

evi-

d o c t r i n e s

that

p r o p o r t i o n e d

e y e - w i t n e s s

t o

t e s t i m o n y

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10

Classical

that

t h e

a c c u s e d

u n s h e a t h e d

b l o o d y

its quantity. h a d

led

t o

It m a t t e r e d

in

his

probabilities: t e s t i m o n y ,

tales

o f

e r r e d its

internal

b r e a d t h

a n d

a n d

c o n s t a n c y

o f

t e s t i m o n i e s

o n

probabilities

ther.

H u m e

has

b e c o m e

t h e

m i n d

e n c e s

in

a m o u n t

ority"

t o

ability

" W h e n

t o

[ 1 7 3 9 ]

a l l o w e d

associationist

a n d

d i d

b e c o m e

e n o u g h

s i o n

o f

distinct

probabilists

arial m o n y

o f

e m b r a c e d

in

the

w o r k

n o its

w a s

h a p p i l y

f r e q u e n c y

the

credibility

in

w r i t i n g s still

w h i c h

A c c o r d i n g t o

t o

H u m e ,

small

differ-

o n

t e n

a n d

t h o u s a n d a c c o u n t

o f

fur-

e v i d e n c e

e x p e r i m e n t s

slide

o n e

side

o n e ,

that

t h e

superi-

o f

as

c o - e x i s t e d Bernoulli

o n e

t o

t h e

illusion

t h e

t w o .

t h e

o f

e n d

b e

m a d e

their

subjective

o r

t h e

t o

distoro f

probabilities It w a s

n o t

w h i c h

i n t e r p r e t -

the

t w o

classical o f

statistical

probabilities

s o

v e r -

(at least)

u n d e r s t a n d i n g

e p i s t e m i c

w h e n

a n d

classical

e l e m e n t s :

p r o b -

f r e q u e n t i s t

b e t w e e n

p r o b l e m s

that

w i t h

o f

o f

r e c k o n i n g

o b j e c t i v e

b e t w e e n

t o

physical

O n l y

this m e n t a l

a n d

t o

s e n s e

justification.

a t h o r o u g h g o i n g

m u s t

s h o w s

p r o p o r t i o n e d

a u t h o r s ,

f r o m

i n t o

subjective

range

w e l l

s o m e

explicit

m a r k e d

t h e o r y

o f J a k o b

t o

a c h o i c e

T h e

as

as

K i n g

e v a l u a t i n g

c o u n t a b l e

willy-nilly

t o

i n t r o d u c e d

that a c h o i c e

their

his e x -

T h e

" t h e

sensitive

u p o n

e m p h a s i s

t r i u m p h

that

o b j e c t i v e

probabilities

o r

d e m a n d a n d

t o

a c c o r d i n g

b e t w e e n

probability.

a p p l i e d

latter,

belief

shifted

t h e o r y

realization

senses

also,

p a s s i o n

t o

e v e n t s .

t h e

b e c a u s e

p h i l o s o p h i c a l t h e

o f

1 4 1 ) .

little

g a p

d e v e l o p m e n t

ation, as t h e

ability

t h e

p r o b a b i l i t y

t h e

classical probabilists

probabilities

t h e

a n d

p s y c h o l o g y

clear

o t h e r

for

e v o l u t i o n ,

o r

tale

fluid.

as w e l l

t o

e x q u i s i t e l y

t h e

t o

p.

this

create

c o n t r a d i c t o r y

w i t h o u t

place

legal

a c c u m u l a t e d

a l w a y s

Later

this

that

a liar

t h e

n o t

e v i d e n c e

t o

c a u t i o n a r y

t o

w a s

e v i d e n c e

similar

close

as

w i t h

e v i d e n c e ,

integrity,

t h e

a

m u r d e r

e v i d e n c e

n u m b e r ,

c h a n c e s

o n

v e r y

o f

m a d e

o f

past

e x p e r i e n c e ,

I V . x v ) .

w a s

subjective

w i t h

that p r e j u d i c e

m u c h

1 9 7 5 ,

that

a n o t h e r

a n d

his

o f

t h e

c o u n t e r

identical

t h e

p r e f e r e n c e

f r e q u e n c i e s

s y m m e t r i e s

it

in

a m b a s s a d o r

the

e n d p o i n t

c o u n t e d ;

t h e

s e n s e

r e p e a t e d ,

t h o u s a n d ,

g i v e s

for

t h e

w a t e r

also

1 9 5 9 ,

t h e

t h e

o f

totals:

g u a r a n t e e

o b j e c t i v e

t i o n s

s u m

a n d

o f

t o l d

ran

o f

L o c k e

[ 1 6 9 0 ]

n a r r o w e d

o n l y

t e n

Y e t

H e

that

q u a n t i t y

e x p e r i e n c e "

t h e

( H u m e ,

T h e

variety.

r e p r e s e n t s

t h e

j u d g m e n t

m e r e

quality

skill a n d

D u t c h

S i a m e s e

t h e

k i n d s

etc.

canals

o f

r e m a i n e d

their

o n

s c e n e

t i m e s

t h e

t h e

o f

t h e

L o c k e

o f

f r o z e n

t h e

m a n y

o f w i t n e s s e s ,

( L o c k e ,

n o t

h o w

d i s m i s s e d

t h e

o f

f r o m

consistency,

w h o

t r u s t i n g

d e r i v e d

n o t

o f g e n e r a t i o n s

in

fleeing

d i s c u s s i o n

i c e - s k a t i n g

p e r i e n c e

s e e n

c o n v i c t i o n s .

n u m b e r

S i a m ,

o f

b e e n

s w o r d

successful

tradition

K i n g

h a d

probabilities

o f

p r o b a c t u testi-

Laplace.

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C l a s s i c a l

1 . 4

B u t

t h e

w r i t i n g s

m a t i c a l l e d

t o

p r o b a b i l i t y t h e

g e n u i n e n o

e r n e d t h a n

n e e d all

t h a t

o n

m e c h a n i c s T h e

w a s

v e r y

n a t u r a l

M o i v r e ' s

f r o m

w o r d s ,

1 7 5 6 , p .

e n o u g h plify

t o

in

a n d

(J.

sciences " c a n

a n d

a d j u s t

t h e

t h e y

t h a t

c o u l d e q u a l l y

w h o

h a d

i n s i s t e d b e

d i d

b e l i e v e d ,

c a r v e d

t o

a

c o n c e d e p l a c e

t o

d a t a

o f

n o r

w o u l d

p r o v e

r a t h e r

f e e b l e

t o

w a s

w e r e

i n

a n

p r i n -

t o

o u r

g a m b l e d

s o m e

d a y

t h e

for

o n

g a m -

s c i e n c e

c h a n c e ,

c h a n c e

o f

in

in

t h e

A b r a h a m

D e

u n d e r s t o o d "

place,

( D e

statistical

b u t

p h e n o m e n a

just

t o o

w h e n

g o v -

m i n d

still

a p l a c e

c e r t a i n

a c c o r d i n g l y

n o t

IV.i).

t h a t

t h a t

o f

relative

p r e d i c t ;

o u t

m a n

d e f i n e d

r e g u l a r i t y

u n r u l y

1 7 1 3 ,

s u b -

h i d d e n ,

all e v e n t s

p r i m i t i v e

w r o n g l y ,

T h e i r s

p e o p l e s

n o w

o r

i g n o r a n c e ,

states

t h e r e f o r e

b a c k w a r d

m a t h e -

s u p e r - i n t e l l i g e n c e )

t h i n g s .

t h a t

o f

as i n c o r r i g i b l y

intellects

o f

w e r e

B e r n o u l l i ,

f r o m

u n d e r l y i n g

rightly

h u m a n

b e

o f

m a i n t a i n e d

s e e m

n e i t h e r

2 5 3 ) . T h e y y e a r

t h e

Variability, ly

p e r f e c t e d

m o r a l

y e a r

w o u l d

t o

n a t u r e

a s t r o n o m e r s

d i c e

that,

causes, h o w e v e r

t o o l s

p r o b a b i l i t i e s

m a t h e m a t i c i a n s

a n d

[1718]

a n d

t h a t

r e m a r k e d

E u r o p e a n

c o i n s

real

h i s t o r y

s e c u l a r i z e d

h a d

m a k e s h i f t

t h e

t h a t

t h e

m e a s u r e

n e c e s s a r y

p r o b a b i l i t i e s

d e t e r m i n i s m

B e r n o u l l i

m a n i f e s t o e s

L a p l a c e ' s

t h a t

t h e

i n

classical i n t e r p r e t a t i o n

( o r

t o

a n d

t h e

figures

p r o b a b i l i t i e s

G o d

i m m e d i a t e l y

k n o w l e d g e .

t o w e r i n g

t h e

t h a t

w o r l d ,

p r e d i c t a b l e ,

b l i n g

o f

T h e r e f o r e

t h e

e p i s t e m o l o g i c a l

eclipses

v i e w

o f p r o b a b i l i t i e s ;

o f

p e n e t r a t e

t w o

c o n t a i n e d

t h a t

e v e n t s .

states

ciple

also

m a i n t a i n e d

c h a n c e ;

D E T E R M I N I S M

t h e s e

s t a n d a r d

jective. B o t h

h a d

o f

11

p r o b a b i l i t i e s

t h e y like

( P e a r s o n ,

M o i v r e ,

r a t e s

w e r e

c o n f i d e n t

m o r t a l i t y

1 9 7 8 ,

v a r i e d

p p .

t o

s i m -

3 1 9 - 2 9 ) .

as illusory as c h a n c e

w h e n

ful-

i n v e s t i g a t e d . I n

t h e

o r d e r

t o

classical

u n k n o t

p r o b a b i l i s t s ,

p a n m a t h e m a t i c a l ability t i n g

a r o s e

s p o k e

t h e

effects

c l u s i o n s

first

d a t e s

for

in

s o m e t h i n g

least

m u s t a

p r e c o n d i t i o n A t

o f

m u s t

t h e

flourished t o

l a n g u a g e at

a p p a r e n t w e

w h o l e

o f

g l a n c e ,

t h e

p e r i o d

n e w

a

as

G o d ' s s t r o n g

c h a n c e

p a r a d o x i c a l

o f

like

w h i c h

t r e a t m e n t ; a

t h e o r y

it e m e r g e d . s p e c t a c u l a r

g l u e

s u c c e s s e s

f r o m

n a t u r e

t h a t

t h a t w a s

D e t e r m i n i s m

t h u s

s e e m e d

P a s c a l

" g e o m e t r i e

d u

p r o b in

if

fitt o

n a t u r e

fully

c o n n e c t e d p r e m i s e s

o f t h e

r a i n b o w s

c o n n e c t e d

o f

t o

Classical

a s s u m e d

b e c a u s e

d e s c r i p t i o n

e v e n

d e t e r m i n i s m

p r o b a b i l i t y

G a l i l e o

t h e

t h e r e f o r e

a r d e n t

e x p e r i e n c e ,

w a s

a r g u m e n t .

e v e n t s

a b o u t

o f

v i e w p o i n t :

m a t h e m a t i c a l

m a t h e m a t i c a l

t i m e

this

t h a t

t h e

w h i c h

d o m a i n s

as

o f

b e y o n d

in

p h i l o s o p h e r s

m a t h e m a t i c a l f o r

l o o k

m a t h e m a t i c s ,

f r o m b e

p a r a d o x

d u r i n g

strings. N a t u r a l

t e r m i n e d , a n d

spirit

a n d

m a t h e m a t i c s

v i b r a t i n g

t h e

d e -

c a u s e s

a n d

c o n -

b e c a m e

a

n a t u r e . t h e

least

a d m i t t e d h a s a r d "

likely

t h a t

c a n d i -

t h e r e

(Pascal,

w a s

[ 1 6 5 4 ]

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12

Classical

1 9 7 0 ,

vol.

I, p a r t

2, p.

analyze g a m b l i n g script

o n

tician,

t h e

a n d

o b l i g e d

H e

subject

assert

this

r e s o l v e d

w a s

a

t i o n

p r o b l e m s

g r e a t

t h e

t h e

t h e

in

relinquished

his

o f

claim

o f

D e t e r m i n i s m

m e t

as

m a d e

w e r e

T h o s e

real,

t o

o r

" C h a n c e "

Aristotle,

o w e s

y o u

o r

a n

w i t h

a m p l e

beauty,

a n d

o r d i n a r y

m e a n i n g o n

e n d o w m e n t c h i l d r e n

u s a g e ,

ability theory.

b u t

T h i s

o f

o n l y w a s

M o i v r e

ability

m a d e

that,

p r o p o r t i o n

t h e

neatly

o f

D a n i e l

B e r n o u l l i

p l a n e

o f

t h e

t h e

B e r n o u l l i , a b o u t t h e

b y

sions

o f

o f t h e

a n

c o n t e m p o r a r i e s

A l m o s t c h a n c e "

o f c h a n c e

a n y -

rate

a n d

t h e

for

intricate

b e c a m e a n d

f r o m

N i c h o l a s

a n

d e s i g n

like

B e r n o u l l i

c h a n c e w o r l d .

v o c a b u l a r y w h o ( o f t e n a t o m s ) , w e a l t h ,

s u r v i v e d

classical

u p o n

a r g u e d )

d i u s e

t h e

f e m a l e

p r o b -

o f o f

a r g u m e n t deity.

tiny

births t o

t h e t h e

o f

" f r o m T h e

A r b u t h n o t ' s

like

p r o b -

i n

a

dis-

g u a r a n t e e

t h e

1 7 1 0 ) ;

p l a n e t s

solar t o

t h e

in

t h e

s y s t e m

( D .

h a v e

c o m e

h u m a n

d e s i g n "

for

m a t h e m a t i c a l w e r e

d ' A l e m b e r t ,

in

particularly

( A r b u t h n o t ,

c o n s t r u c t i o n

a n d

o f

health,

stability u n l i k e l y

b e n e f i c e n t

e x p e r i -

their probabilist allies

a l i g n m e n t

o r

t o

t h e

m e a n i n g s

m a r r i a g e

a single

s y m m e t r y

t h e -

close

e v e n t s

p u r p o s e

in

as

run.

s o m e o n e

g o o d

a

a n c h o r i n g

a n d p u r p o s e ,

e x c e e d

A r b u t h n o t

e v e n t s

E p i c u r e a n

role

t h u s

b y

in

o f

o f

r e m a r k e d

s h o u l d

s o

a b s e n c e

t h e s e

H e

l o n g

n o t i o n s

( m e e t i n g

o f

f a v o r

t h e

p h i l o s o p h i c a l

i m p o r t a n t

m o n o g a m o u s

t o

intelligent

like

( o r

as e v i d e n c e

a r g u m e n t

a n

o f

A r b u t h n o t

m a l e

o f

p o i n t e d

m o r t a l i t y

A l l

o p p o s i t i o n

a r r a n g e d

ecliptic

" m e r e

p l a y e d

year,

o l d e r

g o o d s

in

it r e q u i r e d

m a t h e m a t i c s

necessity"

natural theologians

institution

1 7 5 2 ) .

regular

e x i s t e n c e

after

t h e

c o n n e c -

f o r t u i t o u s

r a n d o m n e s s

m a r k e t ) ,

1 9 8 0 ) .

m u c h . J o h n

year

future

o n e

e v e n

c o i n c i d e n c e

"blind

in

( h e

probability.

variable

c o n c e i v a b l e

w i t h

o f

o f

tables.

l u c k

2 6 4 - 5 ) .

least

that

o f

e v e n t s

theory

at

a p p l y i n g

" e x t e r n a l "

(Sorabji,

divine p u r p o s e , o f w h i c h D e

t h e

t h e

s o

part

t h e

actual

e v e n

rolls,

g a m i n g

b a n i s h e d ;

e m b r a c e

g e n u i n e

b e e n

t o

as in

w a s

c h a n c e "

for

call

h a d

w a y

necessity,

l u c k

six

necessary

1 9 6 6 , p p .

probabilities,

variously

t h e

1 5 2 5 ]

c o m p a t i b l e

m i g h t

" f o r t u n e "

m o n e y

i d e n t i f i e d

w e

t h e

m a n u -

m a t h e m a -

e v e r y

t h e

t h e

t o

m a t h e m a t i c a l l y

in

at

m a t h e m a t i c a l

o f

I n his

i n t e r v e n t i o n

a n d

as t o

s t a n d a r d s n o t

t h e

felt

o n c e

d i s r u p t e d

c.

a t t e m p t s

Italian physician,

C a r d a n o

t o

probabilities,

w e r e

w h a t

since

t h o r o u g h

t h e

t h e

this p r o b l e m .

e x p e r i e n c e

w h e n

" g e o m e t r y

s t a n d a r d s

a n d

arrived

c o n s t a n t

t h e n

w i t h

the

u n d e r l y i n g a

just

probabilities [ c o m p .

m a t h e m a t i c a l

o c c u r r e d

w h i c h

f o u n d i n g

s o

die

a p p e a l

o w n ) ,

t h e o r y

stable

e v e n t s

w h a t

e n c e .

t o

d e t e r m i n i s m

e x p r e s s i o n s

variable

his

a

his o w n

a n

( C a r d a n o ,

Classical p r o b a b i l i t y c l i m a t e

w i t h

o v e r

1 5 2 5 ) ,

o f

o f

u n d e r l y i n g

o f particular players

c.

earliest

G i r o l a m o

face

face

conflict

b e l i e v e r

b e t w e e n

e a c h

in

v e r y

s t u m b l e d

g a m b l e r

that

flew

T h e

( c o m p o s e d

i n v e t e r a t e

t o

a l t h o u g h

1 0 3 4 ) .

probabilities

criticized

w h o

n o t e d

eye; t h e v e r b y that

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C l a s s i c a l probabilities

all o t h e r

i r r e g u l a r

p r o b a b l e . i n g

H o w e v e r ,

c h a n c e

c h a p t e r

in

I n d e e d ,

s u c h

inspired

r a t e s

o f

O n l y

t h e

i n

r e g u l a r i t i e s

B u t

f o r

side

t h e

causal

visional,

a n d

It

p e n e t r a t i n g

a

p r e c e p t

t h e

p a r t

o f

a t i o n

b y

h o w

t h e

m a t t e r

t h e

m o r e

fluid

w a s

s o u n d

b e

t o

o f

v a r i o u s

p r o b a b i l i t y (Laplace,

m e n .

w a s

in

[1814]

w i t h

failed W h e n

A s

t o

i n t u i t i o n s t h e

p r e d i c t

t h e

results o f

d r a w i n g

p .

it

w a s

l u n a r o f

a n d

p u t

" o n l y Its

p a r t

h e l d

u p

Classical

it

in

o f

a

t o

w a s

a

a

w a s

t h e o f

s o

t h e

test.

m u c h

t h e

t h e o r y

p s y c h o l o g y .

If

I n

a

m o d e l t h a t

c o n t r a s t d i d

a n d

m a t h e m a t i c i a n s

h a d

t o n o

c o n d u c t

m a t h e m a t i c a l a

c a l c u l u s "

m a t h e m a t i c a l o f

t h e

s q u a r e w h o

t o n o t

t h e o r y

a

a s t r o n o m i c a l

n o t

a

w i t h

c e r t a i n

d e s c r i b e d

for

as

e x p l a n -

t h e o r y

t o

o f

t h e

w a s

m a t h e m a t i c s

w o r s e

d i d

o f

c e n t u r y ,

p a s s a g e ,

m a t h e m a t i c a l

e m p i r i c a l

slant,

c o n j e c t u r e , "

beliefs

t h a t

c h a r -

i n t e r p r e t a t i o n

r e d u c e d

less

p r o -

s u b j e c t i v e

m a t h e m a t i c s

f a m o u s

it

t h i n g s ,

s u b j e c t i v e

A r i s t o t l e ' s

t h e

as

t h u s

m a t h e m a t i c a l

viz.

o n o u t -

m e r e l y

w a s

p r o b a b i l i t y

s e n s e

o f

c o n f l a t e d

o f

celestial m e c h a n i c s

p r o b a b i l i t y it

f o r m s

m i x e d

m a t t e r ,

p e r t u r b a t i o n s ,

m e n ,

b y

f r o m

a i m s

s u b j e c t i v e .

" a r t

i n d e p e n d e n t

s t a t u s

o f

w o r l d

1 9 3 b 2 2 - 1 9 4 a l 5 ) .

g o o d

t h a t

t h e

e i g h t e e n t h

d e r i v i n g t h e

s t o o d

" i n t e r p r e t a t i o n "

o r

4 9 ) .

lease

t h a t

associationist

a n

t h e

m i x e d

s u b j e c t

t h a n

classical

r e a s o n a b l e

t e r m

m a t t e r s .

6 ) .

like t h e

this

m a t h e m a t i c s ,

L a p l a c e

a p p l i c a t i o n s

s u c h ,

its

e s s e n c e

1 9 5 1 ,

set o f p h e n o m e n a , m o t i o n .

A s

o f

o f

p .

statistical

n e w

w e r e

p r o b a b i l i s t s

in

a

p r o b a b i l i t y

c h a n c e s , "

{Physics,

p r i o r

s u b j e c t

i n d e p e n d e n t

r e a s o n a b l e

t h e o r y

a

h e l p

call

called

a

l i g h t

t o

o f

o p t i c s

a p p l i e d

p r e s u p p o s e

e x i s t e n c e

o r

a n d

necessarily

t h e

(see

d i f f e r e n t

see

t h a t

s e e -

g e n e r a l , 1,

p r i n c i p l e s "

t h e r e f o r e

classical

v a r i o u s l y

m a t h e m a t i c s , "

m o d e r n

a p p l i e d

t h e

" d o c t r i n e

h a r m o n i c s

o f

t o

a n d

w i t h

" l u c k "

t h e r e f o r e

p r o b a b i l i t y

m i s l e a d i n g

for

T h e

o f

v e r y

P r o b a b i l i t i e s a n d

vol.

c h a n c e

a n d

in

Siissmilch,

a l l e g e d

c o u l d

m a t h e m a t i c a l

s e n s e

f r e q u e n c i e s

t h e o r y

" m i x e d

o f

a

t h e o r y ,

t h e o r y .

p r o b a b i l i t y

i g n o r a n c e o f

w e

i m -

h a n d i w o r k

1 7 7 5 ,

o f

a n d

s p r i n g s

causes.

D a r w i n

c o n s t a n t ,

t h e

a n d

as

e i g h t e e n t h - c e n t u r y

"a

[ 1 7 4 1 ]

its d u e

If

just

p a s t o r J o h a n n

" c h a n c e "

d e t e r m i n i s m

s o m e w h a t

m a t h e m a t i c a l was

h u m a n

b y

o b j e c t i v e

is h o w e v e r

g i v e n

n e c e s s a r y

t h e

b a c k g r o u n d

" h i d d e n

i n t e r p r e t a t i o n

p r a c t i c e a n d

o f

t h e

o f

w h e n

s u p e r s t i t i o n s .

t o

o n l y

figment

i n

c e n t u r y ,

u n t i l

d i v i n e

m o r t a l i t y ,

(Siissmilch,

variability

o f

G e r m a n

t h e

r a t i o s w e r e

p e r s i s t e d

m a n y

a n d

a g a i n s t

w e r e

b i r t h

t r a c e s

t h e

classical p r o b a b i l i s t s o r d e r

classical

in

belief

t h e

w a s

d i s c o v e r

a c t e r i z e d

o r d e r . "

e x a m i n e d

life.

w o u l d

like

m i d - n i n e t e e n t h

c o n t r o v e r s i e s ,

t h e

m a r r i a g e ,

b e a u t i f u l

w e r e

w a s ,

w h o ,

natality,

a n d

T h e

beliefs

d e m o g r a p h e r s ,

o r

t h e o l o g i a n s b y

a n d

w e

n a t u r a l

e v e r y w h e r e

c o m p l e t e ,

really

t h e

o f p l a n e t s

r e f u t e d

4 ) .

statistical s a w

a r r a n g e m e n t s

13

l u n a r t h e o r y

t h e o r y . w i t h

r e t u r n e d

t h e t o

b o a r d .

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Classical

14

1 . 5

T h e

p r o t r a c t e d

s u c h

a clash

a n d

illustrates

" g o o d letter

t o

latter's c o i n

h o w

sense."

Essai

toss

d'analyse

sur

w i t h

a

P a u l

r e c e i v e s

a c c o r d i n g fair

E

price

=

t h e

o f

(Vi

S i n c e a n

t o

t h e

+

t h e r e

is a

small

H o w e v e r ,

the

t o

as

t h e r e

is

in

c l u d e s

a n

infinite

results

o f

t h e

m i g h t for

o f

this

o f

m a t h e m a t i c i a n s m a t h e m a t i c a l

T h i s celebre

o n l y

Paul's

X

R a t h e r , t h e o r y

A p p l i e d

e i g h t e e n t h

u p

. .

. +

m o d e l i n g

o n

( a n d

t h e

t h e

o n .

a

play

until the s o

in

o f

P a u l

h e a d s

a first

s e c o n d

R e c k o n e d

t h e r e f o r e

event,

all

[(1/2)" X

e v e n

p a y - o f f s

a

fair

the

w o u l d

p a y

l a b e l e d

t h e

s t r u c k

is

b e

s o

suitability

that

r o u t e

c e n t u r y .

o f

a

in

s u m

p a r a d o x ,

w e r e

t o

play

it

c o n -

a s s u m p t i o n s

o f

w i t h t h e

p r e -

that

t h e

the

t o

t h e

m a n i f e s t

m o d e r n

o p e n

e y e s

a n d

that

m a t h e m a t i c a l

n o t

t o

infinite.

p a r a d o x i c a l

o d d s

their

t h r e a t e n e d

is

e x p e c t a t i o n

t h e

w a s I n

a small

as

at

p r o d u c e

s t r a i g h t f o r w a r d ,

o f

.

in p r o p o r t i o n

f r o m

t h e m

. .

c o m m e n t a t o r s

this

d e r i v e d

+

will

e x p e c t a t i o n

e v e n

d e f i n i t i o n

$2"-')]

c o i n

increase

s u b s e q u e n t

c o u l d

s e n s e

theory,

e d i t i o n

a n d

t u r n u p

m a t h e m a t i c i a n s

t h e

b u t

n o t

e x p e c t a t i o n

it

Pierre

o f

just

B e r n o u l l i

s e c o n d

c o m e s

+

results

o f

task

toss, $ 4 , a n d

that

an

m a n

probability

N i c h o l a s

t h e

w a s

be:

t h e

a n d

o f

e x p e c t a t i o n

$ 4 )

s u c h

p r o b l e m

their

b y

in

c o i n

third

m a t h e m a t i c a l

results a n d g o o d

s e n s e t h e o r y

the

clash

m i x e d b e t w e e n

t h e v e r y validity o f

m a t h -

probability. is w h y

a m o n g

St.

t h e

b e t w e e n

p r o b l e m s ,

t h e

St.

P e t e r s b u r g ,

n a m e d

issues o f

t h e

the

a

probabilists.

t h e

first

p r o b l e m

that

n e w

p r o b l e m , I n

trivial 1 7 3 8

in

itself,

N i c h o l a s '

b e c a m e c o u s i n

a resolution o f the p a r a d o x in the annals o f the

d e f i n i t i o n

r e a s o n a b l e n e s s p r o p o s e d

P e t e r s b u r g

classical

Bernoulli published o f

the

since

o f

q u e s t i o n e d

t h e

t o o k

( 1 7 1 3 ) .

m a t h e m a t i c i a n s

sense.

o f

If

c h a n c e

calculation t h e

h a v e

class

e m a t i c a l

the

m a t h e m a t i c a l

s i m p l y

hasard

(i/s

B e r n o u l l i

a n s w e r .

g o o d

+

r e a s o n a b l e

T h e

de

w o u l d

finite

c o n t r a d i c t i o n

n o t h i n g

dictates

$ 2 )

probabilities

validity.

dictates

p u b l i s h e d

until

tails, a n d

n o

a n d

g a m e )

X

N i c h o l a s

the

p r o p o s e d

m e t h o d ,

b u t

A l t h o u g h

n o

e q u a l

o f

o b s e r v e ,

g a m e .

tained

(V4

r u n

decreasing

q u i c k

t h e

$ 1 )

P e t e r s b u r g

Paul $ 1 ; if h e a d s d o e s

s t a n d a r d

X

a n d

first

coin.

$ 2 ; if n o t

p l a y i n g

u n b r o k e n

w a s

lesjeux

fair

St.

m a t h e m a t i c i a n s

M o n t m o r t ,

toss, Pierre agrees t o p a y toss,

t h e

reasonableness

p r o b l e m

d e

g a m e

o v e r

seriously

T h e

Pierre

R E A S O N A B L E N E S S

c o n t r o v e r s y

b e t w e e n

probabilities

o f

after

o f

the

s u c h

o f

the

a t t e m p t s .

A c a d e m y ;

probabilistic

a n i m a t e d

n o t i o n

m a n y

it also

e x p e c t a t i o n

s u b s e q u e n t

r e a s o n a b l e n e s s ,

D a n i e l ' s raised a n d

the

a

cause

D a n i e l A c a d e m y

m e m o i r

n o t

f u n d a m e n t a l

its relationship

c o n t r o v e r s y .

a n d

a

I n

r e d e f i n i t i o n

essence, o f

t o h e

e x p e c -

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Classical

t a t i o n w a s

t o

m a t c h .

like

t h e

an

o f

p r u d e n c e

e q u i t y

t h a n

t h a n

t h e

p r o d u c t

k n o w n v i d u a l

p r e f e r e n c e

richer

y o u

assuringly

small

m o n i z e d

m e n

o f

their c a r g o t a t i o n

g a v e

it

o f

H e

o f

w a s

affairs

k n e w

several that

o u t c o m e

w i t h y o u

a c c e p t e d t o

o n

that

c o n f i r m e d

their

b e

e x p e c t a t i o n

o f

d e f i n e d

w h a t

b e c a m e

later

relative

t o

m o r a l

utility

d e r i v e for

beliefs:

for

a n d

( D .

a

re-

t h e

St. har-

e x a m p l e ,

t o

distribute

m a t h e m a t i c a l )

w i s d o m

t h e

e x p e c t a t i o n

tables n o t

t o

indi-

that

m a k i n g

f o r t u n e ,

a n d

( b u t

h a d

o u t

t o

able

o n e ' s

g a m i n g

m o r a l

m o r e

p r u d e n c e ,

B y

w a s

o f

P e t e r s b u r g

u n d e r s t a n d i n g

h e

s h o w

t h e

ships, a n d

St. a c t e d

v a l u e s

h a p p y .

practices

a v o i d

o f

a n d

t h e

w e a l t h ,

t o

t h e

e x p e c t a t i o n

s u b s t i t u t e d

m a k e

able

o f

e x p e c t a t i o n

characteristics

players

e x p e c t a t i o n

d e p e n d i n g

also

o f

" m a t h e m a t i c a l "

t h e

m o n e t a r y

w i d e l y

results

t h e

like

t h e

d e f i n i t i o n

t o

t o

i n d i v i d u a l

H e r e

values,

t a k e s

o t h e r

a m o n g

the

is, B e r n o u l l i

m o r e

d e f i n i t i o n

in situations

" m o r a l "

e x p e c t a t i o n s ,

g a m e .

w i t h

a n d

m o n e t a r y

t h e

stake.

c o n t r a s t

T h a t

for

t h e

at

t h e

s t a n d a r d

that

p r o b a b i l i t y

f u n c t i o n

P e t e r s b u r g

s o b e r

t h e

as its utility.

l o g a r i t h m i c

I n

p r o p o s e d

o f

are,

w a s

15

i g n o r e s

a r g u e d

fairness,

accordingly.

t h e

w h o

e q u i t y

o f

B e r n o u l l i

that

j u d g e

B e r n o u l l i

m o r e

m o d i f i e d

as

impartial

risk-takers,

p r o b l e m

O b s e r v i n g

probabilities

e x p e c -

B e r n o u l l i ,

[ 1 7 3 8 ]

1 9 5 4 ) . Significantly, o f

trade

n a t e d

a n d

t h e

p r o f e s s o r as a n " t o

D a n i e l

c o m m e r c e ,

earlier o f

b o t h

justice."

H i s

t h e

Bernoulli

N i c h o l a s

s i d e d

tracts;

D a n i e l

d e n c e ,

d e r i v e d

l o n g e r

a n

matical

D a n i e l m e a n s

w i t h w i t h f r o m

o f

t h e

l a w

w h e t h e r

that

w h e r e i n s e n s e

t h e

increasingly

c o m m e r c e . b u t

p r o b a b i l i t y

probabilities u p

P o i s s o n , p o i n t e d

-

b y

w a s tails? o u t

t h e

o t h e r

p r o b l e m it

that

a c c o r d

w a s

Swijtink,

t h e l e n g t h

o f

o f

at issue

d e r i v e d

w h o

Basel

w i t h

e x p e c t a t i o n

o f

as

w e l l failed

e q u i t y

a n d

e x p e c t a t i o n

s h o u l d

t h e

m o d e l

consisted.

aleatory

c o n -

e c o n o m i c

r e a s o n a b l e

m e r c h a n t ,

w a s

b e t w e e n

f r o m

s e n s e

m a n

a n d

p r u -

w a s

t h e

n o

m a t h e -

shift.

P e t e r s b u r g

n o t

d o m i -

e x p e c t a t i o n

p r o b l e m

classical probabilists.

lay

h a d

r e a s o n a b l e n e s s

c a n n y

St.

that

d e f i n i t i o n

W h a t

w i t h

really physically

(see

in

n e w

that

w o r l d

B e r n o u l l i ,

m o r a l

p r o t o t y p i c a l

reflected t o

that

e q u i t y

a

t h e

e x a m p l e s

i m p o r t a n t

T h e

f r o m

U n i v e r s i t y

s u c h

o f

rather

s o l u t i o n

t h e

probabilistic

o l d e r

t h e

his

d r a w n

N i c h o l a s

participant

t h e

a c c e p t e d

at

e x p e r i e n c e . "

rather

t h o u g h t

t u r n

replied

j u d g e

legal

o b j e c t e d

e v e r y

w i t h

t h e

w e r e

e x p e c t a t i o n .

c a n o n

o f

n o t

b u t

universally

c o n t i n u o u s l y D e n i s

w a s

Bernoulli's

d ' A l e m b e r t ,

a n d

D a n i e l

impartial

t h e o r y

o f

t o

m a t h e m a t i c i a n ,

p e r f e c t l y

cousins

e x a m p l e s

c o n t r a s t

p r o s p e c t s

r e a s o n a b l e n e s s ,

w i t h

R o m a n

c o u s i n

" h a r m o n i z e [ d ]

in

d i s c u s s i o n s

a c c o m p l i s h e d

e v a l u a t e

B e r n o u l l i ' s

t h e

1 9 8 6 ) . o f

S o m e ,

m o n e t a r y

p o s s i b l e

for

O t h e r s ,

t h e g a m e

w a s

w a s

a

b y

like

n o J e a n

v a l u e s fair

like

c o i n

b u t t o

S i m e o n -

l i m i t e d

b y

t h e

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16

C l a s s i c a l

w e a l t h t h a t as

o f

t h e

t w o

players.

m a t h e m a t i c a l

a n

a v e r a g e

1 9 8 7 ) . t h e

m a n y

H o w e v e r ,

v e r y

w e r e

o f

as e x p e c t a t i o n

a t t e s t s

t h e i r

i n g

t h e

this

fluity.

If

h a d

k n o w n

w a s

t h e

t h e i r

i n

o f

b y o f

e x t e n d

at

a

w o r d s ,

ideal

o f

a

i n t o

a p p l i e d

1 9 8 0 ;

J o r l a n d ,

a n d

fact

s t r u c k

t h a t

as

f u n -

g o o d

g o a l

at

classical

p o s t u l a t e s

calculus w i t h

o f

s e n s e

q u a n t i f y -

a n d

w h a t

e n v i s i o n e d

o f

strife.

e v e r

a h o s t

q u i p p e d n e e d s a

a

k i n d

n u m b e r s

t o

a n d

d o e s

o f

t h e i r

t h a t

f u n d a m e n t a l

o n e

t h a t

s u g g e s t e d

o f

f o r

t o

a p p l y i n g

w a s

h o p e

o f

t o

t h e

h e l p

hommes

w h e n

i n d e p e n d e n t

t u r n i n g

t h e

relied

u s e

t r u l y

t h e

f a m o u s

t h e

e v e r y o n e ' s

a n d

" a r t

s o m e

o f

also

o n l y

situ-

m e t h o d , b e s t

c a p -

d i s c r e t i o n , m a t h e m a -

satisfaction, w o u l d

o f

e x t e n t

p e r p l e x i n g rules

o f

fascin-

m e t h o d s

p e r s o n a l

l e a r n e d

i n v e n t

t o

L e i b n i z

t h a t

t h e

s e v e n t e e n t h -

e n d ,

o u g h t .

o u t

e v e n

r u l e s

a l w a y s in

t o

f o r m a l -

s e v e n t e e n t h - c e n t u r y I n

t h e

p o s s i b l e

f e w t h a t

m a n y

c h a r a c t e r i s t i c " a n d

i n t u i t i o n s

sophistry.

f o r m a l

e l i m i n a t e d

a m o n g

i d e a s

B y

f o r t u n a t e

D e s c a r t e s '

p r o b l e m s

" u n i v e r s a l

t h e

l i m i t e d

calculus

O b s e r v i n g

set

u n a i d e d

m a t h e m a t i c a l

b y

a

w h a t

T h i s

it

a

c a l c u l a t i o n s )

o r

lights

o f

t h e s e

r e a s o n i n g

e x t r e m e .

o f

b y

m e c h a n i z e d

e c h o e s

w e r e

e n o u g h

O n l y

p r o b a b i l i t i e s

o b s c u r e d

calcur e p l i e d

c o m m o n .

c o d i f y

o f

a n d

p r o b a b i l i s t s

e y e s i g h t

t h e

a t t r a c t i o n

lesser

e m p h a s i z e d

spectacles.

p r o b a b i l i s t s '

a n o f

t o

t o

p r e f a c e

n a t u r e .

calculus

f r o m

a p r o p r o s

f o r m a l

r e s o l v e d

t h e

fatal

t o

b y

s u p e r -

e n l i g h t e n e d

s u b c o n s c i o u s

n o r m a l

r e a s o n i n g ,

calculus

t h e r e f o r e

o n e

allure it,

a n d

for

c o m p l i c a t e d

o f

t a k e n

actually

p r o b a b i l i s t s

b e n e f i t

t h i n k e r s . T h e

m e t h o d

b e

o f

t h e

t h a t

t o

risk

e q u a t i o n s

a c c u r a t e l y

c o m p a r e d

s e v e r a l

n o t

s o u g h t

n a t u r a l l y

c e r t a i n

a

T h e

r e a s o n

similarly,

A n d

a

o b v i o u s . w a s

t h e

w h a t

o f

s e n s e

r e s p o n s i b l e

c a m e

e c h o e d

e n d o w e d

b e

r a n

m a c h i n e r y

t h e

t o

w e l l

c o u l d

s u c h

o n e

w i t h

s o

calculus

Leibniz

assign

a r g u e d

w h e n

real o n e ,

m a t h e m a t i c a l

p r o b a b i l i t i e s

b e l i e v e d

t h a t

e x e r t e d

o f

c o u l d

e x t r e m e l y

D e s c a r t e s ,

t h e

o f

n o t

m a n y .

w a s

e l a b o r a t e

eclaires

s e n s e

j u d g m e n t ,

ticians

a

a l w a y s

t h a t

after

c o m m o n

s o m e t i m e s

h a n d

t a k e s

t h e

b e l a b o r i n g

s e n s e

ations. A s

a n d

w a s

m a t h e m a t i c a l

all

p r e f a c e

artificially;

g o o d

w i t h

t u r e d

m i x e d

t h e n

p r i n c i p l e s

c o n j e c t u r e "

o n

( D a s t o n ,

t h e i r

as

e i g h t e e n t h - c e n t u r y

B a c o n ,

o n l y

a n d

r e a l i g n

t h e

b u t

d e f i n i t i o n s

-

g o o d

c o n t e n t ,

a t i o n

t o

t o

C o n d o r c e t ,

T h e

a l o n g

polloi

c o u l d

T h e o f

hoi

b e f u d d l e d

issue

o r d e r

w i t h

N .

t h e o r y .

r e s u l t s

calculus

v i s i o n

t h e

eclaires

p a r a d o x

y i e l d e d

p r o b a b i l i s t s

o p t i c a l

i z e d

g a m e

calculus

hommes

t h e

t h e

u s e

s a m e

t h e

t h e

p r o b a b i l i s t s

s e e m

elite

m o d e l

o f

A .

c o r r e c t ,

classical

-

t h e

V o l t a i r e ' s

( w h i c h

t h e

all

d i d

i n t u i t i o n ;

f o r

i n d e e d

t i n k e r

i n

M . J .

m a t h e m a t i c a l

c o m m i t m e n t

g o a l ,

case

l a t i o n s

s m a l l

t o

like

r e a s o n a b l e .

G i v e n

that,

t h a t

t h e

w i l l i n g

d a m e n t a l t o

w a s

r e p e t i t i o n s

all a g r e e d

f o u n d a t i o n s

p r o b a b i l i s t s

Still o t h e r s ,

e x p e c t a t i o n

t o

probabilities

h e

s o m e h o w

a r i t h m e t i c - l i k e

o p e r -

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Classical

a t i o n s t o

t o

p e n

t h u s

c o m b i n e

a n d

b y

p a p e r

t a k i n g

(Leibniz,

a b l e n e s s

c o e r c i v e

Classical s c r i p t i o n t h e

o f

it

for

w a s

t h e

o f

o f

t h e

t h e

a w i t n e s s .

t o m e

solar

o f

as

t h e

w h e n

w h o

T h e

w a s

h o w

t o

t h e

as a n

t h e

a

call

Sir;

a n d

q u e s t i o n "

f r o m J a k o b

m a k e

o n c e

m e n ,

B e r n o u l l i

i n s t r u m e n t

n e w - s t y l e

a n

w a s

o f

r e a s o n -

a c c e p t

annuity,

a

t h e

t h e

far

II

t w o as

p r e -

against d i d

in

n o t case

descriptive.

B u t

in rational

decision

a b o u t

b e l i e v e

a n d

a n d

t h e

t h e o r y

o r

F r e d e r i c k

i m p r o v e

s o

o f

results

t h e o r y ,

majority

prescriptive,

s e n t

their

w h e n

their

great t o

d e s c r i p t i o n

a n d

t h e o r y

the

a

c h e c k e d

a m e n d e d

p u r c h a s e

t h e o r y

o n

at

w h e t h e r

C o n d o r c e t

calculations

t h u s

instruct

it a b o u t

calculate,

settle

calculus

t o

arose

d e m o n s t r a t i o n .

r e a s o n a b l e

t o

s y s t e m ,

their

M a t h e m a t i c i a n s

" p a r a d o x . "

b e

H e r e

so,

o f

elite

u s

s o o n

probabilists

a t t e m p t i n g

w a s

"Let

s h o u l d

old-style

t h e o r y

also a i m e d

uncertainty,

t u o u s l y

t h e

w e

a c o n t r o v e r s y

a r m s :

w i e l d e d

m a t t e r s ,

as

t o

Classical

P o i s s o n

P e t e r s b u r g

o f

15).

m a t h e m a t i c i a n s

the probabilists

m a t i o n

p.

17

w h e n e v e r

a call

ink,

r e a s o n a b l e n e s s .

t h e

St.

u n d e r

a n d

p r o b a b i l i t y

i n t u i t i o n s

jibe,

1 9 5 1 ,

in u n c e r t a i n

as

replace

p e n

S i m e o n - D e n i s

c o n s e n s u s

H e n c e f o r t h ,

w o u l d t o

[ 1 6 7 7 ]

t h r o u g h

t h e m .

probabilities

t h e

for-

the

t e s t i m o n y

s o m e t i m e s

p r e s u m p -

o f

judicial

Prussia s y s t e m

a

w e i g h t y

( C o n d o r c e t ,

1 7 8 5 ) . T w o m a t e l y

a m b i g u i t i e s , u n d e r m i n e d

matical.

T h e

s p a r k e d o f

b y

s a m e

o n

first

t h e

t h e

p r o p e r

i n g h o w

t o

f e w .

s e n s u s

t o

It

c o n t r i b u t e d w a s

s e c o n d

d ' A l e m b e r t

o v e r

carrying

o f f

L o n d o n .

T h e

F r a n c e

o n

their

as

m u c h

r e p o r t s t h e

t h e r e led

t h e

o f

t h e

d r e a m

o f

a calculus in

T h e

just

e i g h t e e n t h o n e - s e v e n t h

t e c h n i q u e

o f

that w o u l d face

w h e r e

d e b a t e

i n o c u l a t i o n

L a d y

t h e

n o t

a g r e e

t o

t h e

select

o f

in

d e b a t e o f

c o n s e n s u s

o f

believ-

o v e r

t h e t h e

w i d e n

clear

o f

d i d

p e r s i s t e d

m a g n i t u d e

natural

s o l u t i o n s

b e l o n g e d

e n d l e s s

b r a n d s

just

F r e n c h e n l i g h t -

that

c o n -

e v i d e n c e

that

sorts.

c o n c e r n e d

t h e

b o t h

m a t h e -

distinct

m e r c h a n t

ulti-

e x p e c t a t i o n

d i f f e r e n t

probabilists

t h e

tenacity

o v e r

several

v e r y

d e s p i t e

a n d

r e a s o n a b l e n e s s

w e r e

t o

b u t

c o n f u s e d

d e b a t e

s h r e w d

t h e

u p h e a v a l

several

o f

t h e

in

their

as

r e n d e r

faith

s m a l l p o x o f

t o

in

m o n o l i t h i c ,

p r e s c r i p t i o n .

d e c a d e s

r e c o g n i z e d ,

e x p e c t a t i o n ,

a n

their

o f

a n d

H o w e v e r ,

a m b i g u i t y

a n d

m i d d l e

o f

w a s

t o

o n

p r o b l e m :

fair j u d g e

t o o k

d o u b t

d e s c r i p t i o n

t h e

T h e

shatter

N o

early

s o m e t i m e s

eclaires.

it.

r e a s o n a b l e n e s s T h e

t h e y

r e a s o n a b l e n e s s

R e v o l u t i o n e n e d

a n d

d e f i n i t i o n

d e f i n e

clearly

classical p r o g r a m

St. P e t e r s b u r g

o f hommes

that

e v e r

s u r f a c e d

p r o b l e m .

c o m p a n y

in

t h e

r e a s o n a b l e n e s s ,

t h e

n e i t h e r

W o r t l e y

t o

b e t w e e n

d r a m a t i z e d c e n t u r y o f

t h e

t h e

D a n i e l t h e

against

E n g l a n d t h e

b e t w e e n

B e r n o u l l i

r a v a g e d

p o p u l a t i o n s i n

line

difficulty.

s m a l l p o x

M o n t a g u

i n o c u l a t i o n

d r a w

o f

disease,

D u r i n g E u r o p e ,

Paris

a n d

a n d

a n d

V o l t a i r e

l o n g

prac-

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18

Classical

ticed

in

m i g h t a n d

T u r k e y ,

b e

c u r b e d .

t h e r e

w a s

d i e

D a n i e l

B e r n o u l l i

u s e d

t h e o r y for

f r o m

t o

a n y

s u b m i t t e d c o u l d

calculate

g i v e n

o n e

t r e a t m e n t

d a t a

t h e

age.

a

d u b i o u s ,

d ' A l e m b e r t ,

h i m s e l f

R a t h e r ,

v e n t i o n a l

probabilistic

t r e a t m e n t

risk

( i n o c u l a t i o n )

p e o p l e

p r e f e r

t o g e t h e r

i n g

t h e

w h e r e a s t h e

O v e r

in

half b a d . "

B e r n o u l l i

s a w

s l o w l y

prescriptive, a b l e n e s s

a

o f

probabilities.

B y

prohabilites

in o f

T h e s e ,

senses

p r o b a b i l i t y

in

failed

b o t h

t h e

real

a a

o n

a t t e m p t e d

t h e o r y

for

direction,

g a p

small

p u b l i s h e d h a d

m a n y

t o

lay

f r o m

r e a s o n a b l e d i d

b e

w i t h

Essai

b e c o m e

t o

.

1 9 7 9 ) .

probability

ideal

t o

o f

a n d

t o o l

.

reveal

t h e

r e a s o n -

subjective

philosophique a

.

reasonable,

d e s c r i p t i v e

t h e

al-

d e s c r i b -

( D a s t o n ,

o b j e c t i v e

his

n o t

l o g i c

o f

classical

t h e

psy-

s h o r t - t e r m

its task

w i t h i n

b e t w e e n

t h e o r y

t o

c o n -

actual

" c o m m o n

self-interest

e m p h a s i s

t h e

m a t h e m a t i c i a n s

d i s i l l u s i o n m e n t

Laplace

o f

m a t h e m a t i c a l

o f

a

piece.

s t r e n g t h

reflected

o f

t h e

sur

rather

a n d

t h o s e

its

T h e y o f

its

is

subjective

h i g h l i g h t e d a

les

t h a n

a

in

b e l i e v e d

that

applications,

their vision o f the

a b o v e

firmly

t o all

b u t

for

their a n d

b o t h

a n

calculus

m i x e d identifit o

b e

distinc-

probabilists

s u c c e e d e d

applications

t h e o r y a n d its p r o p e r

o f

i n n u m e r a b l e

classical

t h e

s e n s e

that c a m e

its

m a t h -

d e n i e d

t h e

t w e n t i e t h - c e n t u r y o f

o f

o b j e c t i v e

s u b j e c t i v e

rationality

i n d e p e n d e n t

applications,

that

t h e

a n d

o f practical s c h o o l e d

a n d

c o m m i t m e n t

p h e n o m e n a ;

f o r m

t h e o r y a n d

that

o f

d e t e r m i n i s m

s t a t e m e n t s ;

that T o

classical i n t e r p r e t a t i o n

c o n f l a t i o n

t h o r o u g h g o i n g

m o d e l i n g

t h e o r y w i t h

t h e

fruitful

p r o g r a m m a t i c g o a l

all

h a l l m a r k s

c h a n c e

i n t e r p r e t a t i o n s

w e r e

o f

p r o b a b i l i t y

as reasonableness.

p o s s i b l e t h e y

t h e

t h e

the

t h e

a c k n o w l e d g e d

o w n

B e r n o u l l i ' s

t i m e

w e r e

o f

m a t h e m a t i c a l

tions,

t h e

probability;

o f

career,

w i d e n i n g

probability:

o f

k n o w n

t h e

its

a

w h y

Bernoulli's

D ' A l e m b e r t

called

p r o b a b i l i t y

r e a s o n s

e n l i g h t e n m e n t .

e x i s t e n c e

c a t i o n

result

1 8 1 4 ,

t h e n ,

e m a t i c a l

in

h e

o p p o r t u n i t y

w h e r e

its l o n g

w h i c h

s i m p l i f y i n g

Bernoulli's

( s m a l l p o x ) ,

l o n g - t e r m .

o t h e r w i s e

this as a n

risk

o f

S c i e n c e s

i n o c u l a t i o n

his

i g n o r e d

c h o i c e

1 7 6 0

p r o b a b i l i t y

f r o m

that

I n

o f

o p p o s e d

c l a i m e d

a

recipients

so.

a n d

a n d

i n o c u l a t i o n ,

w i t h

d a n g e r s ,

A c a d e m y

principal

p r o b l e m

its

o r

m o r t a l i t y

t h e

s c o u r g e

that

m o n t h

scanty

n o t

t h e

t h e

h e l d

p e o p l e

shifted as

o n

a

t h e

w i t h o u t

c h a n c e

Paris

w e r e

l o n g - t e r m

b e t

h e

p u b l i c o f

a n d

m o d e l

B u t

o f

c o u r s e

o f

that

e x p e c t a n c y

d ' A l e m b e r t

this p r e f e r e n c e ,

c o n d u c t

the

t o

t h e

life

o f

c o n f r o n t e d

a large

effect

b e n i g h t e d

t h e o r y

t h e

a n d

c o n d o n e

half g o o d ,

t o

risk-raking:

o f

s m a l l p o x

w e r e

p r o p o n e n t

c o n c l u s i o n s .

o f

s p a c e

in

n o t

h u n d r e d )

statistics

t h e s e

h o p e s

itself w a s

t o

o n

g a i n

f a v o r a b l e

c h o l o g y

t h e

h a d

a v e r a g e

a

m e d i c a l

t w o

m e m o i r

b e

b u t

in

in

B e r n o u l l i ' s

a s s u m p t i o n s

a n d

i n o c u l a t i o n

( a b o u t

t h e

w h a t

p o p u l a r

H o w e v e r ,

a small

w o u l d

that

f a n n e d

probabilities

subject

o r t h e y

matter.

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C l a s s i c a l

1 . 6

G a m b l i n g l e m s

R I S K

w a s

s o l v e d

t h e

b y

I N

a n d

b l i n g p r o b l e m s ,

w h i c h

t h e

t o

this

first

o f

t h e

e d i t i o n

f r o m

i n v o l v e d

m o s t

o f

t e c h n i q u e s early

c h a n c e

a n d f o r

l o n g

o f

analysis

e e n t h - c e n t u r y

f a c t o r s n i t e

like

e d g e

e q u a l

o v e r

t h e

r a p i d

s t o c k - i n - t r a d e

m i g h t

s t r o n g

d o s e

t h e

folly

o f

o f

d i d

t o

Ferdinand c h a n c e s t e a m

w i t h

o f

E n g l a n d

like

ticians

w i t h

a n d

t h e

G e r m a n

( F r e d e r i c k

II

a b o u t

Prussia's

w a r

t h e

f o r

t h e

o f

w e r e

a l g e b r a t h e

I n t e r e s t i n g l y n o

t h o s e

o f

a s s i g n m e n t

o f

a n d

a n d

u n d e r t o o k s e v e r a l

c a l c u l a t i o n s

g a v e

h a d

m a d e

c h a n c e

m e s s a g e

a n d

t h e n

g a m b l i n g

t e n n i s ,

g a m -

c o m p l e x i t y

bit

e x a m p l e ,

a p p e n d e d

o f

s o m e

a

e i g h t -

o f

t h e

b e t t i n g

t e x t

c o c k s

o f

o f

states a

F a t h o m

v e r y

s e v e r a l

little

t h a t

a

defi-

n o t a b l e

I n d e e d ,

t h e

l o t t e r y

t h e r e

w a s

b u t

w e r e

l e a r n e d

l o t t e r i e s

d i c e

t o

b e

B r i t a i n , a n

t o

r e a s o n

f e w b e

cruelly of

o n

fleeced

t h a t t h e

b y

a in

m a t h e m a -

t h e

d e s i g n e r s

F r a n c e ,

Italy,

o p i n i o n . a n x i o u s

m o n e y

e i t h e r

t h e

b e g a n

s e v e r a l

raise

w h o

all

e x p e r t

E u l e r

m o s t

Adventures

c r a z e

f o r

t o

a

p r e a c h e d

T h o s e

N e i t h e r

i n

w i t h

a p p a r e n t l y

p r o v i d e d

w r o t e

p r o p o s e d little

a n d

m a t h e m a -

" c a l c u l a t e

o n l y

l o t t e r y

E u r o p e

h e

t h a t

The

t o

t h e i r

associations.

likely

S m o l l e t t ' s

p r o b a b i l i s t s

e x c e p t i o n :

c a r d s

w i t h

m a t h e m a t i c i a n s

e m p l o y m e n t .

n a t i o n a l

c o n s u l t e d

f o r

c e r t a i n t y , "

s w e p t

ease

edification.

g u i d a n c e

T h o m a s

a n d

G e n o a n - s t y l e

d e b t s . )

o f

at

h o p e d

m o r a l i s t s ,

e i g h t e e n t h - c e n t u r y

b u t

t h e

t h e m ,

T h e

s o r t

a n d

ill

d i s r e p u t a b l e

p a s s i o n

t h e

for

w e r e

t h e i r

1 7 1 9 ) .

e i t h e r

t e x t s

N e t h e r l a n d s

w a s

a

a r b i t r a r y

o f

a m o n g

t h e i r

e x a c t n e s s

T h e

p r o b l e m s

p a t r o n s

g a m e

w i t h

( 1 7 5 3 ) .

u t m o s t

t h e

t h e

f o r

h e r o

Fathom

n o r

l e t t e r s

t h e

o f

a l o n g

a p p e t i t e

s h a r p s t e r s . a n d

r a t h e r

a n d

( D e f o e ,

p r o b a b i l i t y

t h e

p u r e

p r o b a b i l i s t s

D e f o e

r e c k l e s s

p u r s u i t s

Count

o f

t o

m e t h o d s

1 9 6 8 ) .

o f

F e r m a t ' s

( 1 6 5 7 )

t h e

w h a t

p r o b -

p r o b a b i l i t y

aleae

u s i n g

u s i n g

p e r f o r m a n c e

p r o b l e m s

D a n i e l

t h e

little

d i s a p p o i n t e d ,

a

ludo

m a t h e m a t i c a l

B e r n o u l l i ,

p a s t

m o s t

c a l c u l a t i o n

t h e

a

a n d

d e v o t e d

( 1 7 1 8 ) ,

m a t h e m a t i c s

o f

P a s c a l

first

e l e m e n t a r y in

p l a y

c o n t r a d i c t i n g

a n d

o f

v e r y

o t h e r s .

spirits,

s u c h

h a d

size,

p r o g r e s s ,

c u r e

g a m b l e r s t u r n

c h a n c e s ,

sort.

( S c h n e i d e r ,

c o c k - f i g h t i n g

g a m b l i n g

c r u s a d i n g

ticians

o n

o f

t h e

e x c l u s i v e l y

t h e

g a m e s

J a k o b

a n d

e x p e c t a t i o n

w i t h

p r o b a b i l i t i e s

b r e e d i n g ,

D e s p i t e

S o m e

t h e

albeit

I N S U R A N C E

Chances

o f

o f

t h e

this

s t a p l e

of

analysis

o n

latter.

m a n u a l s

a s s u m i n g

o f

D

ratiociniis

Doctrine

b e t w e e n

skill,

t h e

De

d u r a t i o n

w r i t e r s

d i s t i n c t i o n

p r o b a b i l i t i e s

o d d s

o f

o f

t h e

c o m p u t a t i o n s

N

w e r e

s o p h i s t i c a t i o n

c o m p u t a t i o n s

h a r d - a n d - f a s t m i x e d

t h e

b e

H u y g e n s *

M o i v r e ' s

s i m p l e

t h e s e

t o

A

19

c o n t r a c t ,

w e r e

treatise

c o n t i n u e

D e

a n d

a d v a n c e d

e n o u g h ,

H u y g e n s '

B e t w e e n

p r o b l e m s

a d v a n c e d t o

day.

a l e a t o r y

m a t h e m a t i c i a n s

c o r r e s p o n d e n c e

t e x t s

G A M B L I N G

p a r a d i g m a t i c

t h e

p r o b a b i l i t i e s

side

t o t o

p a y d o

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Classical

20

so.

T h e

traditional

sizable profit p i t t e d that

t h e

t h e y

c o r r e c t

p o o r ,

w h o

bitious. A

t h e

t h e

t o

o f J a k o b

the

d e r i v e d

for

trast

g a m e s

t o

T h i s

w a s

n o t

m a t h e m a t i c i a n G e n e r a l b a s e d w i t h t h e

o f

E n g l a n d .

p r i c i n g

o f

s i x - m o n t h creased

in

t h e h e

h e l p d i d

t h e s e

J o h n in

o f

n o t

D e

revise

G r a u n t ' s

table, B r e s l a u

c o m p i l e d

Statistics births,

a n d

W e s t

a

h a v e

u p o n

t h e

c o m b i n a t i o n s

social

t h e r e f o r e t h e

m a y

tax

o r d e r ,

strategy

o f

a n d

t y p e s

for

i t is

t h e

u n l i k e l y

l o t t e r y

despised

o f

n e p h e w

m a r i t i m e

aleatory

at a m -

t o

in-

b u s i n e s s

w e r e

o f

interest

t u r n e d

their

a b o u n d t h e

T h e

w i t h

s u c h

e x p e c t a t i o n

all g r i s t

for

their

mill.

values

w e r e

n o t

easily

probability

e x a m p l e s

their

contracts.

insurance,

u s u f r u c t s that

for

eagerly

N i c h o l a s

aleatory

Friesland

t o

s i m p l y

a s s u m i n g

that

for

o f

3

H a l l e y

a n d

t h e

contracts, in

o n

c o n -

m a t h e m a t i c i a n

o f

e s t i m a t e s

t h e

d a t a

i n s t a n c e

p e r i o d

d e a t h s

b e c a u s e

m o n e y o f

o f

until

in

t h e

first b y

for

a g e

his

t h e

t h e y

d e -

H e

d i d

a s s u m p t i o n s

H u d d e ,

w i t h

a l t h o u g h

s u g g e s t e d

m o r t a l i t y b e y o n d

t o a n y

80.

m a t h e m a t i c i a n s

truly

w a r

in

a n n u i t i e s

d i r e c t i o n

o f

t h e

d y i n g that

A m s t e r d a m J o h a n n e s

E s t a t e s

e x p e c t a t i o n s

a n d

c h e c k

t h e

a n d

m a t h e m a t i c a l l y

c h a n c e s

t h e o r y

g a t h e r e d

t o o k

raise

t o

r e l e v a n c e

p r o b a b i l i t y

(Halley,

first

equal,

g e n e r a l ,

t h e

t h e

intervals

o f

s t a t e s m a n

p r e s e n t e d

t h e

w e r e

p u r c h a s e r s

I n

D u t c h

calculus

o p p o r t u n i t y

p u b l i s h e d

t h e

5 3

s u b s e q u e n t

1 6 7 1 ) .

e x t e n s i o n s

this

w i t h

n e w

a g e s

t h e

1 6 7 1

H u y g e n s '

r e c o g n i z e

f r o m

in

i m p l e m e n t e d )

f e l l o w

t o

w h o

for

a p p l i e d

W i t t ,

a n d

e n d

o b s t a c l e

his original price

d u r i n g

m a r r i a g e s ,

a n d

W i t t ,

( n e v e r

a n d

Leibniz'

selling

his

r e c o g n i z e d

m o r t a l i t y

E d m u n d

at

f u n d s ,

h i m s e l f

q u i c k t o

a n d

f a s h i o n

( D e

w e r e

annuities,

b e t w e e n

m a y o r

t h e

tickets

i m p r o b a b i l i t y

w i n

d e s p e r a t e

t h e o r y

r e s p e c t a b l e

D e

W i t t

o n

o f

as

a

c h a n c e .

annuities,

data

l o t t e r y

classical probabilists

i n s u p e r a b l e

s c h e m e

avail

w e r e

1 6 9 3

p u r e a n

lottery

T a l l e y r a n d

r i s k / b i g

n e g l e c t e d

i n t e r e s t i n g

J o h a n n

r e c o r d s

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m o r e

a regular

t h e

at o n c e

m o r e

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p e r i o d

n o n e t h e l e s s against

t h u s

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rigidity if

g o v e r n m e n t s

3).

futures,

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t h e

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still g r e a t e r

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w h o

t h e

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t h e s e

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inheritance,

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applications:, w i n e a n

t h e

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o f

this

m a t h e m a t i c s

w r i t i n g s

6 ) .

l e s s o n s

1988,

F e e l i n g in

that

either

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majority

w i n n i n g

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1 7 8 9 , p.

f e w

o f

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p a y - o f f

alter their s i t u a t i o n

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d e m o g r a p h i c

i n f o r m a t i o n

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as

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probabilists,

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several

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( 1 7 2 5 )

t h e s e

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annuities,

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readers,

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statistical

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t h e y

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t h e

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contracts.

calculating

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t h e m i d - e i g h t e e n t h

e x p e c t a n c y ,

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aleatory

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a n d

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t h e

i n e q u i t a b l y

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issues

w i t h

t h e m

o f

u s e

like

m a t h e m a t i c a l l y

in

1728.

t h o r o u g h n e s s

u n h e s i t a t i n g l y

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c e p t u a l

a n d

1 9 7 1 ) .

s a w

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led

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n o t h i n g

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g u e s s w o r k

H u y g e n s

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21

register

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22

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t o o k

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t h e

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h i m ,

for

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m a t h e m a -

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1898,

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89).

m a t h e m a t i c s

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Christiaan.

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empirical

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closely

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all

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e a c h

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in

annuities,

5 7 - 6 9 ) .

o n

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h e

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18 years, 2 m o n t h s .

b a s e d

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probabilistic

n u m b e r

n u m b e r

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probabilities

h i g h

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like

It w a s h u g e seas.

a n

regular

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fires

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subject

t o

G r e a t

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Classical

t h e o r y data

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o n e s ,

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sufficient

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inevitability,

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particularly

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a n d

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s h i p w r e c k ,

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easy

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character

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s o

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a g e

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p r o m i s i n g

c a t a s t r o p h e s :

d u l y r e c o r d s

w e r e

p o s s i b l e

m a t h e m a t i c s

search in p r o b a b i l i t y g a m b l i n g

o n e

b e

m a d e

B i b l e

w e r e

o n l y

s u g g e s t i v e .

a n n u i t i e s

t h e

a

trace o f

Halley.

it a m o r e

e s c a p e

e x p e r i e n c e

vessel, o r

a g e - l i n k e d

t h e

t h e

t h e

h a v e

1 7 5 0

is

rather

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c u s t o m

material

e v e r y w h e r e ,

B y

it

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c o n t i n u o u s

m i g h t

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regularities b e e n

in

A l t h o u g h

a n d

o f

f r o m

h a v e

m o r t a l i t y

o t h e r

t h e

o n e

l o n g

it

A n d

also a candidate,

b o t h

m a d e

a c o m p l e t e

b u i l d i n g

fires?

h a v e o r

w i t h

l u c k

I n d e p e n d e n t it

result

fires

variable: e v e n

W a s

t o

c o u r s e ,

t h a n

c o n n e c t i o n

possible,

s u r v i v e d .

bility

s e e k e r s

all. T h e r e f o r e

i n d e p e n d e n t

t h e

a r g u e d

regularities

is n o

t h e

W i l l i a m

t o

there

o n l y

fit

s e e m

r e c e i v e d

a n d

t o

like

w h o

n o t

c o m p e n d i u m

natality

w a s

d o e s

f r o m

a n d

c o l l e c t e d

adjusted

alleged

available

regularities.

o f d e a t h . W i t h t o

e v e n t s .

c u r v e

T a k e n

t h e

t h e o l o g i a n s

u p o n

w i t h J o h n

that

data w a s

G e r m a n y

G r a u n t

S e x e s , "

aspects o f m o r t a l i t y m a y

for

in

case

o f t e n

N a t u r a l

probability,

w o r k s

B o t h

t h e

regularities.

P r o v i d e n c e

o f

t h e

w a s

t h e o l o g y

s u c h

in

h a n d

B i r t h

it

S u s s m i l c h

O b s e r v e d

G o d ' s

t h e

closely.

in

b e g a n

for D i v i n e

a n d

natural

b e l i e f

n o t

contrary,

eagerly seized

b u t

in D e

in

t h e

a n d J o h a n n

23

It w a s

p o s i t e d ,

p r o v i d e n c e

birth a n d

t h e m e

century.

regularities; o n

regularities

original

ring

e i g h t e n t h

regularities

h y p o t h e t i c a l

t h e

t h e

probabilities

in t h e

o f

t o re-

f r o m latest

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24

Classical

m o r t a l i t y t h e

table

Paris

t h a n

in

w h a t

" a c a d e m i e s

d e

jeu." A n n u i t i e s

s u r a n c e

-

s o

as h e

l o n g

regular his

t h e

a n n u i t a n t (or

a t t e n t i o n

tract

that

m o s t

r e f i n e d

t o

o b s e r v e d

u s e

that

" o f

T h e

for

their

"the

clerks

w o r d s

a p p e n d i n g

a n d

t h o u g h

the

aleatory m a k e ling

t h e m s e l v e s trade

in

a n d

w a s

sellers

p r o b a b i l i t y

glance

o f

m a t i c i a n

o f

L o n d o n

i n s u r a n c e M o s t

regardless

o f

m a n u a l s

i n f l u e n c e

o f

s o

a n d

w e r e

reluctant

in

the

o f

avail

t h e m

o f

vol.

o f

G r e a t

II, p p . as

t o

v i i -

w e l l

t h e

i n t o

calculations.

probabilists

A l -

o t h e r

h o p e d

r e f o r m i n g

as

barely

m a t h e m a t i z i n g

b y

t h e

e q u a t i o n s

o n e r o u s

t h e

a n d

D o d s o n

affairs

t h e

c o n -

rationalizing

estates"

m a n u a l s

f r o m

t u r n e d

1 7 5 3

1 7 7 5 ,

their

t h a n

b y

w i t h

a n d

T h e i r

t h e

t o

bust-

a n d

a n

that

t h e

o f

t h e m s e l v e s

d i d

t a k e

a

a n d

o f

size o f

risk

o n

e i g h t e e n t h insurance, t e c h n o l o g y

b y

for

24ff).

f r o m

flat

o f

a g e

statistics

a n d

practice

l a w

o f

t h e

w i t h o u t rates, d i d

s o

m a t h -

o f

their m e m b e r s h i p . t h e

t h e

m a t h e -

years

t h e

first

p p .

c h a r g e d

f r o m

insur-

t h e

1 9 6 2 ,

a c c o u n t

m o r t a l i t y

o f

S o c i e t y

t w e n t y

first

t h e

s c e p t i c i s m

s o m e

at

A m s t e r d a m

Y e t

t h e n

( O g b o r n ,

p r o f i t i n g

t h e

s e e m s

a s s o r t m e n t

p l a n s instead

f r o m

t h e o r y t h e

1 7 6 2 ,

i n t e r e s t e d

a n d

E q u i t a b l e

a n o t h e r

available

Far

o f

L o n d o n

universal

w e n t

m o r e

a d v a n t a g e .

insurer

a l m o s t

n o

i n d i f f e r e n c e

a m o t l e y

in

e i g h t e e n t h - c e n t u r y

w e r e

percolating

life i n s u r a n c e f e w

large,

i n s u r a n c e

o n l y

a n d

subject.

m o s t

a n d

this sort, t h e

dealers in a n n u i t i e s a n d t o

real

m e n

r e a d e r

B y

life

established

c o n s u l t i n g

for

for

c o m p e t i t i v e

m a t h e m a t i c a l nil

t h e

p r o s p e r o u s

annuities

for

t h o s e

t h e

o f

in

u p o n

aleatory

a b o u t

in-

m a k e s

also

statistics

business:

( D o d s o n ,

t h e

societies strictly l i m i t e d

t h e

effectively

o n

w i t h

o f

in

p a y m e n t s

beneficiaries

A r m e d

set

o f life

h o l d e r

D o d s o n

translating

g a m b l e r s .

c o m m u n i t y ,

w i t h o u t

t h e s e

W h y

o f

m e t

a n n u i t y

age,

n u m b e r s ,

t h u s

w a s

p r o j e c t

imitators.

e m a t i c a l

t h e

e n t e r p r i s e

rather

t h e

J a m e s

insurance,

a n d

particularly

Lives,

I n d e e d ,

a p p a r e n t l y

t h a n

b a s e d

D o d s o n

spare

realized.

s c r a m b l e d

m a t h e m a t i c a l l y

his

o r

lives."

p u r v e y o r s

s c h e m e s

t o

p o l i c y

variety

p i t c h e d

p e r h a p s

annuities

t h e o r y

w h e r e

A s s u r a n c e

o f

t h e

s e c o n d

h a n d b o o k s

m a r i t i m e a n d

regular

p a i d

part

p r e v e n t e d

s e l d o m

inexplicable,

m a r k e t s

t o

for

b i g

arithmetic,

tables

u s e f u l

w a s

lives"

T h e y

o n l y

like

o f

w r o t e

statistics

"values

h o p e

b u y e r s

a n c e

o f

c o n t r a c t s

T h a t

in

w i t h

lack

v a l u e

r e t u r n

probabilists

it

W h i t e ' s

o b v e r s e

like

tables.

like

t h e

lives;

this

t h e

clubs

s i m p l y

in

s u m

g r e a t e s t

colleagues.

n u m e r a t e

s u m

o f

A n d

t h e

m a t h e m a t i c i a n s

treatises

w e r e

a l u m p

t e c h n i q u e s , taking.

o n

L o n d o n

p e r s o n )

m o r t a l i t y

m u c h

d e p e n d e d

for

in

m a t h e m a t i c i a n s

o f

risk

l u m p

m a t h e m a t i c s

analytic o f

a

o n

d e s i g n a t e d

r e t u r n

t h e

w e n t

p a y s

s o m e

m a d e

b u s i n e s s

Britain

in

H e n c e

their

viii).

s o m e

p a y m e n t s

d e a t h .

t h e

probabilities

risk

large T h e w a s

century. n o t

t o

m e n t i o n

c u s t o m - m a d e

g a m b l e r s , ( a n d

o f t e n

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Classical

c u s t o m - w r i t t e n )

for

o f

m i n d l e s s

irrationality:

s u p e r i o r i t y r e c o g n i z e

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in

t h e

this

n e w

probabilistic

"the

P r o j e c t i n g

e f f l o r e s c e n c e c r o o k ,

b y

Lotteries, w h o

a n d

l o t t e r y

m a y

T h e

b e

b y

t h e

cash

e v e n

six

v e r y

v e r y

s u b v e r t e d

t h e

o f

t h e

lifetime

o f

life

a l m o s t

a celebrity

n o t

p e r s o n a l l y

o r

a n c e

t o

resisted e m a t i c a l

f u t u r e

policies

w e r e t h e

o f

o f

l o t t e r y

p r o b a b i l i t y

still

a n d

a n d

X V ' s

it

a

a c q u i r e d t h a n

o u t m a d e

v e r y

legal

c h e a p l y

n e e d

t h e

w a s

o f

q u i c k financial

a n n u i t y

as

t h e

o f

a

b u y e r

-

century. t h e

mistresses.

in

life

o f

T h o s e

a l m o s t

all

flourish

in

life Sir

w h o

life

e x a m p l e ,

t o

L o n d o n

t o

p e r s o n ,

for

b a n n e d

c o n t i n u e d

f r o m

earlier, a third

a

w e r e

also d e d i c a t e d

a n d p o s s i b l y life

5 %

t h e r e -

T h e s e

o f

bit

t e c h -

m o r t a l i t y statistics

as little i n t e r e s t e d

insurR o b e r t

t o o k

in p r o b a b i l i t y

o u t

t h e o r y

tickets.

d e e p e r

r e a s o n s

t h e o r y o f risk. statistics,

t h e

t h e probabilists.

w h e r e

e i g h t e e n t h

L o u i s

in

1 9 2 8 ) .

t h e

w i t h

s o l d

seller,

s u m m a r i l y

e v e r y t h i n g

m a r i t i m e

o n

t h e

usually

m a t h e m a t i c a l

c o n t i n g e n c y

o f o n

w e r e

o t h e r ,

annuities,

o f

b o o k

it w a s

o n

t h e y

t h e

t h e m .

g o e s

interest,

p u r p o s e

c e n t u r y ,

at

o f

s o l d

t a k e n

w e r e

at this t i m e

a c q u a i n t e d

s u c h ,

o f

t h e

b u y e r , a n d

a w a g e r

E n g l a n d ,

m o s t

s u c c e s s i o n

p u r c h a s e r s

T h e r e

bling,

m a d e the

A s

e x c e p t

t h r o u g h o u t

b e t t i n g

t h e

s o v e r e i g n .

c o u n t r i e s

offices

W a l p o l e

a

a l w a y s

o f

m e r c h a n t s

loans at m o r e

( C a m p b e l l ,

s i x t e e n t h

w a s

rate

o r

Societies,

o n e

b u t

t h e

h o o k

probabilistic

a n n u i t i e s

annuities

t h e

p o l i c y

t h e

original

t h e

after

h i g h e r

e n d s . S i n c e

f o r m

t h o s e

for

t e r m s

b y

his

t o

l o s i n g

n o t

i n v e s t m e n t ,

L o n d o n

t h e

life

w a s

o f

c e n t e r s

called

F r i e n d l y

w a s

n e g l e c t

o f

M a n y

o n

u n f a v o r a b l e

clearly

i n s u r a n c e

o f

testifies

i m p r o v e

life

c e n t e r s

D e f o e

( 1 6 9 7 )

inertia

t o

t h e

e v e n

contract:

p u r c h a s e )

D a n i e l

b u t

difficult

also

a n d

d i f f e r e n t

E u r o p e a n

as

t h e

w e r e

case

m a n i f e s t

b u s i n e s s

c u c k o l d r y ,

f o r m

m u c h

h o w e v e r

L o n d o n

Life i n s u r a n c e

cardinal

s u c h

a

t h e

T h e

s o relevant.

o f t e n

this

o f

at

is

A s s u r a n c e s ,

g e n e r a l

u s u r i o u s .

t o

facie

8 - 9 ) .

n o t

i n s u r a n c e

a

t h e

t h e m

w h i c h

a n d / o r

p p .

a n d

a n c i e n t

l o a n s

years'

o n

a n n u i t i e s

a n

n a t u r e

o f p e n s i o n

t h e r e f o r e

w e r e

1 6 9 7 ,

a prima

Projects

S t o c k - j o b b i n g ,

e x p l a i n i n g

d e c l a r e d

a r r a n g e m e n t s k i n d

w h i c h

essentially

at

m o n e y

in e i g h t e e n t h - c e n t u r y

aleatory

( m o s t l y

m a k e

It

s e e m s

i n n o v a t i v e

on

things,

o f

b l i n d e d

Essay

m a n y

A n n u i t i e s

w e r e

o w n

s o

applications.

fire,

n i q u e s .

after

t h e s e

against

t o w a r d s

w e r e

t o

d o

A m s t e r d a m ,

i n s u r a n c e

in

f u n c t i o n

a n d

his

S t o c k s ,

a c c u s e d

t o

b o o m i n g ,

( D e f o e ,

c o n t e x t

interest

a n d

25

m e t h o d s .

L i k e "

f u r t h e r

a n e w

t h e

in

s c h e m e s

the

i n v e n t e d

m a t h e m a t i c a l

research

" B a n k s ,

failure

c o n s e r v a t i s m

L o n d o n

A g e "

o f

T h e i r

d e s c r i p t i o n

e i g h t e e n t h - c e n t u r y for

t h e m ?

probabilities

basis

o f

W h e r e a s

L o n g

parties

i n s u r a n c e

w h y

practitioners

b e f o r e

t o

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h a d

a g r e e d

i n t u i t i o n s t h e

t h e

that

ran

t h e

a d v e n t

c o n t r a c t s u p o n

t h e

directly

dealers in risk a c t e d

o f

o f like price

risk

m a t h g a m o f

c o u n t e r

as if t h e

a t o

w o r l d

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26

Classical

w e r e

a m o s a i c

ticular

o f

i n d i v i d u a l

c i r c u m s t a n c e s

p r o p o s e d

a w o r l d

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data

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F o r

t h e

r e q u i r e d

a n d

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in

trade t h e

-

w i n t e r

r u i n e d

o n

m a r i t i m e t h e y

insurer

c o n d i t i o n

o f

t h o r o u g h o n

t o

annuities

astatistical; case

t o

t h e

e q u a t e d

n u m b e r s

i m p l i e d

r u m o r s

o f

that

m o s t

that

o f

t h e y

if

at

c o n t r a c t s

m e n t

t o o k

their

all

w e r e o v e r

interest

o f in

t h e

ture

tradition

a l o n e

carried

f o r

t o

o f

t i m e

o f

t h e

n e w

h a d in

jurists.

e v i d e n c e , o w e d

t h e

d i v i n e

N

area

D

is

u r g e

T h e

W r i t e r s s i m p l y

i n d i v i d u a l

c h a n g e s

certainty, apparent t h e o r y

t h e r e f o r e a n d

a

p r a c t i t i o n e r s

w i t h the

a n d

n o t

t h e

t h e

t h e flux.

o f

p e r h a p s

t h e

in

beliefs

risk n o t t h e y

o f

C A U S E S

a p p l i c a t i o n

T h e y

particularly m u c h

t o

t h e

historical

S e v e r a l

o f

t o

cargo,

u n f o r e s e e n

t e c h n i q u e s

A

t h e

m a t t e r s

w a s

o n

t e r m .

o t h e r

1 9 8 7 ) .

f r o m

c l a s h e d

it

c o l d

e v e r y

t h e

risk

t i m e

their

j u d g m e n t

m a t h e m a t i c a l

o n l y

I n

g o o d

f o c u s

e q u a t e d

a n d

o n

e x c e p t

a c c e p t

t h e

subject.

its

b r o u g h t

w o r l d ,

o f

risk in question.

l o n g

t h e

a n o t h e r

s i x t e e n t h - c e n t u r y

r o u t e ,

o f

m a t h -

u n u s u a l l y

p r e m i u m s ,

the

o n e

en

thirty-year-old;

advice

t h e

o n l y

t h e

s t u f f

t h e

t h e

O n l y

in

W h a t

underlying

n o t

w a s

that h e l d

ailing

practice

t h e

also

v e r y

t h e

L e v a n t ;

o f

price

a n d

life insurance,

regularities

t h e

w i t h

risk

as

detailed

etc.

T h e

o f

t h e o r y

cancel

s e a s o n ,

c o u l d

( D a s t o n ,

miracles.

a p o l o g i s t s

ture

t h e

pirates,

a c c e p t e d

e x a m p l e

C a t h o l i c a n d

o f

probabilists

risk

inspirations

spectacular lore

o f

the

e q u i p p e d

w o u l d

t h e

t h e

subject

E V I D E N C E

t o p r o b l e m s

C h r i s t i a n

t h e

revealed

1 . 7

A l t h o u g h

t h e

o f

par-

o f

rules

A l t h o u g h

full

n u m b e r s

c o n c e p t i o n

slowly,

early o n

w e r e

minutiae

large

c o n d i t i o n s ;

n e w

probabilists

t o

v i n t a g e .

uncertainty,

practitioners

A l e a t o r y

w a y

antistatistical

w i t h

surprising

t h e

that

o u t l i v e d

p o s i t i v e l y

large

s o

w h o

o n

t o

m a t h e m a t i c i a n s

r e c k o n i n g .

v i e w e d

w a s

it

case

w i t h

a c c o u n t

these

t h e

j u d g m e n t

year's

t h e

m a t h e m a t i c a l

cases w i t h

o n

a c c o r d i n g

that a n y o n e

i n d i v i d u a l

insurance

ship,

n e g l e c t

a

in

advice.

crucial

r e q u i r e d

beliefs, a n d

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Classical

w i t h o n

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t h e

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c r e a t e d

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w a s

t o

rational find

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r e p r e s e n t i n g mathematica lished t h e

a n

o f

1 7 1 3 , a

w o n d e r

t h e

w h o l e

d i d

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s a m e

in

o f

t h e Ars

t h e b y

f o r m s

veracity

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probabilist d o o m e d

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Pierre

b y

a n

1 7 1 3 ,

m a t h e m a t i c i a n s

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t h i n g s ;

c o n s i s t e n c y

a

o n

" m o t i v e

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f u n c t i o n J o h n

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"space" principia

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p u b -

a n a l y z e d

1 6 9 9 ) .

J a k o b

a t a n g l e d

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conjectandi

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t h e

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a n d

f l o u n d e r e d .

B e r n o u l l i ,

"infinity

intrinsic

b y

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b o t h

for

p r o b l e m

probabilists,

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( 1 7 1 3 )

Bernoulli's

t h e

christianae

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o f

D a v i d

w i t n e s s e s

t h e

a

1 9 8 1 ) .

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internal

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conjectandi

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t h e

s u s p i c i o n "

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b e t w e e n

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natural

m a n y

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first

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h e l p e d

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t r e a t m e n t s

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history;

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o n e

a n d

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singular

this t o p i c

e x p e c t a t i o n

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for

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suspect.

natural

b o t h

e v i d e n c e

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his

year

t h e y

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t h e

a

nature,

Francis

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( p r o b a b l y

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t h e

sifted

"velocity

p r o p o r t i o n " past

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sorts

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ii-iii).

as

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" m i x e d "

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e n t e r p r i s e

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I V

f r o m

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b e c a m e

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o f

particularly

resort

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f r o m

o p i n i o n

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v a r y i n g

assent"

article

part

IV.

t h e

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s i m p l y

d e r i v e s

d u l y

o f

d i s t i n c t i o n

probabilities.

o f

In

t e r m s

c o m p u t e d

N o

trary

in

" p u r e "

a s s u m e d b e

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legal

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e l a b o r a t e

i m p e l l e d

b e g a n

B e r n o u l l i ,

belief in

i n t o

a n o n y m o u s

p r o b l e m

sition

t o

a n

( 1 6 9 9 ) .

B e r n o u l l i

jure

t h e m

w a s

m a t h e m a t i c a l

t w o ,

o f

rules

a n d

w i t n e s s e s

in

b u t

d o u b t

a t t i t u d e

fable

y a w n s

literature

e v i d e n c e

t h e

w o u l d

t h r e w

o f

w a s

a n d

T o l a n d ,

integrity,

m e a s u r e s

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C r a i g

o f

fact

for

t h e

miracles

c h a s m

t e s t i m o n y .

n u m b e r ,

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trick

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v e n e r a b l e

extrinsic

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D e i s t

a n d

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t h e

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e v i d e n c e .

o n

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miracles

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extrinsic

b o r e

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r e v e r e d

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a n d

that

s e v e n t e e n t h

c h a n g e d

i n t e n t i o n s ; J o h n

t h e

p h i l o s o p h i c a l

c u e

a g e

miracles.

m o r e

this

b e t w e e n

m a r v e l s

idea his

f r o m

the

c o n c e p t i o n s

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p r o m i s c u o u s

t e x t s

t r u s t w o r t h i n e s s

N e w

t h e

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t o

that

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f a m o u s

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t o o k

t h e

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o f

biblical

p y r r h o n i s t s

o f

a c c o u n t s

ridiculed

c o m e t s

a n d

27

D u r i n g

e m e r g e d

n e w

sense

d e c l a r e d

against

original.

p r o b l e m .

as w e l l as a h e i g h t e n e d lar

that

t h e

m e t h o d o l o g i c a l

o f v a r i o u s

pristine

h e r m e n e u t i c s

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probabilities

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w i t n e s s ,

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1 7 1 3

o b s c u r i t i e s "

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9 ) . o f f

arbi-

P r e f a c e ) . face

t h e

p r o b l e m s

o f

q u a n t i f y i n g

t h e

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28

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p r o b a t i v e w i d e l y a n d

f o r c e

h e l d

w r i t t e n

m u c h ?

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-

a n d

i n t o

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l i n g e r i n g

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o f

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t h e

m i r a c l e

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p p .

9 8 - 9 ) .

t h e

m o r e

w a s

l a w s

t h e far

H u m e

also

for

m a r v e l s

e x t r i n s i c

b y

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(Price,

a c c e p t e d

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causes. w i t h

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n o v e l

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t o

t h e

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critics,

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u n d e r l y i n g

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e x p e r i -

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causes,

m e t h o d t h e

o f

p h i l o s o p h y

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f r o m

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i n v e s t i g a t i o n :

f o r m e r

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e x t r i n s i c

p a s t

n a t u r a l

o f

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a n d

f r o m

a d m i t t e d

o f

t r i e d

belief.

t h e

i n

o f

b u t t r e s s

a n d

e v e n t s ,

p r o b a b i l i t y ,

t o

-

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this, a n d

m i r a c l e s

r a t i o n a l

1 8 3 7 ,

t h e i r

t h e

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intrinsic

a

a r g u m e n t

like

i n t u i t i o n s

t o

o f

a n n i h i l a t i o n

p o i n t ,

d e r i v e d

as

k e e n e r

r e c o g n i z e d

o f

m a k e

P o i s s o n

( P o i s s o n ,

t h e

o f

t o

e v e n t .

t h e

w a s

z e r o

d e f i n i t i o n

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g r o u n d s

essay

s i m p l i -

reliable,

a n

s e v e n t e e n t h

f r o m

really

calculation.

b y

s o

late

t o

w e r e

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p e o p l e ,

t h a t

n e w

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t e s t i m o n y ,

i n t r i n s i c

t h e

p h e n o m e n a

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o f

a r e

s u c h

o n e ' s

p r o b a b i l i t y o f

n e w

u n d a u n t e d

f o r

t h u s

d e f e n d e r s

d e g r e e s

t h e

drastically

sincere,

e v e r y d a y

classical

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s o

a s t u t e

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n a t u r e

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B u t

e x t r i n s i c

o f

t h e i r

Price,

a b o v e

p r o d u c e

p r o b a b i l i s t s

t h a t

d e d u c e d

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his

a s s u m p t i o n

b r a n c h

m o d e l

effects

t o

o f

m o r e

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2 2 6 - 7 ) .

t h e

i m p o r t a n t H e r e

b y

t h e

s t r o n g

f r o m

g u i l t - b y - a s s o c i a t i o n

R i c h a r d

p r o b a b i l i t y

m u l t i p l i e d

as

H i s

d i v i n e

u n d e r l y i n g

a r g u m e n t

c r u x

e v i d e n c e .

1 8 1 1 , p p .

c o n c e i v e d

a n o t h e r

t h e

u p o n

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w o u l d

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b e f o r e -

t h e

m a t t e r s

o f

t h e

p r o b a b i l i s t i c t o

o f

w e r e

m i r a c l e s

t h e r e f o r e

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b u t

U n i t a r i a n

t h e

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-

clearest:

r e j e c t i n g

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i m p r o b a b i l i t y

t h e s e

p r o o f

p r o b a b i l i t y

b e y o n d

w i t n e s s

c o n v e r s e d

s u c h

h o w

t h e o r y .

p r o b a b i l i t y

n o

o n

p r o b a b i l i t y

[ 1 7 6 7 ]

a n d

r e c o m m e n d

h a d

i n t r i n s i c

e x t r i n s i c

t h e

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t h e

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t w o

p r o b a b i l i s t s

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-

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w e i g h t e d

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o f

h a d

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n u m b e r

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t r a d i t i o n

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t o

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at

a l m o s t

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t o

h a n d

t h e

o v e r w h e l m i n g as

t w o

m a t h e m a t i c a l

h a d

credible;

o f

a s k i n g

n a t u r e ,

h a l l u c i n a t i o n

a n d

in

o r a l

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classical

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a p p e t i t e

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o l d

c o n s i d e r a t i o n s

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in

t h e

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o f

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this

t o

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a p p l i c a t i o n s

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probabilities

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C l a s s i c a l

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1 9 7 4 - 7 6 ) .

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first

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calculator.

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a s i m p l e

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a n d

d e v e l o p m e n t

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gradually

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s a m e

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1 9 3 3 ) .

d e s i g n e d

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print)

for

father

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w a s

t o

situation

m a t t e r s

in

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rule

reject a h y p o t h e s i s ,

data

s u c h

w h i c h

R i d e r ,

d i m e n s i o n

tests, t o

b e t t e r

r e c e i v e

j u d g m e n t s

p u r p o s e

u n d e r s t o o d

nificance a n d

t h e

Peirce,

m a k e

t h e

t h e

t h e

o n e

u n u s u a l

o f

o f

o t h e r s . W a s

disinclined

n e c e s s i t a t e d

cases

t h e

o f t e n

e x p e r i m e n t e r / o b s e r v e r

t h e

1 8 5 2 ;

w a s

u s e d ,

a p p e a r e d .

t h e

" W h a t t o

scientist

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in

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t h e

o f

1 8 2 7 ) .

a n d

labor

w i t h

p a g e s

c o m p a r e d

subjectivity

j o b s

t h e

intuitive

s o

that

it n o t

least

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o r

clear

w a s

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a s k e d

scientific

w e r e

t h e

e l e m e n t s

d i f f e r e n c e s

a n d

f r o m

h e

rest,

i n c u r r e d

h o w e v e r ,

m a k e

rules

private

tiation habits

has

n e e d

d i v i s i o n

ing,

recalculate

in his a n s w e r

o n e

h a d

smallness

t e c h n i q u e

e r a d i c a t e d

c o m p a r e d

m a d e ,

a d e v i a t i o n ?

t o

c o n t r o l

t h e

i n d e p e n d e n c e

subjective

b e c a m e

a s t r o n o m e r

1 8 2 7 ) .

a n d

it

O b v i o u s l y ,

statistical

s e c u r i n g

laid

large

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t h e

( t h e

vividly

1 9 7 2 ) .

c o m p l e t e l y

residuals

t h e y w e r e a n d

n o t

b e e n

u n u s u a l l y

d e v i a t i o n s ,

t o o

h a d

83

e x p e r i m e n t a l

that

b e e n

o f

m o s t

a n d

large

s e e m e d

m e a s u r e m e n t s

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G a u s s

b y

e s t i m a t e s )

w h e n

o n l y

particular

h a d

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residuals w e r e

n o t i c e d

t h e

F l a m s t e e d

a n d

cause

indicates

t h u s

e r r o r

e m p i r i c a l m a d e

in

experts

( Y o u d e n ,

e x a g g e r a t e d

1820,

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m o r e t h e

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r e m a i n i n g a strict

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m e c h a n i z e d m e a n s ,

o n e s .

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t h e y

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as in Fisher's

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84

The

w h o l e

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a

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t h e

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aspects. p o s s i b l e

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s i t u a t i o n o n e

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already

a

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c l o s e

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causally

g e t t i n g

b e g i n n i n g

s e p a r a t i o n

f r o m

causal

o c c u r r e d . I n

e x p e r i m e n t s

c o m m e n c e d

e x p e r i m e n t

h y p o t h e t i c a l

h a v e

m e d i c i n e .

plots.

general is

s t r o n g e s t

a n d t o

o n l y

traditional

t h r e e

e x p e r i m e n t a l

w h o s e

a p p l i e d

w a s

s t a t e m e n t s .

situations. o f

b e e n

i n f e r e n c e s

o f

synthesis,

p h y s i o l o g y ,

F i s h e r

T h e i r

e x a m p l e s

tradition,

d e s i g n

c o m p a r a t i v e

o f

i n c r e a s i n g

statistical

w h e n

m e t h o d o l o g y

p l a c e at

h a d

1 9 1 0 .

for

h i s t o r i c a l

a g r o n o m y ,

c o n t r o l

w o u l d

t h e m ,

e x p e r i m e n t a l situation.

t h e

t o

t o

t h e

h y p o t h e t i c a l

situations

t o

m a k i n g

l o n g s t a n d i n g

statistics

a d i f f e r e n c e :

e f f e c t

a

e x p e r i m e n t a l

a

m e a n i n g

s o m e

Fisher's

in

desire

invaluable

o f

o f

a r o u n d

e x p e r i m e n t a l

is a b s e n t , m e n t s

p l o t

J o h n s t o n ' s as a n

b e e n ,

t o o .

m a y

analysis.

m o r a l

since

w e

h a n d b o o k

s u p p r e s s i o n

o f t e n

t h e

a d v a n t a g e s

in

as

a

tradition

t e s t i n g

data

t h e

h a v e

h o n e s t

less

t e s t i n g

a n d

statistics

o n e

m o r e

w e r e

Fisher,

b y J o h n s t o n ' s

s a m p l e B y

a n d

p r o b a b i l i t y

o n

o f

" T h e

S q u a r e s

[ D J i s h o n e s t

e m b o d i e d

significance

related

t h r o u g h

e m p h a s i z e d

e x p e r i m e n t s :

B u t ,

G o s s e t

statistical

n i n e t e e n t h - c e n t u r y

h a p p e n s

a t t a c h m e n t s

b e f o r e

o f

m e t h o d s

o f

a w e l l - d e v e l o p e d subjectivity,

I f

has t o g o

characteristic

o f

i n d i v i d u a l

a n d

h e

c o m p o n e n t

also

as

t h e

Least

. .

disciplinary just

o f

discrepancy.

outlying o n e

f r o m

h i s t o r y

o f

1 8 9 5 ) .

m a i n

w a s

t h e

b e c o m e

calculations.

o t h e r

m e a s u r e

rules, s o

derives

in his p r o f e s s i o n .

C o m p a r a t i v e

T h e

t o

w h e n

m e t h o d s

d o i n g

a

objectification

i m p o r t a n t

s t a n d a r d i z e d

nature:

also

p r o c e d u r e s

this

t h e

t h e

socialization

a u t h o r

u n d e r s t o o d

moral

as

m e c h a n i c a l

century,

is c e n t r a l

e x p e r i m e n t a l

u s i n g

o b s e r v a t i o n

f o r m a l

I n d e e d ,

It is t h e

J o r d a n ,

experts

is r e j e c t e d as a r o g u e , a n e v e n m o r e

d e v e l o p m e n t ,

1 9 8 7 ) .

t h e

inference

actual

t h e y h a v e T h e t o

art

this

trials c a n

t o o f

ideal all

similarity.

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b e

The

Especially in

t h e

t e e n t h

c e n t u r y

s l o w l y

e m e r g i n g

t h e

century,

troversial t h e

t w o

b y

t h e

G e r m a n

fluke,

b u t

o u s t e d

b y

b e g a n

o f

t h e

t h e

t o

test

m a y

w h a t

Fisher's

e r r o r

t h e o r y

a n d

tacit

t o

agricultural

t h e

tradition

e x p e r i m e n t a l

o f

variance,

r a n d o m i z a t i o n s o p h i s t i c a t e d

t h e

little

in

c e d u r e s b e f o r e

a

d e c i d i n g

t h e

in

a n d

R.

A .

3).

t o

w a s

a n d

a

W e

o f

part,

-

find

o r

E x p e r i m e n t a l

d e s i g n

agricultural

F.

J.

a n y

t h e

associate

O n

o n

t h e

o t h e r

t h e s e

p r o b -

m o d e l s ,

analyses,

studies,

agri-

e m p h a s i s

o f

h a d

for-

in

n o w a n

M .

o f

already w e

that

a p p l i c a t i o n

statistical

factor

literature,

b o d y

blindness.

n o

n o w ,

material,

that

f o r m u l a t i o n

tradition

n o

o r i g i n a t i n g

t h e

i n c l u d i n g

i n v e s t i g a t o r

t h u s

E n g l a n d .

t h e m e s

Fisher

Certainly

R o t h a m s t e d

statistical

w a s

c o n s i d e r a b l e

learn.

e x p r e s s i o n s

o f B u t

this

literature

t h e o n

analyze t h e

o f

t h e

i n s i g h t

are

set

o f

t o

data

insisted

o n l y

natural

data

M o r e o v e r ,

t h e

c o m p r i s e s

G e r m a n in

a

o f

it p r o v i d e s .

e x p e r i m e n t s .

d e s i g n

a d d i n g

data

t h e

d e s i g n

q u e s t i o n

Fisher, w h o

d e s i g n

reveals

the

o b t a i n e d .

a b o u t

that w h o l e

p r o c e s s

m u l a t e d

t o

correlations

analysis

h o w

e x p e r i m e n t a l

p.

h a v e

b e t w e e n

w e r e

c o n c l u s i o n s

already

1 9 3 5 ,

like

a

o f

variance o f

G e r m a n

a b o u t

a

c o n -

f o r g o t t e n

1 9 3 1 ) .

w r i t t e n

i n s t i t u t i o n s

G e r m a n

a n a l y z i n g

data

t o

plete

o f

statistical

a t t r i b u t e d

w h o l e ,

a n d

p r e - b i o m e t r i c

c o n n e c t i o n

t h e s e

reliable

these

w i t h

t w e n t i e t h - c e n t u r y h a d

T h e

this G e r m a n

(Fisher,

w a s

b l o c k i n g .

agricultural

m e t h o d

p e r f o r m

s t o c k e d

t h e r e

n o

( 1 9 2 9 ) ,

a n d

n o

u s e

b e c o m e b u t

n o o f

q u i t e

p r o b a b i l i t y

role.

i n t i m a t e

a n d

o r

G e r m a n

p r o p e r

w e l l

F i s h e r

t h e

o f

n i n e -

close

the

d e v e l o p m e n t s

w a s

a c o m p r e h e n s i v e in

w h e n

is a l m o s t

k n o w n

replication,

o u t

h i s t o r y

unclear

the

i n d e p e n d e n t l y

B e h r e n s

p r e s t i g i o u s

C a m b r i d g e ,

w h i c h

U .

t h e

research

t o w a r d s

m e a n s

h a v e

early

at

o f

m u s t

w o u l d

o f

like

w o r k e d

p a r t i t i o n i n g

T h e

a n d

literature

d e s i g n ,

n o t h i n g w a s

at

W .

in

i n t e r p r e t a t i o n .

p r o p o s e d

T h i s

r e m a i n s

k n o w l e d g e

G e r m a n

h a d

c h e m i s t

agriculture,

e x p e r i m e n t e r

l e m s

different,

in

t u t o r

cultural

h a n d ,

d i f f e r e n c e

Fisher

parallels

that,

for

t h e

e x i s t e d

e x p e r i m e n t a l

t e c h n i q u e s

tradition.

e x t e n t

t h e r e

a probabilistic

successful

E n g l a n d .

c o u n t r i e s ,

o b t a i n

b e

a l o n g

m o r e

h a d

S t r a t t o n ,

w i t h

statistical

t o

85

o f agricultural

library at R o t h a m s t e d

literature

m a l

o f

agricultural

part

a l t h o u g h

o f

b o d y

s a m p l e s

in Ireland a n d since

tradition

significance

o f

experts

G e r m a n - s p e a k i n g

a rich

e v e n

inference

a n A

data

h e

t o

p e r f o r m

t o

risk

o f

k n o w s

b e i n g

all,

different logical

k n o w l e d g e

b y a n

e x p e r i m e n t e r

H .

c a n

w h a t

t o

i n s i g h t is m o s t b e

"[statistical aspects

h a d

the o n l y p r o -

d r a w o f t e n

i n v o l v e d p r o c e d u r e

o f o f

t h e t h e

e x p e r i m e n t a t i o n "

R o d e w a l d

o f

e x p e r i m e n t

u n a b l e

r e q u i r e m e n t s

b y

a n d

analyst

that statisticians m u s t A f t e r

a s e n s e

e x p e r i m e n t

if

s t u d i e d . T h i s

t w o

all t h e

is

b e g i n n i n g s

s a m e c o m -

(Fisher,

already

for-

1 9 0 9 :

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86

The

D u r i n g

the

last

decades,

field

have played an important conduct

since

therefore

from

its

trials

one

scientific

answer

one

experts

to

compare

varieties

role in agriculture. T h e

s u c h trials a n d h o w

valid and

inference

can

can derive

conclusions.

see

how

the

trials

the

last

have

kinds

o f

question arises h o w

from The

and

results o f the

question

has

to be conducted

to

fertilizer

one

trials

be

should

generally

answered

(Rodewald,

first, 1909,

p.

12).

S o m e 1 8 0 0

s e n s e

in

the

o f

w o r k

e x p e r i m e n t e r

that o f

b e

a p p l y i n g B u t

his

n e e d

t h e

that o n e

w h i c h

n o

" t h e

natural

w a s

in

also

c o n s i d e r e d

for

h i m s e l f

o f

the

m e n t s b l i n d u s e f u l

t h e

if t h e

in

o f

d e t e r m i n e

subject

w i t h

t h e

m e t h o d o l o g y Subject

as m e d i c i n e n o t

k n o w

a certain its

a t t i t u d e

causal

n o t

m a y

for

t h o s e

field. o f

a b o u t

t h e

different p l o t "

a n

in

( t o

i n d i c a t i o n

this

case

a n d

it

s o

h e

p u r -

replication,

w e l l

t o

n u m b e r

o f

u n d e r s t o o d s a m p l e

w a s

-

r e c o g n i z i n g

o f t e n

a b o u t

t h e

b e

b e c a u s e

b y

size

re-

e v i d e n t

a n d

c o u r s e a n

its

e x p e r i m e n t

t h e y

are

r e c e i v e d

Similarly,

a n

n o t

h e

w a s

It is

o r i g i n

l i m i t e d

w a s

T h e

r a n d o m i z a t i o n .

fields, is o f

b l i n d n e s s

e x p e r i m e n t s .

t r e a t m e n t s

effects.

soil"

replication

three

large

o n l y

m e d i c a l

p s y c h o l o g y ;

w h a t

o f

4.2).

this

blindness

a n d

o n

for

u n d e r s t a n d i n g

r e a s o n s in

o f

variety

climates,

replicate,

e x p e r i m e n t e r

o r

a

k i n d s

t o g e t

a

c o n f u s i o n

a n d

u n d e r

" c o n t r o l

r e a s o n

w a s

r e m a r k e d

Still, J o h n s t o n ' s

T h a t

(see

a n d

a p p r e c i a t i o n

n o t

possible.

e r r o r

t h e

p s y c h o l o g i c a l

century.

h a v i n g

the

d i d

m a i n

hair

e x p e r i m e n t a l

t o w a r d

h e

t h e

H e

U n f o r t u n a t e l y ,

§ 2 6 ) .

e x p e r i m e n t s

c o n n e c t e d

fields

1 9 3 5 ,

r e c o m m e n d a t i o n s ,

subjects d o

b e c a u s e

partially

c o n c e p t

a n

w a s

Fisher's

g i v e n

o n

idea

m o t i v a t i o n

w h i c h

spirit,

d i f f e r e n t

d i f f e r e n t

t h e

similar lack o f

m e d i c a l

p r e f e r r e d

s u c h

t o

d i m i n i s h

3.1. A

i n v o l v e d

n i n e t e e n t h in

close

in

replicated

w a s

agricultural

c e n t u r y . J o h n s t o n ,

soil."

result,

etc.

r e p e a t e d

m o d e r n

lead

a r o u n d

h o r n - s h a v i n g s ,

b e

p l o t s

f o u n d

B a c o n i a n

his m e a s u r e m e n t s

o n l y

t h e

(Fisher,

Fisher's

it is s t r o n g l y

part in

t h e

in

o f

like J o h n s t o n ,

in s e c t i o n

A l t h o u g h

r e p e a t e d

true

b e

t u r n e d

b o n e s ,

o n

t h e

d i d

c o n c l u s i o n

t o

a n d

n o t

H i s

a

c o n t r o l ,

n i n e t e e n t h

a p p l i e d ) .

firm

s e r v e s

c o n t e m p o r a r y

n o t

n o

t o

o u r

d i f f e r e n t

J o h n s t o n

w a s

error

agriculturalists

t h e

e x p e r i m e n t a l

that

replications

t o

e n o u g h ,

that

w a s

in

g r o u n d

u n d e r

t o

physician

d u n g ,

. . . h a v e

diversity

variability

the

the

t o

d u r i n g

n o t

fish,

c o n d i t i o n s

natural

c o n c e p t u a l l y

e s t i m a t e

ferred

t o

t r e a t m e n t

c o m p l a i n e d

n o t

t r e a t m e n t

n o t i c e

o v e r l a p p e d

p o s e

s a m e

trial w a s

B u t

are

already

G e r m a n

a n i m a l

r o t t e n trials

is

s t u d i e d ,

o f

2 4 ) . T h a e r ' s

replication

plots.

o f

§

a t t e n t i o n

for

effects

w e a t h e r

1 8 0 9 - 1 2 ,

T h a e r

t h e s e

that

replication

e n l i g h t e n e d

T h a e r .

c o m p l e t e

d i f f e r e n t

( T h a e r ,

for

e x c r e m e n t ,

c i r c u m s t a n c e s

u n d e r

the

fertilizing

h u m a n " t o

o f

n e e d

A l b e r t

c o m p a r a t i v e w o o l ,

t h e

t o is

lies

n e e d n o w also

e x p e r i subject

receiving. t r e a t m e n t

It

is

m a y

e x p e r i m e n t

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is

The

e x p e r i m e n t e r

b l i n d

t h e

subjects h a v e

i n d i v i d u a l

f r o m

t h e

G e r m a n

m e t h o d o l o g i c a l

G i v e n

the

a judge's what

writer

and

o n

signs with [Wagner]

a general

judgments

and

had

second

then

n e e d

c e n t u r y

o b s e r v e r

for

o f

in

next

and

m e t h o d s take

this

R a d a u ,

i m p o r t a n c e

In

and

b l i n d n e s s

o f

t h e

a n d

m a n a g i n g

so-called

b e t w e e n

I n v e s t i g a t i o n

s u b l i m i n a l

o f

e m p h a s i s

o n

e x p e r i m e n t e r

b l i n d n e s s

w a s

d i f f e r e n c e

b e t w e e n

( H a c k i n g ,

1988).

i n f u s i o n

statistics w a s w o r k for b e

for

t h e

statistics o f

o f

l i m i n a r y

s t e p

t h e

m e t h o d o l o g y

f u r t h e r

r e f i n e m e n t

it p r o v i d e d

rich

relevance.

data t o

a

h a d

o f t e n

e x p l a n a t i o n

illustrated w i t h

t w o

o f

o f

field

Earlier b e e n o n

e x a m p l e s

t h e o f

tests

basis t h e

o f

can

o f

o f

t h a n

easily n u m -

t h e

w a s

t h e

h u m a n

e x p r e s s e d acuity

o b s e r v e r s

w e r e

react

e v e n t s ,

d e v e l o p e d

a c c o u n t

(Bessel,

especially after ( P f u n g s t ,

s o u r c e

w h e r e

it

statistical

o f

f r a m e A n d

it

c o u l d

r e a s o n i n g

w i n d o w - d r e s s i n g , principles.

statistical analysis o f

d e -

i n t o

e x p e r i m e n t a t i o n . w h i c h

for

a n d

a c o h e r e n t

for

t h e

1 9 0 7 ) ,

e x p e r i m e n t a t i o n

physical

the

t o w a r d s

clairvoyance

p r o b l e m s

the

n i n e t e e n t h -

s i m u l t a n e o u s

It p r o v i d e d

m o r e

with

for

in p e r c e p t u a l

i n t o

c o m p a r a t i v e

applications

little

in

p a r a p s y c h o l o g y ,

n e w

t h e m

light

T h i s

e q u a t i o n "

c o m p a r a t i v e o f

these

47).

h u m a n t o

to

judgment

chose

especially i m p o r t a n t

t o b o t h .

field

numbers

m a d e

r e c o g n i z e d

e x p e r i m e n t a l

crucial i m p o r t a n c e

d a y - t o - d a y

e x p e r i m e n t a l

b e

o f

that

o b s e r v e r s

A n

w e

p.

o t h e r s

t i m e s

w a s

-

as

removed.

his

a t t i t u d e

these p h e n o m e n a ,

stimuli

some-

proceeded

the

d i s c u s s e d

a t t e n t i o n .

" p e r s o n a l

h u m a n

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t h e

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1 7 6 7

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o f close pairs o f stars c o u l d

a n d

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t h e

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a b o u t

p u b l i s h e d

p l a c e d

cause

test

W i l l i a m

in general,

m o r e

a

binary

experts

rejected

k n o w n

b e f o r e

e x i s t e n c e

inference

t o

m o r e

a n y

t h e

c r e d e n c e

calculation

if it w e r e

n o t

d u e

o f

t o

a

cause. I n

t h e s e

e x a m p l e s

w i n d o w - d r e s s i n g , e x p l a n a t i o n p o w e r s

o f

d r u g s

is o f t e n

a t i o n

o f h o w

o r

t h e

b y

causes

statistics

o f

Fisher

unification

real

inferential

fertilizers

p r o v i d e d

d e n i e d

d i s c u s s i o n B u t

t h e

o f

t h e

is

f r o m

m a d e t h e

g e n e r a l

causal

p r o v i d e d

n o

e x p e r i m e n t

is n o t

o f

d a i m s p a n a c e a .

T h e r e

t o

t h e

i n t o

o n l y

w h i l e

b y

deal

w i t h o f

claims.

s u c h

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causal

e v i d e n c e

detailed

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t h a n

physical

t h e

Fisher's p r o g r a m

p o s i t i v i s m causal

m o r e

carried

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available.

it p o s s i b l e

little

w a s

e x p e r i m e n t s ,

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a n d

b u r d e n

different.

m e a n i n g f u l n e s s

p r o v i d e d

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c o m p a r a t i v e

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a

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w h o

s y s t e m a t i c

possible. Especially

statistical analysis

in

t h e

social

that h e

sciences,

i n s p i r e d

has

t h e b e e n

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9 0

The

highly t h e

t r o u b l i n g

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c r u s t e a n

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t h e y

d e s i g n

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causal

a r e

w i t h J e r z y

d i s c u s s e d

3 . 4

in

t h e

T H E

W i t h i n

b y

t h e

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a n d

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t h e

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o f

R.

v i e w s :

t h e

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t h e y

a r e

p r a c t i c e s .

T h e y

effort.

t h a t

b e e n g o

I n

n o

i n t o

w o r d s

" c o h e r e n t , " t h e o r i e s .

I n

s e n s e

t h e

s c h o o l s

l a d e n

bias,

a r e

d e c l a r e d

d e e p

f e r e n t

m o r e

a n d

f r o m

a p p r o p r i a t e

s h o u l d

o f

a n d

t o

t h e

a

effect

a p p l y

its

o n

s o n

o n

t o

a d m i n i s -

e x p e r i m e n t a l i n f e r e n c e

o f

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c o n -

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e a c h

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a

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o f

a

f o r

t h a t

fiercely

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a p p r o a c h e s

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t h e r e

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s c h o o l s T h e

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dif-

v a l u e -

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c o n c e p t s

c h a r g e d

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intellectual

s e v e r a l

issues,

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earlier r a n g e

o f statistical i n f e r e n c e . a b o u t

as n a m e s

a w i d e r

a l t h o u g h

d i s t i n g u i s h

v e r y

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o v e r

t r e m e n d o u s

h a v e

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a d v a n c e

a c c o u n t

v i e w s

d a t a .

a n d

b r e a k t h r o u g h ,

p r a c t i c e

s p e e c h

rival

E

d i s t i n c t

statistical

c o n s i d e r a b l e

issues

a n d

e n l i s t e d

V S .

i n

w i t h

t h e

a n d

v a r i o u s

inefficiency,

i n c o h e r e n c e .

statistical

s o m e

b e e n

i m p l i c a t i o n ,

r e a s o n i n g

a l l - e n c o m p a s s i n g

fact,

a n d

d i s a g r e e

o r d i n a r y

is

p s y c h o -

r e f e r e n c e

statistical

s e v e r a l

f r o m

o f J e r z y a

s p e a k

T h e

f o u n d a t i o n s o f t e n

h a v e

B y

w i n n e r .

t h e

T h e

d e s i g n

p r o g r a m s .

F I S H E R

c e n t u r y ,

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i n v o l v e

c a n

s t a t e

a l t e r n a t i v e P e a r s o n ,

6 ) .

P E A R S O N

successful

o n e

t h e

o f

E g o n

u n i v e r s a l

necessarily

analysis

D

s y s t e m a t i c t h e

n o t

t h e r e o f

p s y -

c o n c e n t r a t e s

i n c i d e n c e

v i e w s

c o n c l u s i o n s

A .

all

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Fisher's

his

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u n i v e r s a l

statistics,

t w e n t i e t h

t o

f o r

t h e

t o

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c h a p t e r

i m p l i c i t

d o

t h e

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t h e i r

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fit

e x p e r i m e n t a l

p e o p l e .

i n

e x a m p l e ,

s e c t i o n .

N

h o w

all

w i t h

C O N T R O V E R S Y :

a b o u t

o f

t o

t o

t h e

(see

s e a r c h

i n t e r e s t

a d v o c a t e s

e m e r g e d

a n d

b u t

field

t h e

as

for

demonstrate

F i s h e r i a n

o f

t h e s e

f o r e m o s t

A

S i n c e

o n

s u c h

t o

t h e

i n c r e a s e

S i n c e

a c c e p t e d ,

criticized

o f

s t a t e m e n t s ,

o f

1987a).

largely

o u t

a n

n a r r o w e d

s i m p l y

e q u a l l y

o n l y

p s y c h o l o g y ,

A l t e r n a t i v e s ,

relies

a p p l y

is p r e s e n t .

( D a n z i g e r ,

s h a r p l y

r u l e d

I n

s t r i k i n g l y

a b a n d o n m e n t

r e q u i r e

trators

w a s

a n

is w a s

e x p e r i m e n t

t h a t

t h a t

e s t a b l i s h i n g

t h e

u s e

b e e n

w i t h

observers.

statistics.

p s y c h o l o g y

a s s o c i a t e d

w h e n

t o

virtually

experts

t h o u g h t f u l

e x p e r i m e n t

e n d e a v o r

e x p e r i m e n t a l

logical

s o m e

a n

o f

h a v e

o f t e n

t o

inference

t h e o r y ,

if c e r t a i n w o r k i n g

a p p l y

it o f

h a s

n o t

w h i c h

c o n d i t i o n s

t h e

a r e

statisticians

d i f f e r e n t

(yet)

a p p r o a c h e s

p r o v e n

c u r r e n t

satisfied

a d v o c a t e t o

t h e

a n

s a m e

p o s s i b l e

p o s i t i o n s ( b u t

see

a r e

o f

c o m e special

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e c u m e n i s m set

t o

d a t a

i n ( G .

t o

a n

cases,

1 9 8 0 ) .

w h i c h E.

P .

I n o n e

B o x ,

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The

1 9 8 6 ) .

I n

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o t h e r F o r

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t o

t h e

1 9 7 8 ;

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1 9 8 2 ) .

line

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t h a n

b y

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c o n c e n t r a t e

o n

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b e

d i s c u s s e d

v i e w p o i n t s . sciences t h e

f e w e r

f o l l o w i n g

f o u n d e d

w e

a n d

i n s o f a r

T h e s e

t w o in

s c i e n c e s

o f

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W i t h

a r e

this

t h e

o n e

o f

t h e

e l e m e n t s

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m a n .

w a s

least

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i n d e e d

o f

t h e

t h e m

t o

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t r i e d

t o

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b i r t h

r a t e

s u b s i s t e n c e

h e

w e a l t h . f a r m i n g ,

t h e y

B e f o r e since

6

r a n g e

h a v e

a p p l i -

see

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t o

t h a t

w e

a p p l i m o d e r n

o f applicability

o f

h a d . v i e w s

o f

o f

s c h o o l

W e

will

t h i n k i n g

t h e

v i e w ,

t w o

t h e

s c h o o l .

B a y e s i a n

statistical

i n

t h e

t i m e .

at

will

c o n f l i c t i n g least

i n f e r e n c e

i n u s e d

t h e in

v i e w s .

t o

i n f e r e n c e

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a

s t u d y

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f a r m i n g

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a n d

o f

t h e

t h e

rise

a n d

h e

(see

h e r e d i t a r y o n

fall o f

societies

a c a d e m i c

w a s , i n his v i e w ,

social

i n h e r i t a n c e

s u p e r i o r i t y a n

c h a p t e r

j u d g e d

b i o l o g i c a l a n d

biology. a n d

statistician

o n

e m b a r k e d

a n d

r e v o l u t i o n

h e l p e d

m o t i v a t i o n ,

w h o s e h e

i n

w h e n

a n d

physics, m a t h e m a t i c s ,

e x p l a i n e d

t h o s e

i n r o a d s

t h e o r e m

will

t h e

F i s h e r

abilities

d r i v i n g

effects

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his

his

t h e

o f

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u n d e r g r a d u a t e

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h e

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w e

t h e

rationality.

c h a p t e r

p o i n t s

a l e a d e r

o f

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in

t h e s e

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s t u d i e d

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a c c o r d i n g A s

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h e

f r o m

o f

p e n e t r a t e d

m a d e

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f o r m

R o n a l d

g e n e t i c i s t s

t h e

n o t

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m e a s u r e s o f

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g r e a t

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a p p l i -

d e s i g n a t e d

h u m a n

t e s t i n g .

d o m i n a n t

o f

c o n c e p t s

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t o

( R u b i n ,

i n f e r e n c e

h a v e

h a v e

c o n f l i c t i n g

significance

b o o k .

m i x e s

this b a c k g r o u n d ,

t h e

as it is r e l e v a n t

Sir

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o f

o f

t o

t h e

p a y i n g

fields

u s u a l l y

a n d

T h e r e

s e e m s

o f

e i g h t e e n t h - c e n t u r y

a b o u t

e m p h a s i z e

analysis

o n l y

7.

h i m s e l f

will

a n d

t h i n k i n g

c h a p t e r

B a y e s

M e t h o d s

B a y e s i a n s

r e s e r v a t i o n s

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d i s c u s s e d

social

in

e x p e r i -

c o n d i t i o n a l

t h e

j u d g m e n t

o f

t o

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b e t w e e n

a p p l i c a t i o n s

d i f f e r e n t

c o l l e c t e d

t h e

o f

t r a d i t i o n a l

s t u d y

a r e

w i t h i n

B a y e s i a n s ,

B u t

legal

r e c e n t

life

h a v e

t h e o r e m t h e

as

o p p o s e d

N e y m a n - P e a r s o n ,

w h e r e a s

s u c h t h e

e v e r y d a y

a n d

n o t .

e x p e r i m e n t a l

Bayesians o f t e n B a y e s '

o f

s c h o o l s .

b e t w e e n

i m p o r t a n c e

o b s e r v a t i o n s

c l e a v a g e

r e c o v e r e d

p r o b a b i l i t y

t h e

cations

h a v e

o f

t i m e

t h e

i m p o r t a n c e

F i s h e r

h a v e

l o n g

statisticians

v a r i o u s

sciences,

s c h o o l ,

discuss

t u r n

t h e

s c h o o l s ,

a n d

o f

b y

a

r e c o g n i z e

t h e

r e m a r k a b l e

9 1

c o n v e r g e n c e

f o r

w h i c h

Similarly,

10).

s o m e

w e r e

b y

c h a p t e r

experts

b e e n

n o w

r e c o g n i z e d

a

e c o n o m i c s

b u t

p r o c e d u r e s

1 9 8 6 ,

is

h a s

B a y e s i a n s

r a n d o m i z a t i o n ,

a t t e n t i o n

will

t h e r e

inference

i n

e n a b l e d career,

a e u g e n i c

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w a y

92

The

o f

life, in w h i c h

tor

(J. F .

t o

t h e

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R o t h a m s t e d

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l o o k s

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ments,

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part,

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based w i t h

o n

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a v e r a g e

yield

p e r

t h e

right

t e c h n i q u e s 2 5

o f

t h e

a

a n d

Fisher's

w a y s

t o

basic

p o s e s

t h e

b y

t h e

in b y

w a s

e x p r e s s

t h e

o f

Fisher m u s t

probability. a p r i o r w a s

a

w i t h a

T h e

w e r e

p r e s e n t e d

a n d

verifiable

in

inferthat

t o

s o l d

b o o k

t h e

n e w

d u r i n g

t h e

international

o f

( 1 9 3 5 ) , c o m p a r a t i v e

t h e

a n d

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( 1 9 2 5 ) ,

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h a d

factorial r e a c h e d

a

1 9 6 2 .

o f

statistical

a p p r o a c h in

t h e

Bayes'

insisted t o

a l t h o u g h

in statistical

d i s t r i b u t i o n h e

Fisher

w i t h

Workers

h y p o t h e s e s

o f

t h e

i n f e r e n c e s

itself,

efforts

t h e

u s e

frequentist, b e

o f

w i t h

m o s t

e x p e r i e n c e ,

H i s

w h e n

t h e

c o p i e s

h y p o t h e s i s

p r o b a b i l i t y

theoretically

a n d

of

in

f r o m

u n c e r t a i n t y

o f

F o r

successful,

c o n c e p t s

satisfied

1 9 1 7 ) .

principles

provisional.

u n c e r t a i n t y

a p o s t e r i o r

learn

d e v e l o p i n g

n o t , h o w e v e r ,

S i n c e

w e

field

Experi-

d o n e

increasingly

d e a t h

o f

I n d e e d ,

r a n d o m i z a t i o n ,

similarly

t y p e s

Rothamsted

Research

Design

t h e

Fisher's

that

r e m a i n

t h e

o f

The

o f

C o n t i n u o u s

agriculturalists

a n

soil

f a m e . Fisher's first

2 0 , 0 0 0

t o

b l o c k i n g ,

o f

t o w a r d

a n d

w h i c h

ability j u d g m e n t

It

w a s

nearly

t h e

c o n f r o n t a t i o n s

for a n d

b o o k ,

a c c o u n t

always

availability

h y p o t h e s e s .

third

t i m e

belief

d i r e c t e d

data. Fisher w a s

e x p r e s s e d

Methods

o n

b e e n

station

c h i e f

agricultural

R o t h a m s t e d

t h e

e x i s t e n c e ,

replication,

m u s t

m e a s u r e

t h e o r e m ,

H i s

h a d

t h e

at

R o t h a m s t e d

station.

of the

4.4).

v a r i o u s

o f

vari-

factors

also

b e c o m e

a n d

o f

statistician

effects

(Hall,

daily

biologists

o f

t o

tabulated,

o f

see

fac-

Fisher

causal

a m m o n i a .

t h e

little

m e a n s .

w o r k

Statistical

c o n f o u n d i n g .

k n o w l e d g e w e r e

t h e

b o o k ' s

s y s t e m a t i c

e d i t i o n

e n c e

in

o f

b y Fisher's rapidly g r o w i n g

1 9 5 1 ) .

e x p e r i m e n t a t i o n :

s e v e n t h

w a s

o f

t h e

Book

h o w

It p r o v i d e d

i n t r o d u c i n g

( Y a t e s ,

p r o v i d e d

d e s i g n ,

a n n u m

p o s t

led

analysis

1 9 1 8 ;

a w e a l t h

The

that

L a b o r a t o r y .

j o i n e d

o f

o f statistical analysis, w i t h

years

a u d i e n c e

arose

t h e r e

in

e d i t i o n

c o m p a r i s o n

m e t h o d o l o g y ,

successful

p r o v i d e d Fisher

d o m i n a n t

d i f f e r e n t

b o n e s ,

e x p e r i m e n t a t i o n

challenge.

that

b u r n t

t h e

o f f e r

G a l t o n

m u r i a t e

is s t r i k i n g

o f

statistical

first

it

years

visitors attracted

w a s

1 9 1 7 ,

a j u d g m e n t a l

just

s e c o n d

a n

i n v e s t i g a t e

o r

w h e n

o f

c r e a t e d

t h e

m e a l ,

o f

Fisher,

r e f u s i n g

t o

1 8 4 3 ,

sixty

ential p r o b l e m s

o n

t h e

n e w l y

s u l p h a t e in

t e c h n i q u e

1 9 8 0 ;

at

b o n e

b e g u n

t h r o u g h

t h e

1 8 3 0 s

data, still largely u n a n a l y z e d o n e

B o x ,

Station,

late

w i t h

t h e

t h e

o f inheritance

c o n t r i b u t i o n s

P e a r s o n

c o m b i n a t i o n s

m i n e r a l

t o

t h e

a c c e p t e d

K a r l

in

a n d

(J.

E x p e r i m e n t a l u n d e r

qualities w e r e

his investigations

separate

correlations

1 9 1 9 ,

statistician

It w a s

t o

experts

b u t p e r s o n a l

variance,

c o m p o n e n t s

In

m o n e y ,

1978).

c o n c e p t

o b s e r v e d

w a s

n o t

inference

a n y

in

o u r

infer-

e v i d e n c e t h e

light

b a s e d

o n

light

o f

o f

Bayes' data

is

t h e o r e m

p r e s u p -

o v e r

t h e

p o s s i b l e

that

e v e r y

c h o s e n

p r o b -

d e g r e e

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o f

The

a p p r o x i m a t i o n

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can, a c c o r d i n g

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o t h e r

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that

tainty o f

h y p o t h e s e s

f r o m

a

small

t h e

in

n u m b e r

t h e

t o

e x p r e s s

priori

m u t u a l l y o f

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s t r e n g t h

o f

evi-

w i t h

a

light

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o f

t h e

t h e

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u s e

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t h e

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t o

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p o i n t

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m a k e

o n e o t h e r

t o

t o

special

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refer-

correct. n o t

m e a n

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o f v i e w ,

e x p r e s s

Bayes'

Fisher's

w h a t

d o e s

m e a n i n g f u l

u s i n g

f u n c -

probability.

t h e o r e m .

o n l y w a y

d o e s

o f

b e i n g

Bayes'

d r a w

test

u n c e r t a i n t y

instance,

f r e q u e n t i s t

data. T o

o b s e r v a t i o n s

o f

F o r

a s s u m -

t h e

r e s p e c t

testing.

c o n t r o v e r s y .

signifi-

data,

c o n s i s t e n c y

f r e q u e n c y

significance

A

g o o d

p r o p o s e d

t e r m s

fact,

a

in certain

in

w i t h

all

as a l i k e l i h o o d

e x p r e s s e d

t h e

that

h y p o t h e t i c a l

c o n s i d e r a t i o n s

applies,

a

a

p r o b a b i l i t y

s u c h

o f

d i f f e r e n t

significance

a r g u m e n t

clear

test.

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u s e

h a v e

t h e

data. O n l y

q u e s t i o n e d

o f

A

o f

b e

are, in in

n o t

that

light

m o d e l , "

g i v e n

it is n o t

less

b y

in

t h e

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d o e s

s u g g e s t

d e g r e e

f r e q u e n t i s t

t a k e n t h e

o n l y

t h u s

a s s u m e

significance

theoretical

has

t o

t o

a p p r o p r i a t e

o n e

uncertainty,

c a n

h a v e

are

a

s h o u l d

o b j e c t i o n s

p r o p e r l y .

fiducial

since

o f

m a k e

p a r a m e t r i c

m o d e l

m a n y

o f

a

state

w h e r e

u n -

n o

w a y

s a m e

w r o n g

w h e n

c a n

a n d

r e p r e s e n t

c a u s e d

r o u t e

v e r y

s u p e r -

v e r y

researchers

i n f e r e n c e

that

specific

h y p o t h e s i s

analysis

a

the

c o n s i s t e n t l y

h a v e

o n e

o f probabilities.

p e r f o r m e d

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d i f f e r e n t

are

is i m p l a u s i b l e

"full

o n l y

t o o l s

can

a n d

a n y

f r e q u e n t i s m ,

deal

b e

a n d

t h a n

n u a n c e d

in t e r m s

b e l i e v e d ,

particular

w h i c h

f r o m

c a n n o t

m o r e

t h e

f r o m

t h e r e

s a m p l e d ,

o b v i o u s l y

i g n o r a n t

statistical

t h o u g h t ,

so-called

that

are

subjectivism,

e x p e r i m e n t s ,

w a s

in

Fisher h e r e

h e

o n ,

a n d

his

a l l o w

h i g h l y

e x p e r i e n c e

calculate

are

b e i n g

r a n d o m

t h e o r e m

u n c e r t a i n t y

assign

a c c e p t i n g

a d h e r e n c e

his

a r g u m e n t

t h e p a r a m e t e r s

situations,

o f

r e p r e s e n t

past

p o p u l a t i o n at

Bayes'

cases w h e r e

p o p u l a t i o n

cases

e x p r e s s

in

e x p r e s s e d

t o

W h e n

t o

light

is g o i n g

o n e

t h o s e

1 9 6 2 ) .

taste.

h y p o t h e s i s )

p o t h e s i s .

m e t h o d s

o f

t h e

exist

u n a c c e p t a b l e

e x p e r i m e n t

p e r m i t

will

(Fisher,

in

d r a w n

w e

t o

u s e d

T h e s e

T o

p r o g r a m

w e a k

null

t h e

t h e r e

c o m p a r a t i v e

w h a t

b e e n

w h e r e

Bayesians,

t o

I n

a b o u t

c a n c e

a n

c a n b e

w a y s

situations. idea

t h e

T h e

uncertainties d i f f e r e n t

t o

m a t t e r

in

rule.

F o r

set

t h e

Bayes'

probabilities

research

u n d e r s t o o d

that

probabilistically.

inconsistent

that

itself

h e l d

b e

a b o u t

k n o w

has

i n f o r m a t i o n ,

i g n o r a n c e

o n l y

specification.

also

o t h e r

Fisher,

w e

d r a w n

k n o w n

distributional that

w h e r e

93

r e f e r e n c e

t h e o r e m

that

experts

v o n

a g r e e d B u t

h e

u n c e r -

c o n c l u s i o n s t h e o r e m ,

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as

94

The

Fisher in

w a n t e d ,

1 9 5 1

that

M i s e s , the

" t h e

[ 1 9 2 8 ]

1 9 5 7 ,

u n d e r s t a n d s u p p o r t

p.

s i m p l y

t h e

F o r

t h e

o n e

can

that

(1)

T h e

b u t i o n a m p l e pair

w a s

b u t i o n

s a m e

t h e

3.2,

t h e

for

all

pairs.

It

" r a n d o m

o b s e r v a t i o n s

t o

lack o f

sibly

as

t h e

t o

m a t r i x " ( 2 )

a

d e g r e e

e m p h a s i z e d

lead

f r o m

f r o m

t h e

s i t u a t i o n

h y p o t h e t i c a l

o f

t h e

W e o f

b e o n

d e v i a t i o n

s a m e

that

o f

p o s s i b l e

f r o m

t h e

has

s u c h

as

o b s e r t h e

hy-

T h e r e

are

t h e

p o s s i b l e

a

m e a s u r e W e

as

b o t h

since is in

t h e

h e r e

s a m e

that

b o d y

c o n c e r n s

w h i c h

t h e i m p o r t a n c e

o f

s h o u l d

h y p o t h e s i s .

t h e

B u t

a n d

a w e a b e

o f

data.

t h e

p o s -

since

it

"causal

this p o i n t

t h e

if

n o t

s a m e

reflect

o f

d e s i g n ,

c o u l d

ineffective,

/-

is n o t

instance,

first

it

T h e

u n k n o w n

s p e a k s

t h e

t h e

t h e

variance

t h e p o p u l a t i o n

o f data

a

distri-

variance.

F o r

o f

o b s e r v a t i o n s

o f

u s i n g

b o d y

n o r m a l

o n e

e x -

w h i c h

u n k n o w n

repeatedly. field,

in

r a n d o m

a l t h o u g h

distri-

m e m b e r

a

u n k n o w n

o b s e r v a t i o n s null

o f

agricultural

e a c h

i n d e p e n d e n t

t r e a t m e n t

t o

t h e

a n d

t h e n

a n d

r e p e t i t i o n s

will r e t u r n

test

a u n i q u e

p o p u l a t i o n ,

p o p u l a t i o n

t h e

o f

that

pair,

are

that,

u n r e l a t e d

a

w i t h

a n d

is

1 4 9 ) .

null h y p o t h e s i s .

in

b u s h e l s )

t h e

zt

h y p o t h e t i c a l ,

series

t h e

s a m e

s a m p l e d

s a m e

t h e

p o p u l a t i o n , "

t h e

o f

h y p o t h e s i s ,

stated

z e r o

h e r e

s a m e

t o a q u i t e

p o p u l a t i o n

o r d e r i n g

m e a n

o f

implausible.

f r o m

in t o

p.

f r o m

o r d e r i n g

J e r z y

n u m b e r s

1 9 4 1 ,

e n o u g h

instance,

distribution,

e x p e r i m e n t

is o p e r a t i v e .

T h e

w i t h

in principle

t a k e n

h y p o t h e t i c a l

refers

tive

t h e

rain m i g h t

called

b e

c o u l d

r e p e a t

c o n s i d e r e d F i s h e r

t o

g r a i n

a n

null

t h e

particular

k n o w n

variance.

w e r e

has

a

o f

o f

features

specification

F o r

f r o m

158).

in

i n f e r e n c e

h y p o t h e s i s

is

t o

o r d e r .

t h e

d i f f e r e n c e s

d i s t r i b u t i o n

h a v e

that

T h e

t h e

h y p o t h e s i s

(yield

null

d e v i a t e

that

statistic.

null

m e a n

in

a l l o w

o b s e r v a t i o n

u n k n o w n

will

real o n e

test

o b s e r v e d

a n o r m a l

statistic

for

m u s t

a

d e v i a t e s

c o n c e p t s

n o t

I n a test o f significance,

h y p o t h e s i s , f r o m

p.

( N e y m a n ,

h y p o t h e s i s

o b s e r v a t i o n

t h r e e

r a n d o m

w i t h

null

their d e v i a t i o n

h y p o t h e s i s

s e c t i o n a

o b s e r v a t i o n s

probability

a t h e o r y

essential

f o r m

his f o l l o w e r s

fiducial

e x a m p l e ,

t h e

t h e

o f

( v o n

c o u l d

c o n f e s s e d

1 9 5 7 ,

c o n f r o n t s

t h e

H e

[ 1 9 2 8 ]

d e f i n i t i o n s "

past"

o f prior

M i s e s ,

o n e

t h e

influence

t h e o r y

p r o c l a i m e d

b e l i e v e d ,

a n d

as follows.

c o n c l u d e

h e

F i s h e r

as, f o r

e x p o s i t i o n ,

h e

is a l r e a d y

vanishes.

" t h e

w a y

a n d

b y

3.2,

here:

t h e s e

f u n c t i o n o f

f r o m

c a n

as t o

characteristic

t h e

s e c t i o n

w h e t h e r

null

h e l d :

s a m e

this

the

u s e d

( v o n

c o n t r a d i c t o r y o f

c o n c e p t s

u p

t h e o r y "

t h e

far a particular

take

w o r d s

. . .

s a m p l e s ,

d i s t r i b u t i o n

s u m m a r i z e d

o n e

o b s e r v a t i o n s

will

in

see

t h r e e

h o w

b e

large

n o t h i n g ,

t h e o r y

since h e r e

beautiful

in

f r o m

s a m p l e

O n l y

cautiously,

p u r p o s e s

t o

p o t h e s i s t h u s

m a n y

less

g i v e n

v a t i o n s

1 5 9 ) .

experts

m u c h

small

inference,

m u t u a l l y

significance

t o o

p o s t e r i o r

n o n - e x i s t e n t b y

o f

l i k e l i h o o d

still

d e f i n e d

the

t h e

"the

o f

N e y m a n ,

o n

g e t t i n g

h e y d a y

basis o f objective

a s s u m p t i o n s

o f

m e a n t

inference

their

later. rela-

o b s e r v a t i o n s

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The

c a n

d e v i a t e

sary

t o

t i o n ,

in

d i f f e r e n t

c o n s i d e r

a n d

p r o c e s s

t h u s

d i f f e r e n t

i n d e p e n d e n c e , test

b a s e d

t h e

test

a n

o n

o n e t h e

a n d

the

testing,

kind, and

in

accomplished

(3)

A s

>

j

o b s

o f

t h e

;

0

H

W e

F i s h e r

o f

g a v e

o b v i o u s

t h a t

d i s c r e p a n c y c o m e s

n o t

Scientific

( F i s h e r , A l l a

b e t w e e n

a n

significance

in

1 9 5 6 ,

all, t h e

u s e f u l

w i t h

r e s p e c t

ancy. 3.2,

S o ,

b e

actually

t o w e

t h e h a d

less

m o r e

clear. f o r

It

a n d

s h o u l d

l o w e r test

a

experiments q u e s t i o n

r e m a i n s

Sellke, b e

statistic

t h e

o r

w i t h o r

w h e t h e r w h e t h e r

u n s e t t l e d

a

ever

(Fisher,

f r o m

it

t h e

called

w i t h

his

w i t h

different

same

t h a n

level

( M a r t i n - L 6 f ,

m e a n i n g f u l 1 9 7 4 ;

a a n d

d i s c r e p -

o f

s e c t i o n

o b s e r v a t i o n s t h e

is

is

o b s e r v a t i o n s

t h e

significance

t o

experiment

t h e s e

statistics

o t h e r

level

r e s p e c t

e x p e r i m e n t 1 % ,

t h e o r y .

a g r e a t e r

test

a n y

f e a t u r e

l i k e l i h o o d

i n d i c a t e

o u t -

a p p r o x i m a t i o n "

t h e

t h e

t h e

Methods

o f

say,

o n

Statistical

significance

in

,

o f

s h o u l d

F i s h e r i a n d a t a

o b $

s o m e t h i n g

d e p e n d

a n

j

e x p l a n a t i o n

§ 7 ) . W h y

as

h y -

u s e

a q u e s t i o n a b l e

s a v e

6).

f r o m

v a l u e

1 9 5 6 ,

this w a s

1939, p.

its o b s e r v e d

o r i g i n a l

of

b e e n

n u l l

d e r i v e d

o f

has

t h e

h y p o t h e s i s

of,

re-

w o r t h

d e v i a t e s

u n d e r

1 9 3 5 ,

level

be

C o n s t r u c -

thinking

f o r m

h y p o t h e s i s

w i t h

can

t h e

level

Fisher,

are

c o m p a r a t i v e

t h e

for

a o f

hypotheses

T h e

will i n d e e d

in

c h o i c e

w h a t

since

o d d s

w h e t h e r

significance

d i s c r e p a n c y ,

t h a t

significance

o b t a i n e d ,

a

o r

o f data

o b s e r v a t i o n

b o o k

d i s c r e p a n c y

d i s c o r d a n t

T h e

d e v e l o p e d ,

B e r g e r

t h e

a n d

it is a t

r u n s ,

f o r

experience

fundamental

d e f e n s i b l e

i n d e e d ,

test

o n

c u s t o m

his later

v e r y

r e m a i n s

same

based

(Fisher,

c o n c e d e d

" n o t

A

w i t h

m a d e . Across

m e a s u r e b e

m o d e l .

o b s e r v a t i o n s

w o u l d

is

if

o f

I n

o f

r e m a i n s ,

this process

satisfactory,

o b s e r v a t i o n

t o

a

p r o c e s s :

o u t l i e r s .

m o t i v a t i o n

p . 6 6 ) , a n d ,

m e a s u r e

o f

w a n t s

is t h a t

1 9 6 8 ) . T h e

p r o b a b i l i t y

this

d e v i a -

o f tests o f significance.

p a r t i c u l a r

t h a t

o f

h y p o t h e s i s

testing,

that

this

t h e

k i n d s

n u m b e r

statistic s b e y o n d

v e r y

F i s h e r

q u e s t i o n

h y p o t h e s i z e d

test

o b s e r v e d ?

testing,

a

n e c e s -

t h e

deciding o n

w h e n

u s e d

n o t

m o r e

Inference,

theory

r e j e c t i o n

w a s

think

k n o w l e d g e

m u c h

earlier

n e e d e d

actually

to

b e

o n e

( B r a d l e y ,

w o r t h

m a y

a n d

m e c h a n i c a l

before

t h e

t h e

o n

n u l l

be given a mathematical

F i s h e r

i n

a

O n l y

h o w

n o t e d

this

t o

m u c h

respects.

o f

r u n

It

d i f f e r e n t

if t h e

b a s e d

l o n g e s t

exercised

tail area

) .

test

illusion

with

h y p o t h e s i s .

r e f l e c t i n g

h y p o t h e s e s

an

n u l l

i n s t a n c e ,

mathematical

h y p o t h e s i s ,

tests

o f

b u t

o f

a

93

c o i n - t o s s i n g ,

a

r e d u c e d

be

m e a s u r e

significance

and

null

together

w h a t

t h e

can the p r o b l e m

a

n u l l

p o t h e s i s p(s

o f

o f

b e

m u s t

F o r

c h o o s e

to a self-contained

same

t h e

a n d

n o t h i n g

tive imagination,

f r o m

i n d e p e n d e n t

l e n g t h

experts

o r d e r i n g s ,

tests.

m a y

c a n n o t

It is, I b e l i e v e , d u c e d

like

statistic,

art,

r e s p e c t s

d i f f e r e n t

b e h a v e s

inference

a

s i t u a t i o n

m e a n i n g f u l m e a s u r e

S e i d e n f e l d ,

c a n 1 9 7 9 ;

1 9 8 7 ) .

r e c o g n i z e d

that,

a c c o r d i n g

t o

F i s h e r ,

r e j e c t i n g

t h e

n u l l

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96

The

h y p o t h e s i s tion. T h e b u t

is n o t

latter

r e q u i r e s

a n

e q u i v a l e n t

c a n n o t

o b t a i n i n g

i m p r o v e m e n t

c o n d i t i o n s . results t h e

s h o u l d

for

" n o

t h e

b e

n o t

in

1 9 3 5 ,

§ 7 ) .

fication

I n

fail

natural

a

selective t w o , t h e

statistical

h y p o t h e s i s B o t h

f r o m

t h e

this

a n d

in

his

i m p l a u s i b l e ,

a n d

Experiments

h a s

s a m e

v e r y

t h e

p h e n o m e n o n : w h i c h

a p p r o p r i a t e

o n l y

in

t h e

s a m e

g a v e

A n d

" [ T ] h e c a n

just

as t o

d i s p r o v e

c r i t e r i o n

o f

f o r

" t h e o r i e s

p p .

4 0 - 1 ) .

t o

tests

1 9 3 5

a n

. .

o f

e x -

f r o m

F i s h e r ' s t o

t h e

the

p a r t , i d e n t i -

d e m o n s t r a t i n g

significant w e

is

(Fisher,

testing

h a s l e d

I n

e x p e r i m e n t

r e s u l t "

o n

h e

suffice

p h e n o m e n o n

p r a c t i c e

o f

signifi-

c a n

result.

A s

F i s h e r i a n

a w e

will call t h e

hybrid

significance

N e y m a n - P e a r s o n - W a l d

in

t h e

t h e

facts

e x p r e s s

just

as

t h e

s h o w n

" p r o v e d

w a y

s c h o o l

t h e

a c h a n c e

b y

o f

o f

science s y s t e m

w h i c h

m e t t l e "

a n

P o p p e r

a n d t o

a

b e

unfalsified

o f

o u t

t h e

1 9 6 8 , t o

t h a t

p .

e x i s t

c a n n o t

falsifiability "it

m u s t

as b e

e x p e r i e n c e , " [ 1 9 3 5 ]

" d e g r e e

h y p o t h e s e s

[ 1 9 3 5 ]

d e f i n e d

h y p o t h e s i s "

b y

( P o p p e r ,

n o t i o n

b e

n u l l

u s e d

r e f u t e d

n a t u r a l

said

n o n - s c i e n c e :

b e

( P o p p e r ,

t h e

a

[ 1 9 3 5 ]

e x p e r i m e n t

v e r i f i a b l e "

n e e d e d

m a y

o f

carries

( P o p p e r ,

of

Discovery.

m a y

w h o

b e

p u b l i s h e d

Scientific

effect

a n y o n e

o n l y Design

b o o k

d e m o n s t r a t i o n

d i s p r o v i n g

is futile,

e m p i r i c a l l y

t o

of

e x p e r i m e n t

t h a t p e r f o r m i n g

P o p p e r

Logic

c a n

F i s h e r ' s

r e m a r k a b l e

p r e s c r i b e d "

" E v e r y

scientific

t h e i r

plausible,

P o p p e r ' s o f

h y p o t h e s i s

s i g n i f i c a n t physical

b e t w e e n

d e g r e e

n u l l

a n o t h e r

n u l l h y p o t h e s i s

. . . never

a

r e p r o d u c e d

w r o t e :

e m p i r i c a l

I n d e e d ,

as

K a r l

r e g u l a r l y

t h e

t h a t

b e

scientifically

16), m e a n i n g

a r e

a n d

n e v e r

m e s s a g e

d e m a r c a t i o n

a n

f o r

t o

b e

g i v e

p o s s i b l y

u p

a

w r i t i n g

e l e m e n t s

c h a r a c t e r i z a t i o n

F i s h e r

1 9 3 5 , p .

o r a t i o n "

so-called

1 9 3 5 :

e x p e r i m e n t

o r d e r

p o s s i b l e

m i x e s

i n s i s t e n c e

c a n

year, s a m e

(Fisher,

a

t h a t

itself,

significance

o f w h a t

t o

o f

c o n d u c t

statistically is p a r t

l e d

testing.

in

4 5 ) .

single

t h e

h a s

reflect

p h e n o m e n o n .

o f his early w r i t i n g s

e n c o u r a g e d a

t o

o t h e r

c o r r e c t l y

significant

C a r e l e s s

o f

t h a t

h o w

statistically

3.5, this p r a c t i c e

s h o w n

t h a t

k n o w

say

phenomenon.

i n f e r e n c e

i d e a s

a

m a y

d i s t i n g u i s h e d

basis

in s e c t i o n

w e

u n d e r

o r

n o n - s i g n i f i c a n t

in

n a t u r a l

q u e s -

e x p e r i m e n t ,

Experiments

significant a n y

o r

also

e x p e r i m e n t

i n

e x p e r i m e n t ,

l i t e r a t u r e

of

c a u s e

single t h e

b u t

Design

o f

t h e

l a b o r a t o r i e s

F i s h e r

h a s

w h e n

t h e

o f

The

w e

u s

r e a d i n g

a n d

let

h o w e v e r

w h e n

g i v e

of

o n

w i t h

t o

p a s s a g e ,

t h e

p h e n o m e n o n will s h o w

o f

this

w i t h

o f

o f

test

r a r e l y

c o m b i n e d

as

b o o k

e x p e r i m e n t ,

o t h e r

t y p e

o f

basis o f o n e

results

t o

c e r t a i n

his

d e m o n s t r a b l e

demonstration

P o p p e r

o r d e r

significance,

will

t h e

i n

efficacy

significant,

t o

t h e

t h e

at

o n l y

a

t h e

significant

d e m o n s t r a t i o n

w h i c h

i n

o n

r e p e a t e d

w h i c h

i s o l a t e d

p e r i m e n t a l l y

t e s t i n g

is

p u b l i s h e d

A l r e a d y

a c c e p t i n g

e x p e r i m e n t a l

r e l a t i o n

theory

m o r e

it,

w i t h

results.

w r o t e :

o f

t o

experts

established

T h e r e f o r e ,

f r e q u e n c y

c a n t

b e

inference

1 9 6 8 ,

o f h a d p p .

1 9 6 8 ,

c o r r o b s t o o d 4 0 - 1 ) ,

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

The

F i s h e r s o

also vacillated,

w e l l

k n o w n

nificance said

t o

t h a t

b e

u p o n

a b o v e

d i v e r s e , F o r

t h e

a n d

t r e a t m e n t

h a s I f

t h a t

false,"

is

in

h y p o t h e s i s T h e

t h e

n o t

h a s

m e a n

The

a r e

o f

belief

of

T h e s e T h e y

w o r d s ,

d i d

in

m o s t

o f

it

sig-

m a y b e

F i s h e r

n e v e r

b e

this

t h a t

t h e

false.

t r e a t m e n t

t h e

t h e

h y p o t h e s i s

n u l l h e

l e a r n i n g

t h e

n a t u r e

a c c r u e d "

false

is

t o

t h e

b e

n u l l

n u l l

if

t h e

E f f o r t s

F i s h e r

a

d i d

c a t e g o r i c a l

s e v e n t h . . .

[ 1 9 3 5 ]

h y -

e x e c u t i o n

e v e n

r e p o r t s ,

(Fisher,

effect.

effective.

e x p e r i e n c e ,

c a n n o t

t h e

h y p o t h e s i s "

p r o g r e s s

a n

d i s t r i b u t i o n .

F u r t h e r m o r e ,

a d d e d

b y

o f

i n

h y -

belief

statistical

s a m e

e r r o r s

" t h e

t h e

s u b s t a n t i v e

t r e a t m e n t

a

as: null

h a s

t h e

t h e

t o

r e q u i r e d .

A s

is

a r e

r e a d e r .

substantive

" a d o p t i n g

r e j e c t e d

n u l l

still b e

t h e

f r o m

w r i t i n g s

h y p o t h e s i s

as

s y s t e m a t i c

w h i l e

far

call

his

h e r m e n e u t i c

n u l l

s a m e

c o n c l u s i o n s

n o t

call

The

Design

for

h a v e

d o n e

h i m

as

" t h e

significance

" a n

m o s t

m u c h

t o

e d i t i o n

c o n c l u s i o n s i n t e r p r e t i n g

I 9 6 0 ,

d e t a c h e d

i n v e n t i v e

o f

s i m p l e

t h e

size

t h e i r

( Y a t e s ,

§ 1 2 . 1 ) .

f r o m

t h e i r

h e

o f

f u r t h e r t h e

p r o m o t e d

t h e

t i m e ,

( E d w a r d s ,

1 9 7 2 ,

a n d p .

1 9 2 5 ,

b y

Statistical

a g r e a t in

o f

e m p h a s i s

for

o n

tests

w i t h

fiducial

a statistical

effects b y

r e a d e r s .

Methods

c o m p a r i s o n

e x i s t e n c e

controversial.

F i s h e r ' s

h i g h e s t I n o w

h a v e

t h e

F i s h e r ' s

t h e y

p r a c -

s t u d i e d ,

m e a n s

o f

a

b u t

single

1 9 5 1 ) .

t o statistics r e m a i n

g e n i u s

tests

o f

u p

social scientists a d o p t e d

e s t a b l i s h e d

d e v e l o p

p i c k e d

Experiments

relatively

r e s u l t

n o t

b o o k of

assessing

e x p e r i m e n t a l

h a s

o f t e n

earlier

in c o n s e q u e n c e ,

t o

w h o

w e r e

w e r e

Fisher's c o n t r i b u t i o n s

a d v a n c e "

a test

7 3 ) .

B u t

m o s t

t h e

is

" i n

s o

t h e

d r a w n

statistical

is

1 9 7 7 ) .

e q u i v a l e n t

m a y

his

in

w h i c h

c l a i m e d

significant

w o r k

in

h o w e v e r ,

a n d

intervals. P a r t l y

m e r e l y

it

e v i d e n c e

b o t h

Workers,

t h a t

a n d

are

d i s p r o v i n g

i n d u c t i v e

n u a n c e s ,

significance,

tice

fallacy,

basis.

f o u n d ,

Research

t h e

at

1 9 5 5 , p .

t h e

t h a t

is n o t

t h u s

o r

is

a c c e p t

t r u e

Experiments,

e m b o d y i n g o t h e r

o r

t h a t

p r o v i s i o n a l

e v i d e n t i a l

o f

t h e

t h e

m a y

c a n

h y o t h e s i s

t h e r e

effect,

r e s u l t

O n e

s a m p l e s

m a k e

e v e n

f o r m u l a t e d

i n d e e d

t w o

" r e j e c t i n g

Design

a l w a y s

a n d

t h e

"it is a

f r o m

e s t a b l i s h e d ;

( C o x ,

t o

h y p o t h e s i s

t h i n g ,

n o

b y

a d o p t i o n

I n

this

t h e

t h a t

credit:

c o n c l u d e

(Fisher,

F i s h e r

p e r i o d . "

d o e s

t h e

o n e

d e s i g n

r e p l i c a t e

o f

t h a t

F o r

t r e a t m e n t t o

effect,

statistical n u l l h y p o t h e s i s

p o t h e s i s . o f

-

o f

s o m e t i m e s

fact,

s o m e

t o

is t h e r e b y

t r a n s p a r e n t

" r e j e c t i n g "

a c t u a l

97

r e m a r k . r e a d i n g

o n e

e x a m p l e ,

s t r e n g t h e n e d "

a l w a y s

n o

experts

n o n - r e f u t a t i o n

h y p o t h e s i s

o r

F i s h e r

p o t h e s i s .

B u t ,

null

o n e

n o t

g a v e

a s t a n d a r d

this

is

i n s t a n c e ,

it

b e

c o n f i r m e d

e l a b o r a t e d T h e

as t o

a n d

inference

l i k e l i h o o d

o r d e r , "

t h i n k

A . W .

b u t

g r e a t l y

E d w a r d s ,

t h e o r y ,

also

i l l - f o u n d e d ,

c o n t r i b u t e d

F.

h a i l e d

w r o t e

t h a t

t h o u g h

t h e y

t o

scientific

2 1 2 ) .

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

The

98

J .

E g o n

S.

P e a r s o n

G a l t o n a g r e e d

actively,

statistics.

I n

W a r s a w

years,

at

also

w i t h

l e d

eclectic. T h e y

F i s h e r

first

p r i n c i p l e s .

b e c a m e

i n d u c t i v e

r e c t i n g

d e a t h

s a m e

in

a n d t h e

as

l i v i n g

lish

F i s h e r ' s

tific

t o

o f

"I

a m

v i e w

P e a r s o n

a n d

a

it

t h a t

w a s

t o

t h e o r y

o f

w e r e

b y

his

t o o

t h e o r y

1 9 2 2 b ) .

B u t

t o w a r d s

L e b e s q u e " ) ,

strictly

p r o v i d e

B o t h

t h e m

a t t i t u d e

o f

o f

s o m e t i m e s t o

(Fisher,

s t u d e n t

o f

c o u p l e

B o t h

it s e e m e d

E u r o p e a n

in

city,

statistics.

b e c a u s e

m o d e l

issues

i n t e l l e c t u a l

t h e o r e m .

p a r t

dis-

s a m e

n e x t

ideas, especially

t r i e d

a n d

d e d u c e d

this

i n

"statistical

d e b a t e

this

t h a t

t h e i r

real

scientific

" t h e

f r o m

w h i c h

in

a n d

m a n y

h e

t h a t

k n e w

r e p o r t e d f e u d ,

w i t h

b u t

F i s h e r

k i n d , "

felt f r o m

w h a t

later

i n f e r e n c e

w h i c h

h e

w o r k .

v e r y

t h a t

h e

t h e y w a s

H i s

t h e

as

e d i t e d ,

F i s h e r

w e a k n e s s in

o f

a n y t h i n g

little" a n d c o u l d

m a r k e d

t o

S.

n o t

w a s

e x p e r i e n c e

P e a r s o n l o n g

d e c l i n e d since

t h r o u g h o u t

a n d

f r o m

h a d

P e a r s o n

this

a n d

scien-

u n w i l l i n g n e s s o t h e r s , see

t r i e d

t o

a v o i d

a b o v e a

p u b -

F i s h e r

3 ;

b y

w a s

t o

p .

stay

f r o m

d i s a g r e e m e n t

f o r g a v e

1 9 5 6 ,

t o

r e p r o a c h

i n s u l a t i o n

p o s s i b l y

l e a r n

u p

t h e

his m a t h e m a t i c a l

(Fisher,

E.

this

self-criticism,

c o r -

f r o m

w i t h o u t

h a d

n e v e r

R i g h t

s a m p l i n g

F i e r c e

P e a r s o n

as

N e y m a n - P e a r s o n

r e c u r r i n g

r e f l e c t e d

p r o b l e m s . K a r l

h a d

o f

" r e p e a t e d

w o r k

t h e o r y

significance.

m a t h e m a t i c i a n s

i n c a p a c i t y h e

o f

c o n c e p t s

years,

t e r r i b l e his

tests

b e h a v i o r . "

m e r e

P e a r s o n ' s

possibility

i n v o l v e d

s e c o n d

N e y m a n - P e a r s o n

o n

k e y

w e r e

F o r

in

t h a t :

( 1 9 6 7 )

t h e

t h e

i n Biometrika,

f l o w e d

o f

w o r k

" i n d u c t i v e

w i t h

e r r o r s

t h e

e m e r g i n g

o w n

o f

sciences,

N e y m a n

t h e i r

n e w

t h e

i n f e r e n t i a l

b e c a u s e

statistical

say,

p o i n t

t h e

P e a r s o n

w o r k

h e l d

w o r k

b i o l o g y ,

in p a r t

s o n

U n i v e r s i t y

in

p e r s o n a l

in

f a t h e r ' s

a n d

t h e

t h e

B a y e s '

c o n t i n e n t a l

t o

r e j e c t e d

statistics.

o u t

h e

a d m i t

a

S.

his

" e r r o r s

c o n t a c t

n e w

slight;

a

o f

w o r k ,

N e y m a n - P e a r s o n

h e

a n d

n a t u r a l

p o i n t e d

E .

p e r c e i v e d

1 9 6 2

s u c h

n o t

t o

as

u s e d

u s e

Fisher's

o f

h a d

u n i f i e d

i m p r o v i n g

N e y m a n

t h e

all

a

p o p u l a t i o n , "

t h a t in

( h e

t h e

at

O v e r

o f

his

f u n d a m e n t a l

A g r i c u l t u r e

a

at

F a t h e r

l e c t u r e r

s c h o o l

a n d

b y

o f

m o s t

L o n d o n .

P e a r s o n ' s

c o n c e p t

w h o

H e

n e v e r

a n d

t h e o r y ,

o f

t h e

f o r m e d

n e w

w o r k e d

L o n d o n .

y o u n g

in

a n d

b e h a v i o r . "

F i s h e r

his

l a c k e d

k n o w n

w h o l e

K a r l

his

r i g o r

t h a t

a

o f

C o l l e g e

criticism

N e y m a n ,

a

P e a r s o n

i m p r e s s e d

a n d

m a t h e m a t i c a l

N e y m a n ,

P e a r s o n

P e a r s o n ,

s o m e

a s s u m p t i o n s ,

w e r e

e s t i m a t i o n

especially

t o

S.

C o l l e g e ,

L a b o r a t o r y

w i t h

B a y e s i a n

E g o n

K a r l

a b o u t

E g o n

F i s h e r ' s

dissatisfied

i n v o l v e d

o f

a n d

t h a t

o f

C e n t r a l

G a l t o n

experts

a n d

U n i v e r s i t y

t h e

N e y m a n

a g r e e d

at

s o n

h o w e v e r ,

at

t h e

f r i e n d s h i p

t h e

1 9 2 5 , J e r z y

a n d

a r r i v e d

N e y m a n

w a s

L a b o r a t o r y

inference

t h e

b i t t e r

e v e n

also

in

4.4).

g e t t i n g

fray,

a n d

p e r s o n a l

t o n e .

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

The

A l r e a d y F i s h e r

i n

h a d

statistic

n o

late

v a l u e

vations.

B u t

f e a t u r e

o f

F i s h e r

significance basis

b y

c h o o s e b e

F i s h e r

h a d

d e f i n e d

w h e n

k i n d . "

T h e i r

e r r o r ,

t h e it

t r u e . o f

false.

T h e

test

o f

j e c t i o n

a n d

R .

G i v e n r a t i o n a l t h e

o f

d e s i r e d h e r e

a n d

-

first

s m a l l o f

t w o

s h o w s

t h e i r

sets

a n d

statistics

i d e a

it t u r n e d

o f

o f o u t

If

t w o

t h e

a n

o f

b e

d e f i n e d .

h y p o t h e s e s

R

u s e

a r e j e c t i o n b o t h

-

a

r e g i o n

t o

t h e o f

m e t h o d s

o n e

d i s t r i b u t e ,

a r e

called

in

h i m ,

n u l l

h y -

t h e

first

k i n d

a n d

R ,

p ( R ;

t h a t

b y

a

o f

a n d

s e c o n d

o f

k i n d ,

i d e n t i f y w h i c h

for

a

I n

(If

rejects

o f

,

1—p.

a

t h e

first

a n d H]

called, r e j e c t i o n

a n d

p

a r e

k i n d ,

t y p e - I I

o r

e r r o r .

strategies,

a

i m p o r t a n t t o

k e e p

t h e

R

t h e

r e g i o n case

a

r e -

Hx

a r e t h e

t h e

H2

a c c e p t s

o f

b y

reject

a n d

o f

c o n s i d e r e d

p r o b a b i l i t y

l e m m a o n e

t o

is

basis

so-called

w a n t s

s i m p l e

specify

viz.

m o r e

r e j e c t i o n

t h e

t h a t

t h e

o n e

t h e

o n e

o r

t h e s e

o n

H2)

is,

e r r o r

o f

Hl

t h e

R , o n e

o u t s i d e

a n

exists.

h e l d ,

distri-

N e y m a n

a n d

h y p o t h e s e s

is

c o m p l i c a t e d . )

a b l e

o f

t h a t

h y p o t h e s e s ,

f u n d a m e n t a l

a l w a y s

m o r e

a n d

s e a r c h

o f

m e a n s

t h e y

a n o t h e r

a c c e p t i n g

t o

test,

for

set

a

o f

a c c e p t a n c e / r e j e c t i o n

o n e

a

h y p o t h e s i s

H , )

First,

s u p p l y

N e y m a n - P e a r s o n

t w o

t h e

t o

t h e

" e r r o r

o b s e r v a t i o n s ,

p o w e r f u l .

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t h u s

b e

1 9 5 8 ;

in

a

yield.

n e e d

o f

o f

a

rival

a

p o w e r , a n

m o r e

this

a n d

P e a r s o n

m o r e

m u s t b y

b e

t r u e ,

a n d

w h e r e

t o

c o m p l e t e

h a s

d e s i g n .

f r a m e w o r k

s u c h

b y

t h e

b e

t o o

a

s e m i -

a r e

i n d e -

o f

g r a i n .

t h e y

a n d

o n e

o n l y

it

trap o s -

r e q u i r e d i n f o r m a l l y

T h e for

t o

b e e n

t h a t

m a k e s t h e

h a d

c o n s i s -

a l r e a d y

T h i s

h a d

in

o f

p o i n t ,

a l l o w s

calculate

F i s h e r

e x p e r i m e n t a l

b u s h e l s

p r o c e d u r e

e l i m i n a t i o n . "

test,

t h a t

b e l i e v e d

It a

c h o i c e

n o t

e v e n

w h i c h

h y p o t h e s e s .

scientific

o f f s e t

c o m p l e t e

h y p o t h e s i s ,

h a v e

science,

m a y

T h u s

t h e

d i s c o r d -

a

t h e

just

c o n c l u s i o n s

a n d

t e s t i n g

b e t w e e n

o f

B u t

o f

b r e a k - e v e n

a r e

fertilizers

N e y m a n

h o w

i n t o

a

fluctuations.

w e

t h e

o f

that.

will o f t e n

a p p l i e d

b y

fertilizer

s h a r p

" i n d u c t i o n

g i v e s

d e f i n e d

d o

t r e a t m e n t

clear

a n

t h e

e r r o r s

c a n n o t

w e

g o

assert

t h e

m e a s u r e

it is n o t

case

t h e

p r i c e s

o f

t o

o f

m i x e d

h y p o t h e s e s

sensitivity

a w a y

t h e

significance

d e s i r e d

science

t h a t

t o

p o w e r

i n

t o

o f

w e

simplistic

c o n s i d e r a t i o n s

w h i c h

c h o i c e

t h a t

Similarly,

a g r o n o m y ,

i n

w h e n

o u r

n e e d

i n c r e a s e

i n t r o d u c t i o n as

t h u s

w a n t

i n t e r p r e t a t i o n

o f

t r u e

m a y

m a r k e t

rarely

c o g e n c y

a p p l y i n g

t h e

w a y s

t h e o r y

t h e o r y

I n

s u b j e c t

s u c h

t h e

o f

o f

p r e s e n t

t e s t i n g

a c c e p t e d

t o

is

costs

t h r e e

F i s h e r ' s

test.

a l t e r n a t i v e

t h e s e

t h e

utility

a

p r i c e

s c i e n c e

a n d

h y p o t h e s i s .

o f

p r e s e n t

its

it r e m a i n s

w e

t h e

c o n s e q u e n c e

t h e

t h e

a n d

loses

h y p o t h e s i s ,

c o n t e x t size

a p p l i c a t i o n

0 . 2 1 , "

k i n d

u s e d

sible

b e

t h e

1 9 5 7 ) .

test

w e

calculate

i n v o l v e s

test,

p o w e r

as a d i s j u n c t i o n ,

m a d e

t h e

o f

e x a m p l e

w h e r e

t h e

T o

1.86,

1 9 7 7 ) .

H o w e v e r ,

as

size.

it

a b o u t

h y p o t h e s i s ,

a n d

is

o f

w o u l d

C o n s i d e r a t i o n s

C o h e n ,

t h e

T h e r e

alleviate

a p p r o a c h

r i g h t

t h a n

L i e b e r m a n ,

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p o w e r

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a n d

b e c o m e s

t h e

0.6.

t h e

experts

l a r g e r

c o m p l i c a t e d ;

0 . 2 1 , t h e

0 . 0 1 ,

reject

is

( R e s n i k o f f

t h e

=

/ - v a l u e

a p p r o x i m a t e l y

r e j e c t i o n

is t h a t

a

inference

N e y m a n -

p l a n n i n g

e x p e r i m e n t .

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

a n

The

S e c o n d ,

t h e

calculated original h a v e a

f r e q u e n c i e s

o n

t h e

m a t h e m a t i c a l

t h e r e f o r e

a

h y p o t h e t i c a l

first

k i n d

belief

if

her

that,

in

s e n s e

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sively

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u s e d

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sive

that

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e v i d e n c e

c o g e n c y ,

o f

is

T h i r d ,

in

B a y e s i a n

d i s c o r d a n c y

called

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t h e

w h e r e a s tive

i n f e r e n c e "

h y p o t h e s i s esis,

as

N e y m a n , h a d

b e e n

a r g u e d ,

is

p o t h e s i s t o

a

o f

basis

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as

t h e o r y

a

strictly are

e x a c t

data w a s

w i t h

exist

T h e

t h e

null

p e r h a p s , e r r o r

o f

Recall

t h e

data c a n n o t

still t h e

Fisher's

a p p r o p r i a t e

in a n y

reality,

realistic

b e i n g

T h e r e f o r e ,

e x c l u -

after

t h e

statistics)

m a y

r e s p e c t

t o

t h e

r e l e v a n t

w h i c h

b e

m o r e

analysis). T h i s

in particular

w i t h

p.

r e m a r k

o n

9 2 ) ,

t h e

l e d

a

t h e

r e p e a t e d

b e

F i s h e r

c i r c u m s t a n c e s ,

c o n f u s e d

deci-

force,

that

o r

O s k a r

s a m p l i n g

I n d e e d ,

if

t h e

i n f e r e n c e

c o n c l u s i o n

that

m u c h .

f r e q u e n c y

o f g e t t i n g

it,

p r i n -

is

B u t

t o

t o w a r d s calls

t h e

this is

( H a c k i n g ,

b o u n d t h e

it right.

t o

b e

o n true.

w h i c h

t h e

o r

o f

m a y

t h e

o n e

a n d

o r

it.

N e y m a n

action,

h y -

h y p o t h e s e s " m a y

b e

o n

a

t h e at

i n f e r e n c e

is

is

i n f e r e n c e

b a s e d c a n n o t

p r o m i s e

m a k e s

b e

l o o k e d

i n f e r e n c e

c a n

a

p e r h a p s

s e n t e n c e s w e l l

t o

W h a t

reject

o f

a

h y p o t h -

o n

d e d u c t i v e

t h e o r y

d e c i s i o n

" i n d u c -

t h e

b e h a v i o r

I n d u c t i v e

N e y m a n - P e a r s o n S u p p o s e

sets

test,

a c c o r d i n g

a c c e p t

v a r i o u s

V a l i d

If

o f a n y

a

a s a m p l e

d e p e n d

a particular

t h e o r y

t o

inference,

assertion

1 9 8 0 ) .

p r e m i s e s

o r

i n f e r e n c e

t h e

s a m p l e .

t o w a r d s

c a n n o t

t h e

f r o m

a p p l y

inference,

T o

take

m e a s u r e s

refrained

t h e

quasi-

i n t e r p r e t a t i o n

p o w e r

a t t i t u d e

behavior.

Fisher's

b e t w e e n

r e a s o n i n g

N e y m a n - P e a r s o n

t h e

o f

relation

science

i n f e r e n c e

if

that

a n d

i n d u c t i v e

a d e c i s i o n

o n e

size

m e n t a l

inductive

a t t i t u d e

W h e t h e r

g u a r a n t e e

evidential

their

o n e

is a p r o p e r t y

i n d u c t i v e

called

o f

as

s o m e h o w

h y p o t h e s i s ,

c o n c e p t s

h a v e

s a w

significance

b e

t o

P e a r s o n

behavioristic

level

t o

t r u t h - p r e s e r v i n g : its

o f

therefore,

b e t t e r

a s s u m p t i o n s ,

true,

o f

t h e

probabilities

a n

faultlessly).

in

(ancillary

a n d

and,

particular

o f

c o m m i t

o b j e c t i v e

1 9 5 6 ,

level

a p u r e l y

w a n t e d

taste.

t h e

are

s a m p l e

attack

a certain

1 9 5 7 ) .

a n d

i m a g i n a t i o n . "

n o t

N e y m a n

is " a n act o f w i l l o r

( N e y m a n , m a t t e r

frontal

k i n d

d i s t r i b u t i o n s

p o p u l a t i o n

" n o

w h i c h

d e t e r m i n e s

really

runs

s e c o n d

( a l t h o u g h ,

(i.e., a c o n d i t i o n a l

(Fisher,

w h a t

t h e

t h o u g h t

a s s u m e

w i t h

w i t h

significance

c a n n o t

t h e

n e v e r

t h e

the

a n

Fisher

will

has

is i n f e r r i n g

that

o f

a n d

p r o b l e m ,

always

s h o u l d

a

interpretation.

Fisher's

first

1 9 7 6 ) .

o f

statistical i n f e r e n c e e p i s t e m i c

o f

calculated

e v i d e n c e "

place

v i e w

a n d

features

( K e m p t h o r n e ,

t h e

statistician's

o b t a i n e d ,

has

t h e

analysis o f e x p e r i m e n t a l

i n f r e q u e n c y

s u c h

K e m p t h o r n e ciple

b e

o f

i n t e r p r e t a t i o n

process

a s u b p o p u l a t i o n

c a n

o f

applications,

t h e

certain

probabilities say

o f

103

s a m p l i n g

m a n u f a c t u r e r

repeatedly,

p r o d u c t

is

r e p e a t e d

p r o d u c t i o n

the

experts

errors

f r e q u e n c y

the

for

t h e

specification

scientific

s a m p l e

o f

o f

direct

o n e :

statistical m o d e l

t o

basis

inference

is

t o

h i g h assert

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104

The

o n e

o f

t h e

, t

o r

H

H

1

at

least

m a d e a n

p o s s i b l e

"

2

o f

rule

a s s u m i n g a n d

i n g

still m a y

able

t o

t h e

that,

call

as a t h e o r y

a role

i n t o

t o

play.

q u e s t i o n

a n d

N e y m a n - P e a r s o n

least H2

t h e

d i s c o r d a n t

,"

t h e

,

for

it

right

is a l s o

t h r e e

t o

1 9 5 7 ) .

v a r i o u s

r e i n t e r p r e t e d

c e d u r e s ,

a n

Fisher

Russians

[who]

1 9 5 5 ,

his

tests

p o i n t

l i k e n e d

o f o f

are m a d e

t h e

o f

n o t

a

true

s t a t e m e n t is

significance tests

m o d e l ,

test-

that

t h e w i t h

w h o l e b o t h

H ,

data

are

t h e

t h e

d i s j u n c t i o n

t h e

third

b y

t h e

" H ,

k i n d :

rejected

t e r m s

v a l u e d

m o d e l

e a c h

o f

t h e s e

h a d

m i s -

a c c e p t a n c e

p r o -

N e y m a n o f

e x p e d i e n c y

o v e r

truth.

science

technology has I think m a d e

it easy t o c o n f u s e

for drawing correct conclusions, with

us

production,

N e y m a n ,

for

his

m a t h e m a t i c a l l y is

less

t h a n

their

size

a n d

o f

errors,

c o n f u s e d

w i t h

significance tests latter f r o m

a n d as

scientific

a b o u t .

o n l y

p h a n t a s y research"

o f

s e n s e

a

' w o r s e

tests v e r y circles

( 1 9 5 6 ,

p.

1 9 6 5 ,

in

d r e w o f

[i.e. 1 0 0 ) .

p .

9 9 ) .

field

n o

"

tests since

line

a n d o f

in

b e t w e e n

P e a r s o n ,

m a t h e m a t i c i a n s ] P r o p o n e n t s

o f

prolet

a

p o w e r

a c c e p t a n c e as

costs

n o t

b e

tests

o f

significance ridiculed

because

o t h e r

in

their

m u s t

his

rather t h e

"are

is w h a t

a n d

application

the

r a t h e r at,

s u c h

a n d

w h i c h

great

70).

A l t h o u g h

role

sciences,

b o l d

N e y m a n

limited

p.

Fisher's

useless,'

play

t h e a

1955,

utility c o n s i d e r a t i o n s

t h e s e

i n f e r e n c e

o f

t h a n

require

a r g u e d ,

(Fisher,

s o m e

H a c k i n g ,

Fisher

h y p o t h e s i s

h a v i n g

"the

Fisher

m o n e y

that

c o n t r o l

i n d u c t i v e

are

t h e

(see

quality

saving

said

specifiable

p r o c e d u r e s p o s s i b l e

part,

or

those aimed

can

organ-

. . [While] in the U.S. also the

cess appropriate say, s p e e d i n g

o r

g i v i n g

w r o n g

the ideal that research in pure

plan for the nation.

importance o f organized

are

t o

familiar w i t h

five-year

i m -

t h e o r y

and should be geared to technological performance, in the comprehensive ized effort o f a

is

r e g i o n ,

qualification

b e l i e v e d in

p

w e l l - d e f i n e d .

Fisher

H e

a n d

rejection

h y p o t h e s i s

a s k e d

significance

N e y m a n

small

is d i s c o r d a n t

is

that

o f

still n e e d

reject

1 9 5 6 ) ,

v i e w

p r o b a b i l i t y

N e y m a n - P e a r s o n

m a y

error

" i m p r o v e m e n t s . "

i d e o l o g i c a l

I n d e e d ,

(e.g.

w o u l d

h o w e v e r ,

w i t h

inference,

that

a n

o f

o f

a s s u m e d

q u e s t i o n ,

probability,

a n d

t h e

statistics

a v o i d

a s s u m p t i o n

is c h o s e n

latter

test will a c c e p t

t o

t h e

asserting

i n d u c t i v e

w e

If

c h o i c e

T h e

w h o l e

w r o n g

p u b l i c a t i o n s

o f

true.

F o r

practice,

t h e

Its

" c o r r e c t i o n s "

t a k e n l y

In

o f

."

2

a

a n d

o b s e r v a t i o n

i m p o r t a n t

a n s w e r

( K i m b a l l , I n

w i t h .

a n

I f b o t h

a c c e p t s

t h e

If o n e

2

m a k e s

b e

"H

h y p o t h e s i s

d e s i g n

if o n e

disjunction. H

1—(5.

t o

e v e n

o r

true

f r e q u e n c y

p r e m i s e s

t e s t i n g h a v e

a n d

h i g h

" H , "

t h e

e x p e r i m e n t a l

w i t h

s h o w s

h y p o t h e s i s

1—a

experts

h e r e

will assert

o f

t h r o u g h

i n f e r e n c e

p o r t a n t ,

o n e

m i n i m u m

small,

results,

c o n c l u s i o n s ,

is t r u e ,

t h e

inference

t h e

d e r i v e d

r e m o t e

f r o m

c a m p ,

h o w -

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

The

ever,

a r g u e d

t h e y

h a d

p a p e r

that

s i m p l y

p r e s e n t e l e m e n t t h e

lapse

is t h e o n e

o f

i n v o l v e s

o f

Fisher's

o v e r b l o w n

u p

t h e

witnesses.

T h e

that

a n s w e r ,

P e a r s o n

" d o e s n ' t

itself

t h e

t h e

p o t h e s i s

o f

A s

o f

g r e a t

for

tests

B a y e s i a n s

a n d

u n r e s o l v e d h a v e h a v e

o f

class o f o f

a

u s e

" T h e

o t h e r .

in

are

a

tests

title o f

t o

the

m e .

T h i s

h y p o t h e s e s ,

I f

this

c o n c e p t u a l

is

n o t

a

d i s t i n c t i o n "

p .

t a u g h t

less

significance

test

n e e d

a n d

as

i g n o r e d

b y

is

n o t

c o n c e p t u a l

t o

as

m o s t

r e g i o n ; t h e

in

t h e

that

a

w h i c h

t h e

H e r e

test

w h a t

e x -

say

.05,

original

c o s t - b e n e f i t

h y -

m a d e

a

c o n s i d e r -

c o n c e i v e d

m e r e l y

it

will

G o s s e t

first

I n

r a n d o m l y

. 0 0 0 0 1 :

that

a n d

Fisher.

d r a w n

t h e y

l o w

h a v e

o n e

l i k e l i h o o d

a m b i g u i t i e s ,

a n d for

P e a r s o n

e x i s t e n c e

t e x t b o o k s .

-

for

t h e

A s

that a n d

f r o m

c u s t o m e r -

t h e

o f

all o f

t h e s e

p e r s o n a l

in-

t e x t b o o k s

e x p e r i m e n t e r

F i s h e r in

e n d e d . b e t w e e n

t h e

in

t h e

B a y e s i a n s

a

n o t

r e l a t i o n s h i p

r e m a r k a b l e

j u d g m e n t

N e y m a n

c a m p s .

probability,

s u p p r e s s e d

t h e

their

l i k e l i h o o d s . "

is e s p e c i a l l y

t e s t i n g

w e l l

it

b o t h

h a d

say

w h o

t h e

a rejection -

m a n

t h e

c o m p l e t e l y

for

for

characterized

for p e r s o n a l

statistic;

p r o b a b i l i t y w e r e

o r

n o t

a n d

it

issues,

o f

2 4 3 ) .

c o n t r o v e r s i e s ,

h a v e S o

small,

c o n s i d e r

t h e

"that

ratio

v i g o r o u s

it,

as

n o t

b e

b r e w e r s ) ,

h y p o t h e s i s

p.

a l t h o u g h

u r g i n g t h e

t o

1 9 3 8 ,

p u t

is

parties

t o

stating

a r e a s o n a b l e

i n c l i n e d

8 3 )

s a m p l e

"childish"

research

t h e

spirit

n e v e r

B o t h

b y

w i t h

G o s s e t

as

G a u s s ,

c l a i m e d

is v e r y

w i t h

P e a r s o n ,

n o w

m o r e

t h e

d e b a t e

w e s t . "

a n d

s a m e

alternative

s a m p l e

frequentists.

b e e n

c o n c e p t i o n s ,

a n y

t h e

G u i n n e s s ,

f r o m

t h e

p o s i t i o n

c o n c e r n e d

c h a n c e

is

in

w a s

t h e

that

t h e

S.

c o n t r o v e r s i a l

in

p o l e m i c ,

Laplace

for

letter

m o r e

h e a t e d

h y p o t h e s e s

p r i o r

t h e

rather

w e r e

less

a n d

if

as

G o s s e t

test

a

t h e r e

w a s

sciences. T h e

m o d e l

his

( 1 9 6 5 ,

b u t

t h e n , n o

in t h e

t h e

N e y m a n ' s

"actively

p r o v e

(E.

s u c h

rival h y p o t h e s e s ,

H a c k i n g

D i s p u t e s

that

w h a t

m y s t e r i o u s

t h e

for

f r e e d o m

w o r k e d

m u c h

t r u e "

m a t t e r s ,

T h e s e ,

sults

v e r y

n o t

ations.

w h i c h

o n

b e c a u s e

instance,

tests o f statistical

learn

b r a n d e d

S.

m a n

e v e n

o c c u r r e n c e

p o i n t

a

necessarily

b e

H e

W .

p u b l i s h e d

if

is

o f

u s e d

that

s t r o n g

t h e

appears

t o

F o r

w r o t e :

talent

past,

( G o s s e t

G o s s e t

s h o w

will

t h e

as

p o p u l a t i o n

t o

. . . y o u

o f

h i m

c l a i m e d

plain

I h o p e

consistent.

N e y m a n

b e t w e e n

intellectual

a u t h o r i t y

s c i e n c e s "

is

t h e n

application,

" F o r

significance,

rhetoric.

h e r o e s

natural

d o e s

o f

o f

q u e s t i o n

that

r e m a r k a b l e

[for]

d e s c r i b e d

f r o m

tests

p e n ,

m o r e

t h e

e l e m e n t

d i s t i n c t i o n

a n d

" h o r r i f y i n g

F i s h e r

o n

fields

1 9 7 6 b ) .

for

called

t h e o r y

105

in

significance?"

a n

a p p a r e n t

experts

d i f f e r e n c e

a c o n f e r e n c e

s o m e o n e ' s

B e c a u s e

a n d

n o

Fisher's

tests o f

h a n d ,

( N e y m a n ,

lacked

t o

a n d

session

w a s

m a d e

p r e s e n t e d

o f h y p o t h e s e s

o n

t h e r e

inference

t h e

c h o i c e

c h o i c e

in

t h e

alternative c o n s e q u e n c e ,

o f

a

c h o i c e

statistical scientific

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106

The

r e s e a r c h e r s

in

m e c h a n i c a l

w a y ,

t h e s e

m a n y

T h e

f o r

sciences,

e f f o r t

especially

a n d

o r

B a y e s i a n I n

t e s t i n g

e x p e r i m e n t a l 1 9 3 5

t o

social ing,

of

it

t h e

w a s

t h e

w a s

o u t

s a y i n g

l o o k e d

level, t h e

t h r e e

a n d

b y

a n d t u a l u s e

B u t ,

a

m a j o r

t h e

h y b r i d

t e n d e n c y

issues

p e r f e c t l y

t h e

s o c i o l o g y ,

a n d

t h e o r y ,

w h i c h

h y b r i d

s o

w h i l e

as

o f

b e

b d o k ,

a n d

d i s t i n g u i s h i n g

in

r e s u l t s

a n d

since o f t e n

o v e r l o o k e d

t o

t h e

b y

p u t

t h e

o n

t h e o r y

t e s t i n g ,

in

a m o n g

w r i t t e n

i n

t h e

s t u d e n t s

in

t h e

se.

test-

f r o m

t h e

call

this

W e

a n d

it g o e s

w i t h -

P e a r s o n

w o u l d

h a v e

m a r r i a g e . t h r e e

levels

n o t

b e

a n d

u s e r s

-

m a t h -

t h e

first

s e p a r a t i n g a p p l i c a t i o n ,

b o t h e r e d

T o

s a m e

O n

issues

t h e o r y

g r e a t

i g n o r e d

significance

per

o n

1 9 5 7 ) . t h e

l i k e l i h o o d

F i s h e r

e x p e r i m e n t e r s .

T h e

in

t h e

c o n c e p t s

f o r c e d

n e e d

H o g b e n ,

o b t a i n e d .

o f

w i t h

b e t w e e n

statistical

c o n t i n u e s

c o n t r o v e r s i a l

p e o p l e

a n d

a n d

t e a c h

t h e o r y

u n d e r s t o o d

s o c i o l o g y

p a r t

i n f e r e n c e ,

t h e i r

t h e

significance

t o

f o u n o n

o n l y

stress

"statistics"

t h e

t h e

" c o o k b o o k s "

N e y m a n

r e s o l v e

( n o t e d

w e r e

o f

f o r m u l a e

b y

t h e s e

statistics, w e r e

d i f f e r e n c e s

in

u s e d

c o n c e p -

p l u g - i n - a n d - c r a n k - t h r o u g h

rules.

s e c o n d o n ,

level, w r i t e r s c o m m e n c e d

s h e l v e s

t h e o r y

N e y m a n - P e a r s o n m e t h o d ,

t o

q u e s t i o n s

i m p a c t I n

d e b a t e

m e r g e d

w r i t e r s ,

a c c e p t a b l e ,

n u m e r i c a l

statistical

t o

c a n

t h a t p r a c t i c a l - m i n d e d

t h e o r e t i c a l

s a m e

b y

t h e

t h e

statistical

o f f s p r i n g

t e x t b o o k

s c h o o l s

o n

T h e

this

q u a s i -

m a t h e m a t i c a l

m o s t

w i t h

F i s h e r ' s

t a u g h t

n o r

o n

t h e

1 9 2 5

t h e

w a s

F i s h e r

i n t e r p r e t a t i o n o f

first,

a n d

a

w h a t

intervals,

t o

t o g e t h e r

statistics."

n e i t h e r

s a y i n g

t h e

o f

t h a t

o f

f o r

his

in

a

sciences.

n o n - s t a t i s t i c i a n s ,

o f

w a s

this s e e m e d

b y

t h e o r y "

statisticians,

t h e r e

m a i n l y

largely

i n

S O L U T I O N

practically

d u e

o f

r e s o l v e d

" h y b r i d

c r e a t i o n

e m a t i c a l

p r o b a b l y e d i t i o n

historically

f a v o r

social

A l t h o u g h

silently

t o

t r e m e n d o u s

b e e n

p r o v i d e d ,

t h e o r y

a

c o n f i d e n c e

h a v e

is

first

h e

as

t h e

w i t h

T h e

t h e

" r u l e s

N e y m a n - P e a r s o n c o m p r o m i s e

this

p r o v i d e

b e c o m e

s u c h

Experiments.

1 9 6 0 s ,

sciences

w h i c h

in

d e s i g n

Design

statisticians, 1 9 4 0 s

p a r t ,

t o

t h e

h a s

i n f e r e n c e

tests

S I L E N T

h a d

a n d

t e s t i n g

a t t e n t i o n

T H E

h a s

b i o l o g y

statistical

a n s w e r .

statisticians

d e v e l o p m e n t s

e x p e r i m e n t e r s . significance

o n

a p p l y

a d e q u a t e

really

t e s t i n g

significance

o t h e r

f u n c t i o n ,

o f

h y p o t h e s i s

p s y c h o l o g y ,

his

t o

H Y B R I D I Z A T I O N :

d a t i o n

o f

g i v i n g

p r o c e d u r e s

i n t e l l e c t u a l

t o o l ,

experts

l e a r n e d

w i t h o u t

n u m e r i c a l

3 . 5

fields

inference

a n d

f r a m e w o r k .

t e x t b o o k s

p e a c e

s h e l v e s

c o m b i n e s

u n r e s o l v e d

o f

in

is

r e s e a r c h

issues

a n d

libraries

f r o m

p r e s e n t e d

c o n t r o v e r s i a l

e d u c a t i o n ,

n e g o t i a t i o n s

c o n c e p t s It

for

t h e

c r e a t e d n o w

p a y

F i s h e r i a n

a n o n y m o u s l y a n d

p s y c h o l o g y ,

a l t e r n a t i v e

as

a

h y b r i d t r i b u t e .

a n d

t h e

statistical a p p r o a c h e s

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The

t o

scientific

i n f e r e n c e

N e y m a n - P e a r s o n significance i d e a s

t h e o r y

t e s t i n g ,

b o o k s

w e r e

o n

readily w e r e

n o t

o f

i d e a s

w e r e

t r o v e r s y , w e r e

m u c h

n o t

p s y c h o l o g y ,

Statistics

w h o

is

w i t h

as

t h e

t h e i r

t h a t

a b s t r a c t

p a r t i e s

( w i t h o u t

n a m e s

a n d

o f

e v e n

at

t h e

in

-

w h i c h

list

is

e v e r y

t h e

v i e w e d

s o c i o l o g y a n d

t h a t E.

a l t h o u g h

c o n -

c o n c e p t s

u n u s u a l

p h e n o m e n o n logic

S.

s o m e

o f

t h e o r i e s

m o n o l i t h i c

t h e s e

s a m p l i n g )

crucial

v e r y

t h e

Fisher's

e x i s t e n c e

T h e

c o m p e t i n g

a l m o s t

t r u t h ,

d i s p u t e .

w i t h

N e y m a n

t h e m ,

h i n t e d

f r o m

r a n d o m

o f

issues

f o r

b o t h

a l o n g

t w e n t y - f i v e

c r e a t o r s

t h e m

c o n c e p t s

e d u c a t i o n ,

t h e

t e x t b o o k s

p r o p o s e d

t r e a t e d

N o n e

o u t

w h e r e

in

K e y

i n t r o d u c e d

c h e c k i n g

t h a t

m e n t i o n e d

s p e l l e d

are

p s y c h o l o g y ,

p r e s e n t e d .

less

p o w e r

f o u n d

1 0 7

i g n o r e d .

m e n t i o n i n g

f o r

w e

e v e n

i d e n t i f i e d

r e s e a r c h e r s

as

i n s t a n c e ,

statistics

P e a r s o n t h e i r

s u c h

F o r

available,

experts

c o m p l e t e l y

w i t h o u t

as i r r e c o n c i l a b l e .

t h i r t y

like

a r e

inference

i n

fields

a n d

t h e

d i s c u s s e d .

o f

i n d u c t i v e

i n f e r e n c e . T h e

h y b r i d

t h e o r y

c o n s t i t u t e

w h a t

t h e

o f

level

is

c o m e s

"scientific"

significance

N e y m a n

a n d

f r o m

n o n - s i g n i f i c a n t

a

P e a r s o n

a n d

n o t

t h e

a n

p a r t

e p i s t e m i c

t h e

w h a t

is,

F i s h e r

in

t h e

o l u t i o n "

t h e

t h e o r y

tests

p r e s s u r e

t o

1 9 7 0 ) .

a n d o f

e x p l a i n I n

o f t e n

G o s s e t ,

N e y m a n ,

tests

a n d

t h e

w i t h o u t

s t a n d i n g

o f

u l t i m a t e

p u r p o s e

o f

o f

e x p e r i m e n t

F i s h e r ) ;

t h e

h a s

h e

will

a n

w h e n

level

t h e

t h e n a n

in w h a t

M u r r a y ,

a n d

h a n d s

h a s

1987).

d e f e n d o f

t h e

i n t o

P e a r s o n

a

h a d

t h e i r

b e e n B y

n o t

m a d e

a n d

t h a t

called

t h e

g i v e n a b o u t

( c o n t r a r y t h e

n u l l

t o

d a t a ,

at

w i t h

h y p o t h e s i s

o c c u r s

fields,

u s i n g

t h e

w a s

n e i t h e r

m a j o r

in

b e h a v i o r a n d

" i n f e r e n c e

w e l l

t h e

o f

e s t a b l i s h e d tests

felt

( M o r r i s o n

a n d

t h e

d r a w i n g

r e s u l t

r e v -

u s e

h y b r i d

a l t h o u g h

s t r i k i n g l y

n o n - s i g n i f i c a n c e

t h e

e d i t o r s ,

ritual,

a significant

j o u r n a l s

significance

a g a i n s t a

o f

m i d - 1 9 5 0 s ,

levels

d e v i a n t

all w a r n e d

significance

a r e

d i d

significant

t h e

e d i t o r s

m e c h a n i c a l

s o m e

r e s e a r c h ,

b y

e x p e r i m e n t e r s

I n

n o t

P e a r s o n .

r e j e c t i o n

r e s e a r c h e r s

b u t

c o n f u s i o n

a r e

t h a t

e x p r e s s i o n a n d

c o n c l u s i o n s

i n s p e c t i n g

r e p o r t

specify

( f o l l o w i n g

e r r o r s

p r a c t i c e

d a t a

t o

i n t e r p r e t a t i o n

e n o r m o u s in

h e l d

m u s t

d r a w

t y p e - I I

i n s t a n c e ,

n o t e ,

T h e y

a n d

a r e

w r i t i n g s ,

b e h a v i o r i s t i c

t o

F o r

n o t

F i s h e r ' s

i n s t i t u t i o n a l i z e d

a n d

m u s t

t y p e - I

led

N e y m a n

j u d g m e n t .

statistical

t h e

c o n v e n t i o n a l

d e g e n e r a t e d a n d

c o n d u c t i n g

level,"

curricula,

r e s e a r c h ,

t h e o r y

f r o m

w a s

( G i g e r e n z e r

s o c i o l o g i c a l

H e n k e l ,

w r i t i n g s

u n i v e r s i t y

significance in

t h e

r e s e a r c h e r

a n d

o f t e n

t h a t

T h e

level.

0 . 0 1

p r e s c r i p t i o n s

"objective."

c o n v e n t i o n a l

t h e

o f

N e y m a n ' s

h y p o t h e s i s .

at

list

( f o l l o w i n g

T h i s

significance

n u l l

h y b r i d

in

a

" r e j e c t e d

T h e a n d

o f

t h e

n o r

o n .

h y b r i d ,

s t r i n g e n t

t o

say,

s o

a

t h a n

r e s u l t

e x p e r i m e n t e r s

m o s t

r e s p e c t

b e f o r e

i n t e r p r e t a t i o n .

m e a n i n g

p r e s c r i p t ) ,

o f

a n d

r a t h e r

N e y m a n - P e a r s o n ) ; b e c o m e

w i t h

F i s h e r ,

i n f e r e n c e s

n a r r o w

u n d e r -

s e e m

b e

s i g n

o f

t o a

t h e

b a d l y

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

108

The

inference

c o n d u c t e d

e x p e r i m e n t

-

6.3).

practice

n e g l e c t i n g

T h i s

d e r i v e d

directly

Experiments: p e r

p a r e d

f r o m

"It

cent,

is

i g n o r e

t o

usual

all

e l i m i n a t e

t u a t i o n s

w h i c h

results"

( 1 9 3 5 ,

§ 7 ) .

n o t i c e

direct

c o n t r a d i c t i o n

t e s t i n g a n d s a m e

say,

a n

t h e

social

rejected

f u r t h e r

F i s h e r

S i n c e

t h e

sciences.

w i t h

a

clearly

for

t o

their

B u t

relation

that

b e p u b l i s h e d , w h i c h o f

results

d e c l a r a t i o n o f

a

t y p e

o f

t h e

s u b m i t t e d

that

" t h e

for

i n v e s t i g a t i o n

in

b y

this

t h e

t h e

fluc-

practice

o f

is

in

significance

p r e s e n t e d

t h e

d e m o n s t r a t i o n

of,

c o n f i r m a t i o n f o l l o w

that

literature

w a s

n o t

o f

t h e

q u e s t i o n "

b y

n o n -

will

has

c o r -

led

t o

h e e d e d

in

p u b l i c a t i o n

sensitivity

p r e -

e x p e r i m e n t a l

e x p e r i m e n t

Fisher's w r i t i n g s

5

in

w o u l d that

t h e

this r e a d i n g

r e q u i r e d

s o

o f

of

are

a n d ,

b e t w e e n

e x p e r i m e n t a l

it

t a k e

t h e y

p a r t

s a n c t i o n

results.

laboratories,

w i t h

t y p e

g r e a t e r

b e e n

Design

t o

that

(see

h a v e

The

standard,

i n t o

p h e n o m e n o n

i m p l i c a t i o n

t h e

s e n s e

o f a natural p h e n o m e n o n ,

also

N e g a t i v e

facile

t h e

m a y

Fisher's

this

t h e

s e e m s

o f

in

t h e

r e a c h

insignificant

o t h e r

results. T h i s

in

t h r o w n

t h o u g h t

f r e q u e n c y

t o

p u b l i c a t i o n

e x p e r i m e n t e r s

h a v e

p s y c h o l o g i c a l in

for

o f

results

p a s s a g e

d i s c u s s i o n

analysis

h e

c h a n c e

n o n - s i g n i f i c a n t

fail

causes

d e m o n s t r a t i o n

[is] s u b s t a n d a r d p.

f r o m

his

n o

significance,

w h i c h

results s h o u l d

reflect

o f

results

e x p e r i m e n t s

significant

level

t o

a l m o s t

c o n v e n i e n t

statistically

section.

significant rectly

t h e

o f

i n t e r e s t i n g

similar

a n d

H e r e

n o

w i t h

ill-considered

c h a n c e

t a k i n g

v e r y

a n

as a s t a n d a r d

t o

m e a n s ,

o f

h e n c e

experts

are

o f t e n

e x p e r i m e n t

( M e l t o n ,

1 9 6 2 ,

5 5 4 ) . A s

a n

h y b r i d o n l y

a p p a r e n t l y

t h e o r y

f o r

v i v e d

o n e

that

( M e e h l ,

t h e

f r o m

d e s i g n s

a n d

for

W h a t

is

discipline

a n d

o f

h o w

d o

t h e

s t a n d a r d s

universally

b e c o m e s

m u c h

t h e

its

i n c e p t i o n

in

t h e s e

is o f

b e

t h e

t h e

discipline?

o f

o f

T o

o f

c o m b i n e d ?

A r e

t h e

fact, if

a n d

o n e

sur-

a n d

t h e

a n d

q u e s s u b -

aspects

N e y m a n

o f a n d

e x p e r i m e n t a l

b i o l o g y

really a

g o o d

sciences? w i t h i n

e a c h

d e m o n s t r a t i o n the

has

h a r d

w h a t

a n d

1 9 8 6 ) ,

P o p p e r i a n s

t h e

Fisher,

scientific

It

a n d

If

a c k n o w l -

statistical significance

social

c o m p l e t e

data,

s c h o o l ,

1 9 6 3 ) ,

t h e

1 9 4 0 s .

( B o x ,

unlike.

s u p p r e s s i o n

c o n f i d e n c e

In

s a m e

c o n c e p t u a l l y

in agriculture

in

t h e

N e y m a n - P e a r s o n

t h e

t h e

e c u m e n i s m

t o

S a v a g e ,

ideas

defined. less

since

scientific

statisticians

r e m a r k a b l e

k n o w l e d g e ,

b e t w e e n

t h e

can

statistical

are

p e r m i t s

t h e

o f

d e f e a t e d

a n d

relation

b o d y

a p p r o a c h e s

a p p r o a c h e s

e x p e r i m e n t a t i o n

m o s t that

objectively m e t h o d s

all

b y

easily

different

w i t h i n

e n t e r p r i s e

d e v e l o p e d

has

d o m i n a n c e

i m p o r t a n c e

appeal,

it

attacks

L i n d m a n ,

if any, is t h e

scientific

m o d e l

Its

all

p r o p o n e n t s

( E d w a r d s ,

tions. W h a t ,

P e a r s o n ,

t h e

d i f f e r e n t

1 9 7 8 ) .

stantial

reasons,

applies

attacks

B a y e s i a n s

t h e

s u r v i v e d

practical

in w h i c h e d g i n g

has

n o n - c o n t r o v e r s i a l

social-science

h a v e

standardization l o o k s

across

o f

n o w

b e e n

statistical

disciplines.

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I n

The

e c o n o m e t r i c s , tively

rare,

o f t e n t h e

t o

t a k e

a n d

b e e n

t h e

a p p l i e d

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w i t h i n

t o

ematics.

v i e w

T h e

p r o v i n c e

3 . 6

u s e

o f

statistical

m e t h o d s

o f

o f

w i t h

t h e

basis

p l i n e s

f o r

a n d

a n

a p u b l i c a t i o n

U

Statistics

t o

W e s t - G e r m a n

i n t e r n a t i o n a l

B e s i d e

h a v e

t h e i r

b e i n g o f

t h e

R o y a l

tics, o r

d e p a r t m e n t s , a r e find

Statistical

in

statisticians

w h e t h e r

t h e

m o d e l e d

u s i n g

1 9 7 8 ;

D e G r o o t

T h i s a s p e c t s . a s k

h o w

T w o

o f

o f

b e c o m e o f

affect,

s o

s e e n

b y

m a t h -

practitioners

else's

c o n c e r n ,

t h e

I N T E L L E C T U A L

s u p p o r t s

a

Theory

f r o m

t h e r e

as

t h e

o v e r

1 3 0

Journal

of

in

as

a n d

m a n y

M o r e

c o u r t s ,

c o m b i n e d

in

(see

o l d e s t

7.4;

f o r

statiso t h e r

Statisticians a n d

a n d

t h e

Society

m a n y

a r c h e o l o g y .

t h e

t h e

Statistical

i n

for

c o u n t r i e s

o f

w o r k

o t h e r

S o c i e t y

d e p a r t m e n t

g o v e r n m e n t .

t h e o r y

o n e

t h e

statisticians

in

n o w

i n d u s t r i a l i z e d

a s e p a r a t e

e c o n o m i c s ,

und

B e r n o u l l i

1834

p r o b a b i l i t y

lists

Aligarh

are

o f

Abstracts,

Wahrscheinlichkeitstheorie

f o u n d e d

b e

disci-

Method

I n d i a n

M a n y

w i t n e s s e s

o f

p r o f e s s i o n

(ISI),

statistics,

a n d

b e c o m e

r a n g e

and

I n s t i t u t e t h e

s u c h

h a v e

h a v e

w h o l e

t h e o r e t i c a l

s h o u l d

w e

o f

statistics

call a u t o n o m y a

d i s c i p l i n e per

disciplines

like

a u t o n o m o u s ?

statistics,

b e e n

l o g i c a n d

e n o r m o u s

Statistical

I n f e r e n t i a l

as e x p e r t

b e c a m e

o t h e r

G r a d u a t e

m o r e

it is

d e b a t e d

c o u r t s also

w e

c a n

b e

E g g l e s t o n ,

1 9 8 6 ) .

t h e m

statistics

statistics

a n d

al.y

a n

1885),

i n d u s t r y ,

f r o m

t o

( f o u n d e d

o f t e n

e v i d e n c e

et

b y

h a s

m a t c h e s

r o u t i n e l y

m a t h e m a t i c s ,

fur

for

n o w

p r o f e s s i o n a l i z a t i o n

a p p e n d a g e

t u t i o n s

a c t i n g

i d e a s

It

Y

Zeitschrift

as p s y c h o l o g y ,

w a y

b e

t h a t

1 9 8 5 ) .

h a v e

s o m e o n e

Statistical

Society,

science,

M

P r o b a b i l i t y .

biostatistics.

s u c h

c o n s u l t a n t s

ISI

o r g a n i z a t i o n

f o r

O

t h a t

statistics,

a n d

U n i v e r s i t i e s

e v e n

N

o r g a n i z a t i o n s ,

Statistics

o w n

L o n d o n .

t o

t h e

statistical

M a t h e m a t i c a l

as

e x t e n d s

I n t e r n a t i o n a l

d e v o t e d

Gebiete.

O

j o u r n a l

m a i n l y

verwandte

T

a n d

j o u r n a l s

t h e

c o u l d

a c c o m p a n y i n g

p r o b l e m s

t h e

sciences

c o m p a r a -

analysis.

i m a g i n a t i o n

P R O F E S S I O N :

t h a t

a b s t r a c t i n g

o f

o f

( M c C l o s k e y ,

inference

m a t h e m a t i c s

t h e

e x p e r t i s e

statisticians. T h e

t e s t i n g

r e g r e s s i o n

is

specialists.

a n d

p r a c t i c a l

lack

biological

S T A T I S T I C A L

i n f e r e n c e ,

a

is

e x p e r i m e n t

t o o l s as c a n o n i c a l , g i v e n

A

Statistical

t o o l

w i t h

statistical

h i g h e r

statistical

T H E

a n d

109

c o n t r a s t ,

statistical

h y p o t h e s i s

social

t h e i r

experts

s t r i k i n g

e c o n o m i s t s

t h e

u n c o m f o r t a b l e

m o s t

s t a n d a r d b y

p s y c h o l o g i s t s '

s t u d e n t s

t h e

inference

a n d

m a n y

a s k

o t h e r

h o w

I n

a n d a n d se,

o f

i n f l u e n c e . w h e r e

s o c i o l o g y ,

o r

s e c t i o n

3.7,

statisticians

disciplines

statisticians

a n d

it

I n

w e

w e r e o t h e r

this

earlier

b i o l o g y .

h a s

c o n s i d e r a b l e

t o

social

s e c t i o n

h a d

T h a t

s e v e r a l

b e e n

is, h o w t h e

r e a c h

w e a n d i d

instio u t

t o ,

i n s t i t u t i o n s .

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110

The

W h e n c e n e e d s w a s

this

d i d

t r e m e n d o u s

it

satisfy?

it c h a n g e d

t i o n s

in

d e p t h ,

w e

experts

i n f l u e n c e ?

H o w

itself i n

inference

d i d

t h e

it

c h a n g e

p r o c e s s ?

will i n d i c a t e

W h a t

scientific

a n d

skills,

g u i d e

s o m e

a n d

c o n s i s t s

a n a l y z e

a n d

t h e

since

o f t e n

it

o u t s i d e T h e

in

tacit

d e v e l o p e d

b y

t h e

m e t h o d s

w o r k i n g

as a

M o s t ,

m o s t ,

u s e

f r o m

b u t

t h e

ability

a n d

tician,

since

o n e

n o t

of

a r e

e v e n

( T u k e y ,

1 9 6 8 ) ,

a r e

o f t e n

t h e m !

T h e

t w o

stract

t h e y

1 9 7 7 a )

p a r t l y

c a n

b e

historical w e r e

a r e

a p p l i e d

e v e n t s

idea,

b u t

t h e

f o r

d o

k e y

q u e s issues.

f o r m

o f

n e t w o r k

n o t

o f

u s e

t h e

v e r y

a b s t r a c t ,

r e c o g n i z e d

t h a t

in, m a n y

t h e s e

like. T h e y

n o t

e v e n

as

a b s t r a c t

o f

statistics

p r o b -

t h e

statis-

e x p l o r a t o r y

tests

( B r a d l e y ,

d o

t h e y

n o t

u s e

s o

a b -

a r e

d i f f e r e n t

t w o

d e v e l o p m e n t

clients

t h e

b u t

t h e y

b e c a u s e

a r e

i n t e r r e l a t e d

o f

statistical

a n d

for

c o n c e p t s ,

s u c h

fact

skills

abstract.

k n o w l e d g e

t h e m ,

a n d

skills

a n d

o f

t w o

t o

k n o w l e d g e ,

a n d

M a n y ,

Still, t h e s e

statis-

d a t a ,

T h o s e

a n d

t h a t

T h e i r

this

i n d u s t r y ,

o f probability\

o f

o f

goals.

scientists

a

k n o w l e d g e

g a t h e r e d ,

basis

a n d

m a t h e m a t i c a l

b y

w h i c h

t h e

h o w

i n f o r m a l ,

b e

j u d g m e n t .

n e t w o r k

h i g h l y

to, a n d

a n d

k n o w l e d g e

t h e

data,

d i s t r i b u t i o n - f r e e

t h r o u g h

s e m i n a l

o n

f e l l o w

model.

c h a r a c t e r i z e d

c o n c e p t s

w h a t

t h e s e

t h e

a n d

a p p l i c a t i o n

for

c o n c e p t

o r

a r e

s h o u l d

in g o v e r n m e n t ,

t h a t

a n s w e r

specialized

d a t a

s u b j e c t i v e

z statistical

m e t h o d s

t h e

a r e

t o

o f

specialized h o w

u s e s

t h e

c e n t r a l

t h e

in

c o n s u l t a n t

single

t o

f o r m a l

t h e o r i e s ,

o f

a n d

i n v o l v e d

t h i n k

i n f e r e n c e s

o f

n e e d e d

all, u s e

c o n c e p t

m o d e l ,

analysis

basis

statistician

w e

a b o d y

T h e

m a k e

d e g r e e

t r y i n g

i n s t i t u t i o n s ,

e n v i r o n m e n t ,

t h e

b y

d e t e r m i n e t o

t h e

a

a c a d e m i c

ideas.

t o

data,

o n

o f

c h a n n e l s

k n o w l e d g e

w o r k i n g s .

i n v o l v e s

r e s u l t

d e f i n e d

a n d

k n o w l e d g e

m e t h o d s

n o t

T h e

c o m p l e x

d e c i s i o n s

i n c l u d e

d a t a

a

s u m m a r i z e

p r o p o s e

d o

b y

its

disciplines

o f w h a t

is c h a r a c t e r i z e d

its d e v e l o p m e n t

ticians

t o

discipline

t h e

W i t h o u t

S p e c i a l i z e d

A

w e r e

s i t u a t i o n s .

c o n c e p t s as

a

w e r e

scientific

discipline. T h e

c o n c e p t

o f p r o b a b i l i t y

m a t h e m a t i c i a n m a t i z a t i o n p o r a t i n g [ 1 9 6 4 ] t o

a n d

that. a

u s e d

B u t

n o t

u s

f r o m O f

t h e

t h e i r

N .

c o n c e p t w a s

a p p l i c a t i o n .

w h e n

t h e y

a t t r i b u t e

set

t o

p r o b a b i l i t y a n d

l o n g

b e f o r e

A n d

implicitly it

(Shafer,

tied

t h e i r

t o

1 9 7 8 ) .

t o

S.

T h i s

N . o f

i n

w h o l e

f u n c t i o n s p e o p l e

b o o k

1 9 3 3

t h e

h a v e

p a p e r

S o v i e t

a n

a x i o -

b y

i n c o r -

( M a i s t r o v ,

h a d

r e f e r r e d

is a t e s t i m o n y

a p p e a r s

s o m e t i m e s t o

b y

B e r n s t e i n

h i n d s i g h t

p r o b a b i l i t y his

1 9 3 0 s

d e v e l o p e d

K o l m o g o r o v ,

w h a t

I n

early

t h e o r y

c a l c u l a t i o n s

a s s u m e

t h e

f u r t h e r

d u e

t h e

o f p r o b a b i l i t y . o f t e n

in

w h o

t h e o r y

c o u r s e ,

u s e

d e f i n e d

K o l m o g o r o v ,

c o m p a r a t i v e

i d e a s

1 9 7 4 ) .

l i m i t e d

t o

o f

A .

w a s

s e e m

t o

b e

t o

o n l y

i n c o h e r e n t

p r o p e r t i e s

w e

" G r u n d b e g r i f f e

d o d e r

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The

inference

W a h r s c h e i n l i c h k e i t s r e c h n u n g , " w h a t

p r o p e r t i e s

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as

a

t h e i r

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a t e d b a s e d

m a i n l y

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t o

of

Statistics.

p r o b a b i l i t y w h i l e

in

all o v e r

it

t h e i r

British

t h e o f

a n d

t h e

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a

t o

M a n y

o f

t h e a

W i t h

t h e s e

a n

b e t w e e n I n

m a n y B o r e l ,

p r o b a b i l i s t s ,

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o f

a n d

m a t h e m a t i c a l

r i g o r b y

in

m a t h e -

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t h e n ,

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e v e n t ,

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o f

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p r i m i -

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t h e

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variables.

b e y o n d

i n

s u b s e t s

b e

o f

far

o f

all

a n d

c e n t u r y

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o f

E

a n a l o g i e s

s e r i o u s

s t a n d a r d s

o f

f r o m

r a n d o m first

s u m

set

a r e

s c h o o l

as

r o o t s

t w o

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u n i f i c a t i o n

t h e i r

n o t

t h e

r e t i r e d

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a p p l y

h a s

d e f i n e

u s e d

o n e

w h o ,

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t h e

p r o b -

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o n

i n

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o r g a n i z a t i o n a l

i n

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-

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a n d

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w h i c h t h e

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d e p a r t m e n t s t h e o r y

o f t o

C h a r a c t e r i s t i c

w a s

c o n c e p t u a l

-

a n d

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h e

w a s

m a t h t h e o r y .

Mathematical

c o m p l e t e ,

u n i t s .

a n d

statistics

b o o k

in p r o b a b i l i t y

c o n c e p t ;

s m a l l e r

t r a d i t i o n

A .

F o u n d a t i o n s

i n t u i t i v e ,

1 9 3 0

w o r k

1 9 4 6

b e e n

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t h e

t h e

b e t w e e n

e x p e r i m e n t a l

n e v e r

a n

o f

science

in his

b y

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b u t

o f

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a n d

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citizen

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typically

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w a s

" O n

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t h e

t h e o r y

d i d

a

e m p i r i c a l

t h e

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p a p e r

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unify

h a v e

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r e a c h e d

w o r l d .

m a t h e m a t i c s ,

w a s

statisticians, w h o

f e r e n c e ,

t h e

field

t a k e n

o f

n i n e t e e n t h

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t o

t h e

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early

n o

p r o b a b i l i t y

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t h e o r y

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a p p r o a c h .

basis

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since

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s t r i k i n g

t h e

p r o b a b i l t y

f u n d a m e n t a l

i n t e r e s t e d

a r e

o b t a i n e d

t h e

sets

e x p e c t a t i o n ,

t h e

o f

t w o

1 9 8 2 ) . o f

his

w o r k

its

basic n o t i o n s .

i n d e p e n d e n c e

1 9 8 7 ) . Its i n f l u e n c e

1 9 3 0 s ,

c o n c e p t

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n o t

first

this w a s

a n d

n u m b e r s

s e t s "

as a f u n c t i o n

t h e r e

o n

o f

set,

t h e

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"field

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basic

m o r e

a set

t h e

M a r k o v ,

U n i o n :

t h e

in

T h e

i n t r o d u c e d

( G a n i ,

1 9 2 2 ,

a n d

l a r g e

h a d

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o f

t r a d i t i o n

it

o f

P r o b a b i l i t y

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sets in

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w h i c h

t h a t

a

o n e .

c e r t a i n

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m e a s u r e

H a u s d o r f f .

a

a x i o m a t i c a l l y

h a v e .

i n

u n i o n

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s y s t e m a t i z e

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discipline,

t e r m s

f u n c t i o n s

t h e i r

K o l m o g o r o v

a n d

w a s

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abilists

t h e

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set

a n d

o n e . A l l o t h e r

s h o w e d

i n t e g r a l

a n d

i n c l u d i n g

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o f

d o w n

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e a c h

z e r o

o f

v a r i a b l e

p r i o r

K o l m o g o r o v o f

t o

b e t w e e n

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assigns

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laid

p r o b a b i l i t y

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o f a r a n d o m

o r t h o g o n a l i t y

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real n u m b e r s ;

d e f i n i t i o n s ,

t h e

t h e

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n o t i o n

t w e e n

It

111

K o l m o g o r o v o f

n u m b e r

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e l e m e n t a r y

this

real

p r o b a b i l i t i e s .

E . T h e

c o n c e p t

s e t - f u n c t i o n .

" p r o b a b i l i t y , " e l e m e n t s

t h e

experts

Methods o n e

still

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m a t h e m a t i c s , statistical

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o f

t h e

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112

The

split,

in

1 9 7 3 ,

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since

statistical a s a m p l e

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t h e

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infinite

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d o e s

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m a d e

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t h e

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. . . , *•„).

m e t e r s

m a y t h e s e

F i s h e r

stated,

data,

u n k n o w n t o

that

find

data

p r o v i d e

a b o u t

that

c o n t a i n s

t h e

Fisher I n

called

a

abstract

the

s a m e

X

o b s e r v a t i o n

x

values

=

x

l i h o o d is

m o r e A

o f 0

2

,

a n d

likely

statistical

applicability.

it

that

f r o m

a n d

h e

t h e n t h e

is

t h e

data,

a n d as

its

t h e

w i t h

a

a s s u m e d d o e s

a n d

t h e

trials

h a d

o f is

o f

n o t

instance,

e v e n

certain

that

t h e

n o t

b e -

actually

that

is t o

o f

as

t h e u s e d

called

the

s a m p l e

T h e

g i v e

para-

i n f o r m a t i o n

o b t a i n

r e l e v a n t

data

o r

statistical

p a r a m e t e r

o f t e n

p o p u l a t i o n ,

c a n

suf-

F i s h e r

statistics.

o f

b e e n

a s a m p l e

t h e

p o p u -

t h e y

d r a w n .

task

full

c o m -

a n d

soil

called

t h e

p o p u -

f a r m i n g

characteristics

t h e

T h e

t h e

F o r

s a m p l e

o f

is

s a m p l e

s a m p l e

for

b e t w e e n

this c o n c e p t u a l

t h e

like s

a

r e p e t i t i o n s

a v e r a g e

statistical

variable X , p(x;

0),

w h e n

0

0

2

that

=

0

g i v e s

( D a w i d ,

a b o u t

t h e

model

i n f e r e n c e , statistics

i n f o r m a t i o n

values.

a b o u t

M

a p a r a m e t e r

0

it is o b s e r v e d

that, o n

m o d e l

F o r

a n d

o f

all p o s s i b l e

t h e

as p o s s i b l e

it is said t h a t

t h a n

o f

a parametric

S u p p o s e

than/>(x; 02); t h e n

( w h e r e

his

A

t h e

o f t h e

statistic

p o p u l a t i o n

statistic.

is i n f o r m a t i v e

0 o f 0 .

o f

is

in

p e r f o r m e d

as

It

i n f o r m a t i o n

f u n c t i o n

o b s e r v a t i o n

of

b e i n g

felt.

a n d

p o p u l a t i o n

sufficient t e r m s ,

p r o b a b i l i t y

u n k n o w n

as m u c h

set

t h e

tosses

toss

characteristics

letters

s u m m a r i e s

c a t i o n o f a n o b s e r v a b l e a

t h e

p a r a m e t e r s .

c o n t a i n

o f

c o i n

F i s h e r

w h i c h

d i s t i n c t i o n

a h y p o t h e t i c a l

o f

s a m p l e

characteristics

partially

t h e

p o p u l a t i o n

f r o m

R o m a n

T h e s e

b e

a b o u t

t h e

small

Annals

c o n c e p t

is d r a w n .

actually p e r f o r m e d

indiscriminately,

for

t h e

b e

t y p e

f o l l o w e d

p r e d e c e s s o r s ,

p o p u l a t i o n

a n d

is

abstract

a s u r v e y

it m a y

o r

as a r a n d o m

letters, like a,

parameters,

as in

s a m e

o u t ) ,

tosses

t h e

clarifications

s a m p l e

all p o s s i b l e

t h e

b e t w e e n

his

a mean

small G r e e k

(x}

T h e

t h e

e x p e r i m e n t

p r o c e d u r e

b y

w h i c h

o f

t h e

e m p h a s i z e d

o n e ,

set

w e a r

i n t o

c o n c e p t u a l

i n t r o d u c i n g

generally

that

c o n s i d e r e d

h e e d e d

talked

t h e

n o t

d i s t i n c t i o n

as

f r o m

agricultural

e x p e r i m e n t a l

p u r s u e d

Fisher

m o r e

in

Statistics, Theory.

e x i s t i n g

b u t

s a m e

t h e n

Mathematical

it

his p a p e r ,

is a s s u m e d

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actually

experts

Probability

p o p u l a t i o n

m u n i t y

c o i n

of

l o o k

I n

t h e

in

c o n s c i o u s l y

c a n

m o d e l .

m a y

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Fisher

p a p e r ,

lation

o f

inference

t h e

the

=

for

p r o b a b i l i t y

when/>(.*•; that X

a n d

1 9 8 3 ) .

l i k e l i h o o d

basis o f

0 ,

consists

x

Fisher's

9)

is n o t

a n d

o f

e a c h o f

t h e

o f 0, is l a r g e r that X

specifi-

v a l u e

o f

m a k i n g

idea

t h z t p ( x \

t h e o b s e r v a t i o n

a

is

t h a n — x

t h e

that

a n

for

all

s a m e 0 ^

0

is t h e

larger like-

alone,

0,

. is

instance,

a

v e r y t h e

abstract

a n d

flexible

n i n e t e e n t h - c e n t u r y

c o n c e p t

p r o b l e m

o f

o f

w i d e

m e a s u r e -

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The

m e n t

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m o d e l .

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m i n e

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c o m m u n i c a t i n g

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a s s u m i n g

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o n l y

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data

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test.

statistical t h e

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e s t i m a t e s

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o f

s i m p l e r

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t h e

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probability that

his

t a k e n

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t h e

t h e

his

t h e

X

. . .p(x20;

v a l u e s

M

t o

is

true

t h e o f t o

f r o m

n o r m a l w h i c h

a

the "cor-

p r o b a b i l i t y

p r o v i d e d

t h e

t o a

Grammar closely o f

d i s t r i b u t i o n s

c o n c e p t s ,

Pearson's, like

curve,

a n d

n o r m a l

o r

h e

d i d

n o t

s u m m a r i z e

t h e

t h e o r y

t o

Fisher's

e x p e r i m e n t .

fertilizer

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sufficient

w a s

c o n s t a n t s , "

of Science.

a

t o

e x -

biological

tied

t o

n o t

Fisher,

m e r e l y

causal p o w e r

t e n d e n c y

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b u t

w e r e

t h a n

t h e

" f r e q u e n c y

Pearson's

o f

t h e

n o r m a l

a v e r a g e

c o n t a i n s

called

t h e r e f o r e ,

in contrast,

I n

u.

o f

smaller

c u r v e s

p o w e r s ,

in line w i t h

i s \i.

X , .

their

o f t e n

causal

a b o u t

b e

p r o c e d u r e ,

a b o u t

t i m e

c u r v e s ,

t h e s e

w e r e

b i o m e t r i c i a n s ,

w e r e

fit

o f

t o

t h e

m e a s u r e m e n t s

a

n

g u a r a n t e e

w e

t h e n />(*;

statistics

d e t e r m i n i n g

w i t h

it

v a l u e

fi)

t o

t h r o u g h o u t

a c c o r d i n g

family

g e n e r a l l y

x

assign

m o v e

t o

m o r e

o n l y

a s s u m e d

s e n s e

p a r a m e t e r s

o f

will

is

is, g i v e n

s a m e

t o

s o u g h t

I n

g a v e

m o d e l s

u

It

statistical m o d e l s ,

T h e

UQ e q u a l

q u a n t i t i e s

H e

T h e

t h e

d e t e r m i n e s

m e a s u r e m e n t s ,

different

individual

is at

a

d e t e r -

c o n s t a n t

statistic, in

p r e c i s i o n

c o l l e a g u e s o f

b e

u s e d

i n f o r m a t i o n the

n o

c o n s i d e r e d

are

k n o w

o b s e r v e d

entities

p a r a m e t e r s

u n d e r

w e

causes, c o m p l e t e l y

p a r a m e t r i c

that

t h e

identify

w i t h o u t

H i s

case. data.

o b s e r v a t i o n s .

if

are

d e f i n e d

a special

"quaesita,"

a v e r a g e

m o d e l , t h e

e n d

T h e

u:

for

that

n u m b e r

actually

statistical

K a r l

t h e

o t h e r

x

d i s t r i b u t i o n

this

o f

his

are

for

T h a t

t o

that

t o

s a m e

u.

true

p r o d u c t / > ( * , ;

is a s u f f i c i e n t

t h e

m o r e

a s s u m i n g

p l u s

e s t i m a t e

is

a b o u t

g i v e

k n o w n ,

m e a s u r e m e n t s

p)

/ n

m e a s u r e m e n t s ,

justified,

in

is t h e

is

p a r a m e t e r t o

statistical

m e a s u r e d

w i t h

t w e n t y

s a f e g u a r d s

x,

t h e

t a k e n

take

a

p r o c e d u r e

e x p e r i e n c e

m e a s u r e m e n t s

2

i n f o r m a t i o n

t h e r e f o r e

o f

u. I f w e

b e

o f

t h e r e

a r o u n d

o f t e n

=

t o

t h e

t h e n

e x p e r i m e n t a l

t h e

o f

is

ideally,

o f

c

o f

p)

t e r m s

A s s u m i n g

u n k n o w n

and/>(x;

in

o b j e c t

o n l y

m e a n

)

113

t h e

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size

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c o n t a i n s

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. . , X

x .

g r o u p e d

t h e o r y

that/>(x \ x \

o f

, .

are

u)

1 a n d

t h e

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t h e r e

t h e o r y p(x;

( X ,

result

t h e

1), a n d

variance

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t h u s

(say

a n d

error

p e n d e n t , T h e

that

experts

c o n c e p t u a l i z e d

p r o c e d u r e

m e a s u r e m e n t s

e r r o r

b e

m e a s u r e m e n t

k n o w n

ditional

c a n

m e a s u r e m e n t s ,

t h e

m e a s u r e d . a

error

inference

o n e

o r

u s e d

d r u g in

m a y

statistics,

his

a r g u e w a s

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114

The

b o u g h t

b y

b u t i o n s

l i m i t i n g

(Stigler,

r e t u r n

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o r

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Still,

h i m s e l f

sufficient

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t h e

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b u t

o f

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t h e

o f

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t h e

e n d

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" l a w

o f

large

d e n t

trials. I n

n e c e s s a r y

M a r k o v d i t i o n s

describes state

a

o f

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studies,

o f

in

m u s t

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o f

h a v e

p o w e r f u l o f

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h e

s u c h

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p r o b a b i l i t y

analysis

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i n f e r e n c e ,

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F i s h e r ' s

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1 9 6 8 ) .

k i n d

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statistical

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-

it t h e

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sufficient 1 9 0 6

s y s t e m t h e

t h e

still

o f

in w h i c h o f

u n d e r l y i n g

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h e i g h t d i d

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series

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s t o c h a s t i c p h e n o m e n a ,

probability h o w e v e r ,

t h e o r y

t h e

a n

explicit

f o r

i n t e r e s t

b y

m a n y

-

is o n l y

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o f

p r o c e s s

at

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t h e

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this

so-called

for

i n d e p e n -

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e v e n

s c h o o l

called

transition t i m e

A .

u n d e r a

after-effects,

g i v e n

W h e n ,

n u m b e r s ,

is n o w

w i t h o u t

p r o b a b i l i t y

s y s t e m

b y

in

t h a t

h o l d s

1 9 0 6 ) . W h a t

o f

p r o b a b i l i t i e s .

i n v e s t i g a t i o n

t h e t h e

o f

f r e q u e n c i e s

c o n v e r g e n c e

a

o f

(see,

1.7),

is P o i s s o n ' s

( M a r k o v ,

t i m e

t h e o r y

m a t h e m a t i c a l

t h o u g h t

c o n d i t i o n s

state

in

(see

t o

t h e

w i t h

1 9 7 2 ) ,

t h e

i n d e p e n d e n t ,

associates

s t u d y

c e n t u r y

( L a n c a s t e r , like

t o

5.7).

a g e n e r a l

m o d e l

n o t

a c c o r d i n g

n i n e t e e n t h

m e a s u r e m e n t s

empirical

in

t e r m

t h a t

t h e

p r o b a b i l i s t i c

c e n t u r y ,

w a s

o f

t i m e

m e a s u r e m e n t s

n o w

t h e

is a

o v e r

a x i o m a t i z a t i o n

c o n v e r g e

a r o s e ,

m o d e l

o b v i o u s l y

t h e o r e m

n i n e t e e n t h

o n

o f

w h i c h

studies

p h y s i c s

d e p e n d e n c y

o n l y

t h e

m o d e l s

in

t h e

t h e o r e t i c a l

m a t h e m a t i c a l

d e p e n d s

fact

c h a n g e s

s u c c e s s i v e

K o l m o g o r o v ' s

a physical

t h a t

I n t e r e s t i n g l y ,

in

I n

b y

is

statistical

c o n -

c o n c e r n s

( B r a d l e y ,

special

n o r m a l l y

d e v i a t i o n s t o

a t h e

R e c e n t l y ,

l e d

m o d e l

t h a t

w e r e

S i m i l a r

tests

o f

statistical

o n e

n u m b e r s "

o f w e a k

o f

t h a t

trials

h a s

distri-

r e s p e c t

a s s u m e d

m i l d

1 9 8 1 ) .

t h e

p a r t

c h a r a c t e r

t h e

a n d

this

s y s t e m

B e r n o u l l i ' s

s h o w e d

is

k i n d

o u t g r o w t h

t h e

a p p r o a c h

w e r e

e v e n t s

u n d e r

o f

this

n o r m a l i t y . "

f u n c t i o n s

t o

in

o f t e n

statistical

e r r o r - t h e o r y

s t o c h a s t i c i t y t o

a r e

c o n c e p t s

s o n s

in

o f

a p p r o p r i a t e .

i n

w a s

o b s e r v a t i o n s ,

( H u b e r ,

o f

R u s s i a n

A c c o r d i n g

c h a i n

a n

c u l m i n a t e d

c u s s i o n

o f

T h e

p r o c e s s e s .

p r o c e s s e s is n o t

s o

a

h e i g h t

d y n a m i c

m e t h o d s

his

m o d e l

d e s c r i b e s

t h e

t h e

" m y t h

r e s t r i c t e d

w h i c h

c o r r e l a t i o n a l

a n d

o f

h e

families

1 9 5 1 ) .

i n d e p e n d e n c e

e v e n

n o t

i m p o r t a n t

laws.

since

p a r a m e t r i c

B a y e s i a n t h e

w o r k

d i s t r i b u t i o n - f r e e

s e e m

( H o t e l l i n g ,

p r o b a b i l i s t i c

a n d

b y

w h i c h

a s s u m e d

f o r

t h e

t h e

m e t h o d s

a

is

statistic,

particularly

p r o c e s s ,

o f

a n d

a n d

is b o r n e

i n f e r e n c e A

i d e a

r e s t r i c t e d

F i s h e r ' s

d i s t r i b u t i o n

so-called

c o n c e p t ,

s t u d i e d t h e

i n

t o

statistical

t h e s e

m o r e

f u n c t i o n

classical

o f

F i s h e r ' s

u n i f y i n g

t h e s e

ideas,

k n o w n

g o o d

experts

Ironically,

c o n t r i b u t i n g

" r o b u s t n e s s "

f u e l e d

o f

s o m e

t h u s

a b o u t

n o r m a l i t y t h e

1 9 7 6 ) .

t o

n i n e t e e n t h - c e n t u r y

o b s e r v a t i o n s ,

c e r n

h i m s e l f

inference

t o a n d

A . c o n -

M a r k o v w h i c h a n o t h e r n o t

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o n

The

t h e

p r e v i o u s

i m p o r t a n c e a

h i s t o r y o f

t h e

w h i c h

p r o c e s s e s H e r m a n o f

t h e

a n d

U d n y

scientific

w e r e

a n d

w i t h

t h e y

deliver,

in part, 1 8 6 9 ;

t r e n d s

t o

a n d

p h y s i c a l

a n d

see

m a k e

sciences

2.2),

e l u d e

r e g u l a r

s h a p e

o f

T H E

S T A T I S T I C A L

o n

A

T h e

discipline

n e t w o r k f o r m a l c l u d e t i o n s

o f

i n f o r m a l ,

i n t e r n a t i o n a l o f

T h e

N

o f inferential

specialized

a n d

t h a t

F i e n b e r g ,

1 9 8 5 ) .

It

a

1 8 8 5 w i t h

c o n t i n u a t i o n

w h i c h

w a s

Statistical

o f

t h e

o r g a n i z e d ,

( N e u m a n n - S p a l l a r t , m e t h o d s

o f

official

w o u l d

o f

statistical

Q u e t e l e t ,

u n d e r

t h a t

b r i n g

o f

b u r e a u s .

t h e

i n t o

t h e

b u t

o p e n

also

P e a r s o n

v a r i e t y

f r o m

t h e

o f

sociology,

social

sciences

"social

physics"

t o

e x p l a i n

social

1 9 6 7 ) .

l a w l i k e n e s s

a p p r o a c h e s ,

I n

o f

t h e s o m e

s u c h

as

t h e

1 9 8 5 ) .

I N S T I T U T I O N S

a

t o

a n d data. S o m e

is

c o m p l e x

t h e

c o h e r e n t

i n s t i t u t i o n s ,

w o r k i n g s .

o f

a n d

c o n g r e s s e s c o l l e c t i o n

careful

1 9 8 5

ISI

w h e n

T h e s e

a n d

in-

t h e

sec-

Q u e t e l e t , in

a i m e d

t o

scientific

l a w s

b y

a n d

f o u n d e d

i n t e n d e d t h e

t o

b e

first

o f

t h e

B r u s s e l s

C e n t r a l in

f o r m u l a t e

1 8 5 3

u n i f o r m

i n t e r n a t i o n a l

m o s t l y

m e m b e r s

c o m p a r a b l e

a n d

it w a s

p r o m o t e w e r e

Statistical

( A t k i n s o n

C o n g r e s s e s ,

t o

a n d

ISI w a s

h e l d

m e m b e r s

t h e

i n

t h e

Statistical

statistical

o f

b y a

I n t e r n a t i o n a l

jubilee

l e a d e r s h i p

o f

a n d

t h e

c o m p a r e

T h e i r

o n l y

o r g a n i z a t i o n s

its f o u n d a t i o n

t h e

n o t

w o r k .

c e n t e n a r y

A t

o f

b y

p r o f e s s i o n a l

B e l g i u m ,

a m a s s i n g

w o r k

a r c h i t e c t u r e ,

( B a r t h o l o m e w ,

its d e v e l o p m e n t

1885). T h e s e

statistical

t h e

p o s s i b l e

s h o w

o r g a n i z a t i o n its

classification

c o m p a r a b i l i t y

it

w i d e

( B a r n d o r f f - N i e l s e n ,

I n t e r n a t i o n a l

C o m m i s s i o n

e x p e c t e d

classical

statisticians

it is t o d a y .

a n d

I N F L U E N C E

is i n s t r u c t i v e

w h a t

a

p h y s i c s ,

P R O F E S S I O N :

D

i n t e r n a t i o n a l

K a r l

o c e a n o g r a p h y ,

statistics is c h a r a c t e r i z e d

w h e r e

c e l e b r a t e d

t o

m o r e

b e a c h

n a t i o n a l

w h i c h

in

w a y

f o r

1 9 8 6 ) . F o r

p r e d i c t i o n s

g u i d e

I n s t i t u t e ,

( G a n i ,

m a k i n g

k n o w l e d g e ,

a n d

u n i v e r s i t i e s c e n t r a l

b y

t h e

a

t o o l

c h e m i s t r y ,

Q u e t e l e t

a

p h e n o m e n a

r i p p l e s

s t o c h a s t i c

C r a m e r

o f

i n

statistician

m a t h e m a t i c a l

a p p r o a c h

t h e

raised

o f

H a r a l d

t h e

m e t e o r o l o g y ,

e c o l o g y ,

p r o v i d e

t h a t

t h e

t h e o r y

especially

m o d e l i n g

A d o l p h e

n a t u r a l

3 . 7

a

s h o r t - r a n g e

t h e y

f u r t h e r

a n d

a g e n e r a l

c o m b i n i n g

just a f e w

also

w e r e

a n d

1 9 5 9 ) .

a n i m a l

w h a t

d e p e n d e n c e

M a r k o v

o b s e r v a t i o n a l

n o w

t o m e n t i o n

( Q u e t e l e t ,

in

a b o u t

P e a r s o n

o f

S w e d e s ,

m o r e

a r e

K a r l

p o i n t

e c o n o m e t r i c s ,

p l a n t

Q u e s t i o n s

c e n t r a l

( B a r t l e t t ,

disciplines:

c o s m o l o g y ,

T h e

t h e

1 1 5

p r o b a b i l i s t

s t a r t i n g

a g a i n

p r o c e s s e s

e p i d e m i o l o g y ,

a

experts

a n d

t h e

1 9 8 1 ) .

Y u l e

S t o c h a s t i c

L e x i s

b e t w e e n

( O n d a r ,

R u s s i a n s

p r o c e s s .

o f

b e c a m e

W o l d ,

G .

t h e

w o r k

c o r r e s p o n d e n c e

C h u p r o v ,

o f

inference

d i r e c t o r s

o f

h o p e d ,

w i t h

statistical

d a t a

r e g u l a r i t i e s

f o r

a

f u t u r e

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The

116

"social physics." T h u s o f

statistical

congresses goal:

t o

t h e

s l o w l y

b e

b i n d i n g

data

a

nature.

T h e

o g o u s

t o

ISI

t h e

their

t o

i n t r o d u c e a n d

T h e

c o m p r e h e n s i v e styles O n e

a n d

d e b a t e

k n o w l e d g e t h e

a n d

a b o u t

t u n g t h e

d e r

o n

p o p u l a t i o n

o f

t h e

B u r e a u h e

o f

called

m e n t s

w a s

b e t t e r

if

care

b y

tive

m e t h o d "

w i t h a

t h e

p a p e r a n d

in

ISI,

n o t , for

t h e

t h e

g a t h e r i n g

h o w e v e r , a

s a m p l e

in o r

a

its in

that

o f

still

K i a e r ,

u s e

a g r e e d

battled

against

g e n e r a l

p r o -

local

u s i n g

s a m p l e s in

relied

o f

O n e

m o r e

Kiaer's

C e n t r a l o r

w h a t a r g u -

b e

m u c h

since

m o r e

"representa-

s a m p l i n g ;

t o

o n e

his

o f t e n

i m p o r t a n t

o f

w e r e

f r o m

o f

Kiaer's

(Jensen,

g e t

B e o b a c h -

t h e

i n v e s t i g a t e d ,

o f

t o

Bulgaria.

s a m p l e s ,

w o u l d

h a d

in

i n v e s t i g a t i o n

s a m p l i n g

i d e a

clash

a

traditions.

a statistician

1898).

in

for

i n v e s t i g a t i o n s "

r a n d o m

R a n d o m c e n t u r y

t o

t h e

data h a d

e x e r t e d .

o f

this

t h e

for

b e e n b e

see

d i r e c t o r

characteristics

census.

in g e t t i n g

it

w a s

a

characteristics

b e

l e a r n e d

w a s

o n l y

1 9 2 6 ) .

v e r s i o n

r a n d o m n e s s

f r o m u n d e r -

A n

early

o f

s a m p l i n g

in

s a m p l i n g

1 9 3 4 ) .

p e r i o d , a i m its

c o u l d

w e

c o m p l e t e

a s a m p l e

h a d

basis

material

" e r s c h o p f e n d e

(Kiaer, in

m a k e

at large. T h e s e

( N e y m a n ,

either

i n t e r v i e w e r s

N e y m a n

i n t e r w a r

data

anal-

t h e

a n d

c o m m u n i t y

again

p r e s s e d

p o p u l a t i o n

b e g i n n i n g

i m p o r t a n t

t h e

indi-

c o n g r e s s e s :

data

u s i n g

"Partial

A n d e r s

w h o

o f

t h e

It w a s

in

scientific

o n

as t h e

s o u r c e

c o l l e c t e d

1 8 9 5 ) .

o r

o f

as

association

different

is, o n

m e t h o d "

o f

i n v e s t i g a t i o n ,

b y J e r z y

w a s

N o r w a y ,

w h o l e

p o p u l a t i o n

a c c e p t e d I n

d i d

M a y r ,

c o u n t r i e s ,

quality

trained

search

c o m p l e t e

s t o o d

t h e t h e

b e t t e r

s y s t e m a t i c

(

that

p o w e r

t u r m o i l ,

s e l e c t e d

its p a g e s

f a r m i n g

called

d o u b l e

science.

possibility

M a y r

free

g o a l

t h e

for p r i v a t e

statistical

m a n y

as t h e

M a s s e , "

r e p r e s e n t a t i v e

that

t h a n

o f

o f

o n

f r o m

s u c h

v o n

s a m e

their

m o r a l

i n t e r e s t i n g

since

v e r y

a

w e r e

statistical

unscientific.

E u r o p e a n

" t h e

t h e

s t u d y a n d

t h e

statisticians w h o

sozialen

u n d e r

m e m b e r s

p r o v i d e

statisticians

G e o r g

Statistics

o f

o f

m e t h o d s

t h e

political

as a p u r e l y

w i t h

statistics,

century,

i m p r e c i s e

smaller

o f

ISI

a p o p u l a t i o n ,

p r i m a r e n

c o n s i d e r e d

t h e

t o

o f

w i t h

a n o p p o r t u n i t y

c o m p i l a t i o n

k n o w l e d g e

o f

w h a t

b u t

t h e

c o n c e r n e d

n i n e t e e n t h

m o r e

w h e r e

France^

h i s t o r y

interest

s u c h

de

o f

t h e m

t o

H o w e v e r ,

a v i c t i m

officials

a r g u m e n t s

p r o p o s e d

in

b e c a m e

t o p r o v i d e a n d

a t t e n t i o n

r e p r e s e n t a t i o n .

e x p o s e d

qualifications,

p r o c e e d i n g s

data

t h e r e f o r e

t h e

also g i v e n

g o v e r n m e n t

also

ideas

u n i f o r m i t y

foster

for

w a r ) , a n d

Institut

h a d

initial zeal a n d

( w h i c h

w a s

p e r s o n a l

a n d

place

e x c h a n g e

o f

m o t e

their

m e e t i n g

F r a n c o - P r u s s i a n t o

I n

lost

experts

c o n g r e s s e s

analysis

r e s o l u t i o n s

viduals

t h e

inference

t o

o r g a n i z a t i o n s collect

scientific

a p p e a r e d

statistics

goals.

a n d

A m o n g

that

c o m p e t e d

w i t h

set

s t a n d a r d s

for

t o t h e m

w e r e

t h e

t h e data

L e a g u e

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o f

The

N a t i o n s , t u t e

t h e

o f

I n t e r n a t i o n a l

A g r i c u l t u r e ,

U n i o n

for

t h e

1 9 3 4 ) .

B u t

it

t h e

h i s t o r y

t h e

o f

o r g a n i z a t i o n ,

t h e

t o o k

t h e

n a r r o w l y a n d tical

a n d

1 9 4 7 ) .

Its

c a m e

the

a n d

all

tributors

t o

h o l d

t h e

w h o s e

a d v a n c e d

s t u d e n t s ,

in

o f

Francis

m e t h o d s

o f

ideal

o f

e m a t i c a l

W a r s a w

a n d

g r o u p

K a r l a n d

o f

a

in

o f

t o s t u d y w i t h

a n d

p u b l i s h e d

o f

a n d

a

in t h e

that

w o u l d t o

w h i c h

topics.

T h i s

t h e m

W .

a n d

w a s

a

c o u l d

P e a r s o n , o n l y o n e

all

o f

t h e s e

b e g a n

m a i n l y

p r o b l e m s . f o u n d e d

t h e

in

t o

N e y m a n

1 9 0 1

o n in

t h e t e r m s

intellectual

b o d y t o

b y

statistical

b a s e d

n e w

a p p l i e d

w h e n

m e t h o d s

W e l d o n

a

in

i m p o r t a n t

u n d e r s t a n d i n g

o f

in

t o o k

f e w

journal

t h e

t h e

G a l t o n

n e w

b i o l o g y

b e

o f

t o

s p r e a d

s l o w l y

1 9 2 5 ,

A

t o

influential

b e c a m e

F. R.

t o

first

l a b o r a t o r y I n

1 9 8 6 ) .

c o n t r i b u t e d

t h e m t h e

c o n thirty-

successors

field.

training,

active

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statistical

o w n

p r o m o t e

w h i c h

a

b e -

statistics,

l a b o r a t o r y

learn

institutionalized

p o s t g r a d u a t e s . K a r l

k i n d

t h u s

1 9 8 5 ) ,

Francis

z o o l o g i s t

statistics

T h e

are

(Rice,

f o r t y - o n e

b y

Biometrika,

statis-

Its

e n d o w e d

m o r p h o l o g i c a l

l a b o r a t o r y

t h e

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o f

o f

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t h e s e

b y

v o l u n t a r y

p r o f e s s i o n a l

o f

their

m o r e

r e p r e s e n t e d

a p p r o v e d

a p p l y i n g

statistical

their

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t o

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a

earliest

statistics. M o s t

f o r m u l a t i o n s o f

c h e m i s t

-

t h e

w a s

activities.

t h e m

i n d u s t r y o f

ISI

in

I 9 6 0 ) .

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a c o m m u n i t y o n

in

( N i x o n ,

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b r e a k

m a t h e m a t i c a l

a n d

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c h a n g e s

m e t h o d o l o g y .

k n o w

T h e

s h a r p

T h e

t h e y

Statistical

p r o b l e m s

o p p o s e d

P e a r s o n ' s

d o m a i n

i n t e r n a t i o n a l

as

statistics,

t o o l s

u n l i m i t e d

data

a n d

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a c a d e m y "

r e c e n t l y

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ISI.

p r o f e s s o r s .

n o w

t e c h n i q u e s

p e r s p e c t i v e

types.

w e

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w a s

K a r l

variation,

s t r u c t u r e

S.

w o r k

biological a n d

o f

W .

e x i s t i n g

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t h e o r y

( A t k i n s o n

as

t h e

t h e

e x c l u s i v e l y

ISI

a

t h e

s e m i - g o v e r n m e n t a l

science

t o

o f

o f

p r o f e s s i o n a l i z e d

w a s

m a t h e m a t i c s

their

collect

s t u d y

as

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m a s t e r i n g

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t o

a p p l i e d

s u c h

p i o n e e r s b y

b e

c o n t e x t

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P r o b l e m s

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o r g a n i z a t i o n

T h e

t h e

m a r k e d

o r g a n i z a t i o n ;

laboratory."

f r o m

that

statistical

(International

G a l t o n

a n d

P o p u l a t i o n

t h e

t h e

university

d i r e c t o r

s t u d e n t s

c o u l d

w i t h

statistics

t h e

first

o f

p o s i t i o n s .

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w a s

o r

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"statistical

laboratories

that

a g e n c y

m o s t l y

o f

o f

j u d g e d

t o w a r d s

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D e p a r t m e n t s

b e

I n t e r n a t i o n a l

f u n d a m e n t a l

f u n c t i o n s

c o u n t r y

shifted

n o w

in

official

t o

w h a t

university

so-called

a n

association

P r o f e s s i o n a l

1 9 0 4 ,

t h a n

international

are

o f

o n

t o

"international

w e r e

activity

m e m b e r s

t h r e e

w h o

n o t

s h e d

a g e n c i e s

a n

rather

e x p e r t s

m e r i t ,

as

o f

a i m s

t h e

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led

a n d

a d m i n i s t r a t i v e

d e f i n e d

scientific

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a n d

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i n t e r n a t i o n a l

O r g a n i z a t i o n ,

I n v e s t i g a t i o n

ISI,

111

experts

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S e c o n d

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L a b o r

t h e

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w a s

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a n

118

The

E n g l i s h m a n . J a p a n e s e . India, t h e

T h e

T h e

a n d

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l a b o r a t o r y

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o n

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W o r l d

y e a r

1 9 2 9 - 3 0

G a l t o n

a n d

f r o m

cine,

a n d

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t h e

w a s

a

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K a r l

o f

a g r i c u l t u r e ,

o f

o f

w a y

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it

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at

m o r e

t h a n

social

t h e

s c i e n c e

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in

i n c o r p o r a t e

p e o p l e

U S A

d u r i n g

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t h e

w a s

( h a v i n g

t h e

w o r l d ,

b i o l o g y ,

w i t h

t h e

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all o v e r

w o r k

g r e a t

a c a d e m i c

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c h e m i s t r y ,

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in

f r o m

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e x e r t e d

t h e

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1 9 3 4 - 4 4 ,

disciplines

t o

w h o

f a r m

p e r i o d

fifty

e x p e r i m e n t a l

a n d

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o f

Statistics.

t a u g h t

o n

e x c e p t i o n

m a n a g e d

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w a s

t h e

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h a d

t h e n

t h e

w i t h

f r o m

A p p l i e d

v o l u n t e e r

E u g e n i c s

U . S . ,

P e a r s o n

H a r o l d

1 9 4 0 ) .

P e a r s o n )

a v a r i e t y

t i m e

role.

t h e

s t u d e n t s

R o t h a m s t e d ,

fertilizing

P r o f e s s o r

s u c c e e d e d

t h a t

experts

f r o m

D e p a r t m e n t

in

statistics

all

b r o u g h t

B y

a

F i s h e r ' s p r e s e n c e p l a y e d

w e r e

y e a r

Y u g o s l a v i a .

inference

h i m

m e d i -

( Y o u d e n ,

1 9 5 1 ) . T h e

i n f l u e n c e

Workers, in

w a s

t h e

t u r a l a n d

w a s

m a n y

t h e

t h e

t h e

o f

at

at

A n n

P e r h a p s statistics

in

later

t h e

a n d

a

m o s t

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rest

t h e

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in

f o r

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at

a n d

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h a d

w i t h

a

n e a r l y

e d i t i o n s

2 0 , 0 0 0

c o p i e s

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a p p l i c a t i o n s

in

a n d

a g r i c u l -

q u a l i t y

t h e

w i d e

c e n t e r s

a n d

n e w

1 9 3 6 .

c o n t r o l ,

N e w

U n i t e d

S n e d e c o r

a n d

o n

t h e

at

v a r i e t y

o f

h u s b a n d r y

o f

w e r e

M i c h i g a n

d e v e l o p m e n t i n

1 9 3 8 ,

B e r k e l e y ,

D e p a r t m e n t

L o n d o n .

i n

F i s h e r ' s

statistics

U n i v e r s i t y

Statistics, N e y m a n

it i n

F i s h e r

himself,

a n i m a l in

States.

f o r

m a d e

a c c e p t a n c e ,

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t h e

a r r a n g e d

C o l l e g e ,

Y o r k .

E u r o p e

N e y m a n ' s

E u r o p e

S t a t e

Methods,

t h e

f r o m

I o w a

e n t h u s i a s m

Hill, in

f r o m

o f

i n

a g r o n o m y

C h a p e l

o f

o f

Statistical

in

w i t h i n

s e e n

o f i n f o r m a t i o n

L a b o r a t o r y ,

b o o k

w a s

D e p a r t m e n t

as h e

t h e 1 9 3 1

i n f l u e n c e

life.

Research

e l e v e n

S p a n i s h ,

f o u n d

flow

U n i v e r s i t y

S t a t e s

w i t h

L a b o r a t o r y

w o r k e r s

U n i v e r s i t y

his

fruitfully

biologists,

o f

c e n t e r s

d i r e c t

in a s e p a r a t e

c o l l a b o r a t e d

sessions

o f

for

t h r o u g h

e x p e r i m e n t a t i o n ,

statistical

D i r e c t o r

h o s t

U n i t e d at

w e n t

Italian,

t h e

Statistics

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statistical l a b o r a t o r y

o m e r s ,

t h e

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p o s i t i o n

r e m a i n e d a n d

t h e

t h e

Methods

fields.

f o r

a c a d e m i c

o f N o r t h

A r b o r ,

F r e n c h ,

his w e l l - k n o w n

t o

1 9 5 1 ) .

U n i v e r s i t y

faculty

in

It

e x i s t e n c e ,

scientific

s u m m e r

available

( Y o u d e n , t h e

a n d

its

i n d u s t r i a l

c h a n n e l s

g r e a t

t w o

o f

Statistical

analysis o f v a r i a n c e

w a s

S n e d e c o r ,

t e a c h i n g

m e t h o d s

S t a t e s

b o o k , 1 9 5 1 ) .

i n t o

assays,

b r o a d e s t

t h e

W .

l e c t u r e

his

t h a t p e r i o d ,

U n i t e d

G e o r g e

y e a r s

t r a n s l a t e d

b i o l o g i c a l

first

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e x p e r i m e n t a l

o f

first

t o

I n

trials,

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t w e n t y - f i v e

a n d

J a p a n e s e .

F i s h e r ' s

t r e m e n d o u s

first

sold,

o f

F r o m

scientists,

o f

w h e r e

a h e

M a t h e m a t i c s ,

c o p i e d

this

o f

o f

P e a r s o n ' s

base,

i n c l u d i n g

N e y m a n a s t r o n -

m e t e o r o l o g i s t s .

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The

inference

Statistics

N e y m a n ' s

arrival

p h i l o s o p h y

o f

explicitness

in

c o n t r a s t

"find

t o

w o r k e r s , " m o o d " T h e t o

as

o f

in

t h e

o n l y u s e f u l

m e n t

in

m i t t e e

1 9 4 2

o f

t h e

c o u l d

also

quality

a n d

I n

it

fact

able

stitutions.

B o t h

t h e

sciences,

a u t o n o m y

t h e

w e r e 1 9 8 5 ) .

d o c t r i n e

o f

It

s e q u e n t i a l

statistical d e c i s i o n lished

after

f u n c t i o n s cision I n

t h e o r y t h e

m a j o r

o f

a n

in

t h e

a n d

t h e

Virginia.

H e

at

e x p e r t a r g u e d

t h e

e x p e r i m e n t

w a s

o b v i o u s l y

W a l l i s

a n d

at

t h e

t h e

that o n e

n e e d

twist

n o t

s u p e r i o r

o r

e c o n o m i s t

b e

in

( S a v a g e , t h e

( u n d e r

A .

N a v a l

c o u l d

o b v i o u s l y

et

b u t

areas

al.,

1 9 4 0 ) .

W a r

that

social

ina n d

d e p a r t m e n t a l

o f

A b r a h a m

t h e

in

t h e

t h e o r y

W a l d

a n d

statistical o r

a n d

N e y m a n ' s

p r u d e n t

in

as

selection,

a n d

lines

personalistic

u n d e r at

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o f

p u b -

d e c i s i o n

B a y e s i a n

at

t h e

d e -

either

F r i e d m a n

a n d

s o

b e c a u s e

T h i s

o f

idea

several o f

( u n d e r

analysis a

N a v y in

m a n y t h e w a s

t r a n s f o r m e d

t h e

Statistical

P r i n c e t o n

G r o u n d

first

o n e

( t h e

S e q u e n t i a l

P r o v i n g

w e r e

o f

C o l u m b i a

a s u g g e s t i o n

inferior.

t h e r e

c o n t r a c t

W a l l i s ) ,

see after

c o m p l e t e d ,

M i l t o n

m o r e

N e y m a n ) .

t h r o u g h

U . S .

statis-

1 9 8 5 ; B a r n a r d

m a d e

W o r l d

n o t a b l y W .

s u c h

its

t h e

o f

less

e n g i n e e r i n g

a n d

t h e o r y

t h e

in

b y

t h e

n u m b e r s ,

disciplines -

C o m -

that

W o r l d

m a t h e m a t i c a l

S e c o n d

u n d e r

i n d e x

S e c o n d

b y

D e p a r t -

o f

stressed

-

t h e

1 9 5 4 ) .

w o r k i n g

C o l u m b i a at

o f f s p r i n g

a l o n g

w a s

W a r

P r e p a r e d n e s s

( F i e n b e r g ,

1 9 5 0 ) . T h e

forces,

B e r k e l e y

e f f o r t

t h e

( E i s e n h a r t

military

d e v e l o p e d

1 9 4 7 ,

S.R.G.,

t h e

w e l l

p e r s o n n e l

statistics

m o r e

b o t h

S a v a g e

o f

P r o g r a m

t h e

fit

t h u s

a n d

o t h e r

o f

w h i c h

a n d

a subjective

o r

m a n y

w a r

b e h a v i o r ,

a r m e d

s o

in

d e v e l o p m e n t s

statisticians

S . R . G .

o r d n a n c e

n e w

States d u r i n g

o f

D e f e n s e

research

p r e d i c t i o n s , a n d

h a d

a v e r a g e s

f e l l o w

(in

war.

W a r

f o r e c a s t i n g

a n d

t h e

analysis

L . J .

G r o u p ,

W i l k s ) ,

n a t e d

o f

g r o u p s

R e s e a r c h

t o

t h e

b e h a v i o r "

a p p r o a c h i n g

D e m i n g

A s s o c i a t i o n ,

r e c e p t i o n

b y

( W a l d ,

g i v e n

t h e

Statistics, a n

activities

i n d u s t r y

f u n c t i o n s ,

w a r

U n i t e d

b r a n c h e s

S.

t h e

w a s

their

E.

earlier

w e a t h e r

p o s i t i v e

i n d u c t i v e

b y

t o

H i s

particular

Fisher),

e x p e r i m e n t a t i o n ,

t o i n f l u e n c e

l e d

b y

t i m e d .

w i t h

" i n d u c t i v e

d i c t a t e d

W .

N a t i o n a l

surveys, a n d

b y

1 9 3 8 ,

u n d e r s t o o d

calculating

t h e

f u r t h e r e d

Plackett,

o f

in

t h r o u g h

statisticians w e r e

social

t o

s a m p l e

w a s

A n d

Statistical

just g o o d

b o m b i n g ,

w a s

w e l l

f o r w a r d

c o m m u n i c a t e

M a t h e m a t i c a l

A m e r i c a n

c o n t r o l ,

g u n n e r y

t h e o r y

o f

c o n t r i b u t e

t o

w r o t e

1 9 8 0 ) .

Institute

n o t

data

in

c h a n c e ,

o f a statistician is t o m a k e

action,"

(Wallis,

m a t h e m a t i c a l ticians w e r e

for

b y

b r o u g h t

r e q u i r e m e n t s

f u n c t i o n

basis

o f

119

w a r

w a s ,

c o i n e d

i n f e r e n c e t h e

t o

States

h e

r e d u c t i o n s

a n d

g o e s

inference,

e x p r e s s i o n

t i m e

a

U n i t e d

statistical

statistical

t h e

p r o v i d e

t h e

experts

S.

origiofficer,

D a h l g r e n , r o u n d s

n e w

m e t h o d

p i c k e d b y

that

u p

b y

A b r a h a m

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120

The

W a l d t h e

i n t o

a

t h e o r y

w o r k e d

o f

for

R e s e a r c h , t o

f u l l - b l o o d e d

flee

s h o r t

w h e r e

A u s t r i a

r e f u g e

in

t h e

F o u n d a t i o n . P e a r s o n (reject

o r

m o r e

after

in t h e

tests

o f

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t u r n s

t h e

statistical

d e c i s i o n

p r o b l e m s

in

f o r m a l

a

M o r g e n s t e r n , w o u l d

incur

It is clear tical t h e

W a l d

w h e n that

research. w a r

e f f o r t

sources,

s u c h

research d u r i n g

large

o f t h e

g o t

as t h e

s t r e n g t h e n e d

d e c i s i o n

a n d

their O u r

m e c h a n i z e d

1 9 4 0 ,

p s y c h o l o g i s t s

zsscss

their

M u r r a y , ( 1 9 4 9 , S e c o n d

t h e

g u i d e

this

u s e d

is

1 9 8 7 ) . 1 9 5 0 )

T h r o u g h

o n

W o r l d

t h e W a r ,

t h e

social

o n

n e e d s

o f e d u c a t i o n a l

t h e m

in

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o f

p s y c h o l o g y

t h e

t o

s u c h o f

a d m i n i s t r a t o r s

bureaucratic

s a m e

a n d

t h e

O s k a r o n e

first

k i n d .

o f

statis-

that

financing

fit

i n t o

f u n d i n g t h e

t h e y

h a d

is

its

that

military

d e c i s i o n s

basic f u n d e d

that

c a n

w i t h

in

b e

it

also

o f

as

that

w a s

c u r r i c u l u m

et

d u r i n g

a c c e p t / r e j e c t

t o a n d

S t o u f f e r

"objective"

o n

m e t h o d s

soldiers

a t r e n d

o n

B e f o r e

( G i g e r e n z e r

studies

t h e

m a d e

p s y c h o l o g y .

results

a n d

m e a s u r e m e n t s .

u n s t a n d a r d i z e d

for a n

decisions

a n d

statistical p r o b l e m s ,

w a r

p s y c h o l o g i s t s ,

g a m e s

projects

A m e r i c a n

t e c h n i q u e s

o f

o f

d e c i s i o n

t h e specifics

c o m b i n e d

a n d

t h e o r y

losses

h o w e v e r ,

o b s e r v a t i o n a l o f

t h e

in

p o w e r f u l

as

N e u m a n n

statistics

i n f o r m a l

i m p a c t

statistical

their h o l d

their

a n d

role

m o r e

o f

m a k e

fixed

W a l d ' s

e r r o r

t o

n o t

p r o b l e m s

w h o m

here,

r e a s o n i n g

t h e

largely

e x p e r i m e n t a l

s t r e n g t h e n e d b y

o f

that

t o

k e p t

s t u d e n t s

r e a s o n a b l e

f o r m a l ,

e x a m p l e

R e s e a r c h ,

idea

t h e

is

t h e o r y

t h e

a p p r o a c h

t h e

p r i m e

w a r

C a r n e g i e

d e c i d i n g

size

research

c l a i m

o f

lead

as a n

t h e o r e t i c

t o

A

t h e

t h e

f o u n d

d e c i s i o n s

i n f l u e n c e d

a p p l i e d

N a v y

p e o p l e

o f

o f

o f

a c c u s t o m e d basis

W a r

a n d

able

t w o

a c c o u n t

d e c i s i o n

A f t e r

1 9 6 1 ) .

v o n

o f

b e e n

b e t w e e n

statistical

i n t o

1938,

sense.

J o h n

take

W o r l d

O f f i c e

( O l d ,

t h e

t o

n u m b e r

scientists

w a r

b y

h a d

C y c l e

N e y m a n -

c a n

t h e

h a d

o f

s a m p l e

U s i n g

w h o

s e q u e n c e s

o p t i o n

t e s t i n g

nature."

f u n d e d .

t h e

t h e

i n t e r p r e t s

a w r o n g

S e c o n d

t h e

N e y m a n - P e a r s o n

able

m a k i n g

has

H e

in

t h e o r y ,

B u s i n e s s

s u p p o r t

c h o o s i n g

that

d e v e l o p e d

w a s

t h e

A

t h e

against

t h e o r y

also

director.

o f

J e w

for

G e r m a n y

t h e o r y

s e q u e n t i a l

f u n c t i o n s

" g a m e

utility

in

t h e n

t h e o f

R o m a n i a n

Institute

financial

instead

m e a n s

that

size,

w a s

a

t h e

is

statistician

o u t

s a m e

w i t h

N e y m a n - P e a r s o n

w a s

w i t h

analysis

T h i s

t h e

A u s t r i a n

Anschluss

w h i c h ,

o b s e r v a t i o n s .

a d v a n c e .

t h e

States

o f

W a l d

M o r g e n s t e r n

S e q u e n t i a l

accept),

at

t h e

U n i t e d

d e c i s i o n s

analysis.

t i m e

O s k a r

experts

m o d i f i c a t i o n

s e q u e n t i a l

a

inference

al. t h e

variety

r e i n f o r c e d

t e c h n i q u e

t o

i n n o v a t i o n

1 9 8 7 a ) .

3 . 8

T h e

agricultural

l e m

c o n c e r n i n g

C O N C L U S I O N

c h e m i s t J o h n s t o n e x p e r i m e n t a l

f o u n d

d e s i g n

h i m s e l f c o n f r o n t e d a n d

t h e

i n f e r e n c e

w i t h f r o m

a

p r o b o b s e r -

Downloaded from https://www.cambridge.org/core. Newcastle University, on 09 May 2018 at 22:47:10, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.005

The

v a t i o n a l

data

trying

t o

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-

in o f

t h e

p l i n e o f

I n

t o

d o u b t f u l

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Statistical

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Society,

t h e

w h e n

p e r i o d t h e

t h e

p e r h a p s , n u m b e r deliver b e

a c a d e m i c equally

m o r e

p r o b l e m s

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c o m e

t h e s e s u c h

t h e t o

b e

tools. W e as

t h e

m e a n i n g

o f

c h o l o g y ,

w h i c h

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c h a p t e r T h e

a

o f

discih i s t o r y

c o n c e p t u a l

far

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b e i n g

c o m p e t e ,

a n d

scientists

(see

a c h i e v e -

h a v e

s h a p e d

a w a i t i n g

t h e r e

t o

in

this

t h e is

ideal

o f

b y

t h e

t h e m , n e w

m o s t

d e d i c a t e d

really,

o f t e n

a n d

that

e x i s t i n g

that

a c c o m -

instances

science

W e

t h e

equally

t o s e a r c h i n g

in a p o p u l a t i o n .

t o

h a v e

a n d

e x e m p l i f i e d a

o r

historian

e x p e r i m e n t

f r o m

a n d

s u d d e n l y

c o u l d ,

s t r i k i n g

d e a r l y

statistics

are

l o n g e r

e n d

c o n c e p t s

s o m e

a scientific

t o a discipline a v e r a g e

o f

n o

t h e

A .

accurate,

w h i c h

a n d

R.

m i n d s ,

a n d

w a s

applications

c h a p t e r

p e r h a p s

m e n ' s

t h e r e

R o y a l

m u c h

that, q u i t e

m e t h o d s

a d d r e s s

t h e

chapter,

for

s h a r p

p h i l o s o p h e r that

this

p r e p a r i n g s o

t o

o f

i n in

t h e p s y -

a s k i n g for

will r e t u r n

for

causal t o

this

i n f e r e n c e

are

6.

c h a n g e s

u b i q u i t o u s

entire

interests,

at w o r k

realistic,

s e e n

t h e

b e e n

sufficiently

h a v e

o n

this

institutional

t o

t h e y w o r k ,

t e r m s

l a w s

o f

a d d r e s s

sufficiently

are

T h i s

discipline

u n i f i e d is

in

i n v e s t i g a t i n g

social

a n d

b e c o m e

t r a n s f o r m e d

g e n e r a l p s y c h o l o g i c a l factors

w h i c h

in

causality.

o f

political

causes h a v e

r e c o g n i z e

in

dif-

t o

statistics

e p i g r a p h

r e d e f i n e d

c h a n g e

in a q u i t e p r o b l e m s

t h e

a n d

presidential

1 9 5 3 ) . T h e

t o o l s

late

e n -

p i e c e s

single

plants.

natural

abstract

a n d

practice

a n d

t h e

i m p a t i e n t l y

a n d

a

efflorescence,

h a d

(Fisher,

n e w

c o n c e p t u a l

1 9 5 3

t h r o u g h

fastidious,

b e c a u s e

his

i m p o r t a n t ,

o f

a c c o m p a n i e d

c a m e

t h e

p r o v i d e d

t o o l s

t h e g o o d s "

in

s t u d i e d

investi-

o f

their

typical

Bits

u n d e r

b y

e x p e r t s .

m a n i f e s t

institutions

t h e

i n t o

n e e d s

" h i d d e n

o f applications

c r e a t e d

p a n y

o f

is

inferential

i m p r e s s i v e

w h i c h

o f

o f

b e

in

a c c u s t o m e d

b y

h a v e

d o c t r i n e

i n f e r e n c e

that

n o w

statistics.

d o m i n a t e

t o n e

e x a m p l e

p u r s u e d

c h e m i s t r y

o b j e c t s t o

n o t

m a t t e r

a n d

c o m e

are

t h e y

e c o n o m i c

o f

s p e c u l a t e d

s h a p i n g

t o

w i t h

u p b e a t

h a v e

w e r e

subject

natural

c o m b i n a t i o n

6 ) . N e v e r t h e l e s s ,

p r o b l e m s

t h e

d e f i n e d

s c h o o l s

c o m p r o m i s e s

t h e

F i s h e r

this

A l t e r n a t i v e

p r o f e s s i o n

I n

there;

m e t h o d o l o g i c a l

t o g e t h e r

b y

scientists

research

121

p h y s i o l o g y

agricultural

a n d

Y e t

a n d

c o m p l e t e d .

o f

t h e

m a t h e m a t i c a l

h e r e

probability.

g o v e r n

this o n e

that

a c a n o n

e m e r g e d

c h a p t e r

like

experts

T h e s e

displayed

this

i n f e r e n c e ,

s t r u c t u r e

a

fact,

that

case,

variation

disciplines

a c c o r d i n g scientific

l a w s

q u e s t i o n s

w a y . o f

t h e

h y p o t h e s e s .

J o h n s t o n ' s

v i r o n m e n t ,

variety

causal

analyze

B e c a u s e

f e r e n t

t o

inference

a n d

b r o u g h t

b y

p r o f o u n d .

publicly d e m o n s t r a t e d , m e n t

that

t h e

e v e n t s

w e r e

n o t

r e q u i r e d

a n d

t h e

I n

early

it w a s

r e p o r t e d t o

b e

n e w

able

m e t h o d s

m o d e r n

c u s t o m a r y

h a d t o

o f

statistical

science,

k n o w l e d g e

t o h a v e w i t n e s s e s sign a

actually h a p p e n e d . replicate

h a d

t h e

B u t

t h e s e

t o

b e

d o c u -

w i t n e s s e s

d e m o n s t r a t i o n s ,

w h o s e

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122

The

p r o p e r

e x e c u t i o n

bureaucratic t o

reach

I n

a n d

Scientists,

data

g r o u p .

B u t

b e

social

m e n t a l

setups.

cial

their

this

b o o k ,

a n d

o u r

w i t h

t h e s e

o f probability.

g r e s s

o f

ideas

m e n t

o f

m e t h o d s

fields

h a v e

a b o u t

has b e e n g i v e n is

treated

in

in

d e e p

A n d

m e t h o d s

m o s t

as

o f

b e

w e

j u d g m e n t

facts

in

w i t h

e y e -

o f

their

c h a p t e r

t h e m

b y

a

a

figures.

m e c h a n i z e d

s a n c t i o n e d

o f

a n d

m e m b e r s

a r g u e

a n d

k n o w l e d g e

satisfied

t h e

m o d e r n

ideologically

m a n i p u l a t i n g

t r a n s f o r m a t i o n w i t h

yet,

it

that

studies.

especially

o f o f

w a s

all o u r

7,

e x p e r i are

n e w

role.

v i e w

o f

closely

D u r i n g

i m p o r t a n t

a t t e n t i o n

w a s

t h o s e

b r o u g h t

as is characteristic

particular

n e x t

b y

decisively

i n f e r e n c e

a n

t h e in

c o u l d

t o o l s

are

statistical

c o n s i d e r a b l e

t h e

inferential

p i i v a t e

b e c o m e

c l o t h e d

In

cru-

k i n d

o f

d e s c r i b e d

in

specialist.

d e a l i n g

a d v a n c e

has

s h a r e d

m e t h o d s

d e v e l o p m e n t s ,

o f

b e

science.

o n

places,

d e m o c r a c i e s ,

t h e

T h o s e

t h e

life

a n d

t o

intuition,

a n d

statistical

m e t h o d s

p l a y e d

o n

reliance

social

t i m e s

priests o f

accountability,

" o b j e c t i v e "

e p i t o m i z e

for

h i g h

s u c h

n e e d

m o d e r n

N u m b e r s

t h e

n o

p u b l i c

in

authority.

professional,

h a d

relying

e x p e r t s

a r m e d

P e r h a p s

elite

experts

t h e

societies,

d e m o c r a t i c

little

a n d

o n

i m p o r t a n t

less

h a v i n g

balling

t o

utilitarian

c o n c l u s i o n s

political

m u s t

still d e p e n d e d

a n d

u n a c c e p t a b l e .

inference

t h e

this

tied

last

O n e

in this chapter.

o f

o f

t h e

a b o u t story, t o

t h e

century, these,

T h e

w o r l d b y

t h e

t h e p r o -

d e v e l o p t w o

s u c h

agriculture,

o t h e r ,

g e n e t i c s ,

chapter.

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W h a t

does

chance

William

ever

Paley

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for

us?

(1802)

4 >


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is

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transition



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Planck's radiation

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V =

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light

further

radiation

light).

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recoil

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s p e e d

p r o b a b i l i t i e s Am>]

w a s

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radiation. T h i s

( [ 1 9 1 6 ] 1 9 1 7 ,

f o l l o w i n g

t h e n

w a s

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o f

w i t h

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e m i s s i o n

spherical b y

c o u l d

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w

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s u r r o u n d i n g

the

e n e r g y £

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phycisists

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p r o c e s s "

theory.

p l a c e d

for

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a n d

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inevitable

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the

for

o f p o s s i b l e

b e t w e e n

particle

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s p o n t a n e o u s

his

t h e

E i n s t e i n

radiation

q u a n t u m

all k n o w n

active

t h e

discrete

radioactivity o f

o f

o f

o n l y

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p e r

t h e

etc.

a m o u n t

f r o m —

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c a n

this:

transition

the

o r

Z„,

an

probabilities

(2)

,

w

states

w a s

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b y

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idea

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q u a n t a

has a spatially w e l l - d e f i n e d

t h e

quanta, t h e

for

t h o s e

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f r o m

p r o b a b i l i t y

for

e q u i l i b r i u m

e n e r g y

o f

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i n d u c e d

d e n s i t y

c o n d i t i o n

i m p o r t a n t

t h e r m a l

ture

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t h r e e

m o l e c u l e

states

a b s o r p t i o n

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a

c o u l d

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discrete

f u r t h e r

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specific

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m a n n e r .

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o f

f e w

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a n y

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o n

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physics

transitions

o n

characterized

p r o c e s s

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B o h r ' s

light

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w i t h o u t

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m a t t e r

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o f

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in

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stztcs

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probabilistic

t h e p h i l o s o p h i c a l e m i s s i o n

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t h e

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light

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c o n c l u d e d

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The

b y

' c h a n c e ' , "

1 2 7 ) .

at

least

A l t h o u g h

fully

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its

t h e o r y

t i m e

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( [ 1 9 1 6 ] 1 9 1 7 , " d u r a t i o n "

p p .

s u c h

a

b e c a u s e

o f

p r e d i c t i n g

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in

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t h e

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p .

least,

I

w a s

g e t

o t h e r ,

t h a t

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r e p l a c e d

emission,

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is

e v i d e n t .

d e e p - r o o t e d

a

closer

reliable

t o t h e

n o t

t o

t h e

w o r d t o

t h e

t h e

d u r a t i o n

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p h y s i c a l

p h i l o s o p h i c a l

t h e

i s o l a t e d

p r o b a b i l i s m

h a d

b e c o m e let

I

o n e . "

r e f e r r i n g

w i t h

t e r m

t h e

it l e a v e s

h e r e

a n

t h e

o f

'chance'. N e v e r t h e l e s s

o f

p u t

u s a n y

(p.

u n e a s y

w e a k n e s s

o b v i o u s l y

c o n s o l i d a t e d ,

t h e o r y "

p r o f o u n d l y

n o t

t o

7 6 ;

t h e

" T h e

t h e

c h o s e n

E i n s t e i n

b e i n g

at

o n

p r o c e s s e s

c o m p a r i s o n

f r o m

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it d o e s

t h e o r y ;

o f

w a s

t h a t

d i r e c t i o n ,

f o r

h e

w r o t e :

m o m e n t

o n e

e v i d e n c e

far

fact

1 9 7

s t a t e

h e

trans,

E i n s t e i n ' s

h i m

t h e o r y

a p p r o a c h

" t i m e , "

radioactivity, it

t h e

p r e s e n t

this

w a v e

w i t h

d r a g s

t h e

e l e m e n t a r y

t h a t

i n p h y s i c s

T h u s

t h e

E n g l i s h

t h i n k i n g

Y e t

w i t h

t h e

p r o c e s s . )

t h e o r i z i n g

in

1 2 7 - 8 ;

impossibility

o f

o f

b y

s t r u c t u r e . h a n d

revolution

t o

c o n v i n c e d

o n e

d i r e c t i o n

fully

o f

" a c c o r d i n g

p r o b a b i l i s t i c

lies o n

m a k i n g

probabilistic

p h e n o m e n o n m u c h

a l o n e

" c h a n c e "

h a b i t s o f

s t r o n g e r .

intellectually

b e t w e e n

i n v e r t e d

c o m m a s . P h i l o s o p h i c a l l y w i t h

t h e

p a r a d o x e s

q u a n t u m h e

t h e o r y

e x p r e s s e d

w a v e

a

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t h e

firmation

o f

as

q u a n t a

t h e

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a

c o n c e p t i o n s

III.l).

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d e n c y

t o

T h i s

p r o c e s s e s o f

h o l d

a n d o f

r a d i a t i o n .

r e q u i r e d

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t h e

o f

in

e m i s s i o n O n

t h e

particle

its

a n d

a

n e e d

c o m p l e t e

a p p l i e d ( 1 9 2 4 )

in

t h e

t o

a b s o r p t i o n

o n e

h a n d ,

idea o f a m a c r o s c o p i c

free

t h e

in

f r o m

g r o u n d s

I n d e e d ,

statistics

w i t h

".

o f

o f

o f

c o n -

g e n e r a l

l a w s

i n d i v i d u a l

. . i n

c o n t r a s t

in

n u m b e r

w h i c h

o f

t h e

b y

t h e

e x i s t e n c e

c o r r e l a t i o n

c o n t i n u o u s o f

b e t w e e n

w i t h

b y

t h e

u s e

a

t e n -

B o h r ,

e l e m e n t a r y

w a v e

distant

t i m e

p r o c e s s e s .

o f

i n t e r f e r e n c e

is

( 1 9 2 3 / 2 4 ,

a t t e m p t

e x i s t e n c e

it

a n d

i n d i v i d u a l

r e m a r k a b l e

t o

i n d i v i d u a l

s p a c e

c o m b i n e d

o f

a n d

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in

p h y s i c s

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radiation.

t a k e n

e v e n

t h e

e n e r g y

c o n t r a d i c t i o n

w a s

d e s c r i p t i o n h i g h l y

b e

t h e

t h a t

B o h r

t h e

n o t

t e r m s

o n

( 1 9 1 8 - 2 4 ) ,

e l e c t r o d y n a m i c s "

r e c o n c i l e

a n d

t h e

s t r u g g l e d

p a p e r s

a t o m

r e t e n t i o n

classical

classical for

t h e

c o n c l u s i o n :

p r o c e s s e s

a m a n n e r

his

m o m e n t u m ,

in

also

c o n c e p t i o n

c o u l d

strict

a d i f f e r e n t

f r o m

t h e

f r o m

Slater

o n

as well.

h y p o t h e s i s

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I n

c h a r a c t e r i z i n g

t h e

w i t h

B o h r ,

o f

o f statistical results o f a g r e a t

o n

w a s

results.

s t r u c t u r e

V

p h e n o m e n a

t h r o u g h

e m p h a s i s

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q u a n t u m

b y

e n e r g y

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s t r a t e g y

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p i c t u r e

d e s c r i p t i o n

c a r r i e d

t h e

q u a n t u m

n a t u r a l

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t h e

f r e q u e n c y

o f

like

i n d i s p e n s a b l e

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a l w a y s a q u e s t i o n

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t h e

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particle

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line

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t h e o r y

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less c o n s e r v a t i v e

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a n d

198

The

a b s o r p t i o n g e s t e d o r

processes.

t h a t

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7 8 5 ,

788,

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1 5 6 ) .

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h e

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t h e

o n l y

r o o m

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in

r e j e c t i o n

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m i c r o p r o c e s s e s ,

t h e

in

a n d

individual

p r i n c i p l e s

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e n e r g y ,

and*

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t h a t

a

t h a t

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t h e

t h e

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c o r r e c t

s p a t i o - t e m p o r a l

r e p r e s e n t a t i o n

s c a t t e r i n g

strict

1 9 2 5 ) .

still u n k n o w n

" o r d i n a r y

w r i t t e n ,

q u a n -

B o h r - K r a m e r s - S l a t e r

e x p e r i m e n t s

a n d

t h e

d e f l e c t i o n

i n c l u d i n g

single

w a s

v a r i a t i o n

recoil e l e c t r o n w a s

a n d

t h e

w a v e

a classical p h y s i c s

its o b j e c t s

a n

K r a m e r s ,

m e a s u r e d

r e a c t i o n

t h e o r y

p i c t u r e s "

o p t i c a l

coinci-

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t o

w o u l d particle

p h e n o m e n a

( 1 9 2 5 ,

right.

p a r t i c l e

o f

b y

C o m p t o n

f r o m

B o t h

m i n a t i o n

t h e

e a c h

p r o v i d e d

s u r m i s e d

w a s

p r o v e d

r e f u t a t i o n

1 9 2 5 ;

as

s e e m e d

a t o m s ,

a b o u t

c o n c e r n i n g

r a d i a t i o n ,

in

G e i g e r ,

far

h e

o f

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results

w i t h

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equally

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l a w

-

d i s t a n t

said

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m o m e n t u m

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his

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results,

t h e

strictly

s p a t i o - t e m p o r a l

H e n c e

b e e n

s u g -

i n t e n s i t i e s

" f o r m a l

c o n s e r v a t i o n

h a d

f o r

B o h r ,

p i c t u r e

A

a n d

deviate

p a r t i c l e

e l e c t r o n .

t h e

b y

X - r a y s

a n

o f

W h a t

( 1 9 2 3 ) , in w h i c h

a n d

d e n c e

basic

c l a i m e d

p u b l i s h e d

m o m e n t u m

h o w e v e r ,

( B o t h e

p a p e r

s c a t t e r e d

v i e w ,

t h a t

a

t h e

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l o w

p r o b a b i l i t y

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e n e r g y

a v e r a g e .

o n l y

o f

l i g h t

e x p e r i m e n t s

d e s c r i b e

o f

for

o f

7 9 3 ) .

a l r e a d y

E i n s t e i n ' s

v a t i o n

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n o w

n o t

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c o n s e r v a t i o n

w a s

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C o m p t o n

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all

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this

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t h e

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o t h e r

d o e s

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d i r e c t i o n s ,

t h e

t h a t

e m i s s i o n s

m a c r o s c o p i c

l o n g

statistical

w i t h

t h e o r y

i n d i v i d u a l

p r o c e s s e s .

o n

a

r e s t r i c t e d

u n t e n a b l e

q u e n c y

-

O n

physics

q u a n t u m

s h o u l d

d i f f e r e n t

t h e o r y .

a b a n d o n e d

r a d i a t i o n o n l y

7 9 0 )

b u t

p o s s i b l e

w a v e

i n

in

Einstein's

p h e n o m e n a

t r a v e l l i n g

t h e

revolution

A l t h o u g h

i n t e r f e r e n c e

r e c o n f i r m e d ( p p .

probabilistic

t e r m s b o t h

o f

c h a r a c t e r i z e d

m a n i f e s t

p i c t u r e s ,

d e s c r i p t i o n

d e s c r i p t i o n

r e p r e s e n t a t i o n

t h a t

a n d

b y

t h a t

i n d i v i d u a l

essentially

c o n c e i v e d

c o m p l e t e

visualizable

t h e r e f o r e ,

o f

t h e

w e r e

d e t e r -

p r o p e r t i e s .

finally

p r o v i d e d

m i c r o - o b j e c t s

i n v o l v e s

It

a n d

p r o b a b i l i s t i c

p r o p e r t i e s .

Q u a n t u m

D u r i n g

t h e

first

t w e n t y - f i v e

a n d

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t h e

i m p o s s i b i l i t y

o f

a n

years

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this

c e n t u r y

t h a t

t o

a

s o m e

m a s s

o f

e x p e r i m e n t a l

physicists

s p a t i o - t e m p o r a l - c a u s a l

s u g g e s t e d

p i c t u r e

o f

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t h e

The

m i c r o w o r l d , until

t h e

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a

radical

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s u m m e r

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probabilistic

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spectra

g e o m e t r y efforts

p o i n t

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w a s

c o n c e p t s

a l t o g e t h e r

1928, p p . s i m p l e t i m e A s s u c h

1 8 7 - 8 ) .

a

a c o n s e q u e n c e

o f

i m p o s s i b l e

t o

b u t

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b y

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w i t h

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o f

value

probabilities t h e y b e i n g

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o f b y

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articu-

t w o

so-called

c o n j u -

n u m e r i c a l

value,

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T h e y

is

t h e

w e r e

c o n t e n t

e x t r e m e l y

classical

physics

A

direct

m o r e is

c o u l d w a y

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o f b y

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m a g n i t u d e s

u p

the

a n d

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characterize

different

m a g n i t u d e t h e y

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t h e

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b u t

t o

m a g n i t u d e s ,

o f

say,

a precise

o u t

b e t w e e n

to,

w a v e

infinite

( 1 9 2 7 )

t h e

h o w

m a k i n g

a n

at

physical

values.

n o n e

dispositional that

e v e n

for

m e c h a n i c s .

classical

o b s e r v a b l e ,

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-

k i n e m a t i c

2 8 - 9 ;

a n

a

r e p l a c e m e n t

character

relations."

n u m b e r s

o f a transition

are

o f

include

m a g n i t u d e ,

either

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r e n d e r e d

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i n t e n t i o n

probabilities, t h e

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least

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essential

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classical

A t

f a v o r

b y

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b e e n

t o

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s i m u l t a n e o u s l y

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probabilistic

T h e

h a d

A s

t h e

p r i n c i p l e s

physical

p o s s i b l y

velocity,

indicates,

n e w

o f

o r b i t s

r e p l a c e m e n t "

establish

e x p r e s s e d

elliptic

o f

p a p e r

o r

1 9 6 7 ,

p o s i t i o n

d i s t r i b u t i o n

at

t o

f o r m u l a

significance,

d y n a m i c a l -

really

a n d

c o n c e p t

this

k i n d

m e c h a n i c s

[i.e. t h e

suitable

n e w

r e p r e s e n t a t i o n

o r

5.1).

a t t e m p t

original

a

t h e

w a s

a c c o m -

"I a m

circular

o f

relating

n u m b e r s ,

v a l u e s

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f a m o u s

t h e

t h e

theory.

r e p l a c i n g

n o

c o m p a t i b l e

H e i s e n b e r g ' s his

(see

title

b u t

1 9 2 5 :

physical

a

W a e r d e n ,

say,

m a t r i x

precise

a p r o b a b i l i t y

for

o f

d e r

o f

possibility

c o u l d

H e i s e n b e r g ' s

p o s s i b l y

t h e

t h e

is f o r m a l l y

array

finding

d e t e r m i n i s t i c

w a y

v a n

least

W e r n e r

a letter

m a t r i x

9,

t h e

killing

i n t r o d u c e

f u n d a m e n t a l l y .

d e t e r m i n i s m

i m p o r t a n t

in

w h i c h

p r o p e r t i e s o n l y

o f

ascribe

-

n e w

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I n

o n

m i s s i n g

his m o t i v e s

f o r m u l a

o f

t h e

at

picture,

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c h a n g e d

m o m e n t u m lation

a n d

t o

represent, o r

relationships

g a t e

that

a n d

t h a n

T h i s is w h a t

"matrix,"

as p o s i t i o n

o n l y

(cf.

h a v e

2 7 ) .

particle

f r a m e w o r k

n u m b e r s

b y

t h e

t e r m s

c o m p l e t e l y

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rather

o v e r

an

at

R y d b e r g

in

o f

a b o v e .

Pauli o n J u l y

t h e

n o t

a n y h o w ,

r e p r e s e n t a t i o n

s p a c e - t i m e

d o e s

1 9 6 7 ,

t o

still

a c c o u n t .

it. O n e

revolutionary p a p e r

a t o m s ]

a i m

o b s e r v e d

a statistical

-

o f

W a e r d e n ,

H e i s e n b e r g ' s

r e f e r r e d

o f

w a s

alternative

t o w a r d

t o his friend W o l f g a n g

that

199

o f particles. W h a t

s t e p

c o n j e c t u r e

c o n v i n c e d

o r b i t s

o r

in physics

c o h e r e n t

decisive

B o h r ' s

the m a n u s c r i p t

( 1 9 2 5 ) ,

o f w a v e s

1 9 2 5

t h e

revolution

are

m a t r i x ,

states o f in

n o t

o n e

p r o p e r t i e s ,

ascertained

b y

s u c h

set

a s y s t e m

o f

m a n i f e s t

a

h e n c e

t h e

o f o r

states.

p r o p e r t i e s . as t h e

o b s e r v i n g

an

p r o p entire

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200

The

s p e c t r u m m a t r i c e s o f

o f d o

e v e n t s ,

o u t

classical

( 1 9 2 6 a )

n a m e d

h i m .

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S c h r o d i n g e r p r o p e r t i e s o l d e r

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q u a n t u m

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d e f l e c t e d

b y

n u m b e r , s e n t e d

t h e had

s u c h

o n

as

t h e

cases

the

r e g i o n s

his

b e e n t h e

as

e n c o u n t e r e d

that

b e

o f

w a v e s

that,

w i t h o u t

a

o f

n e w

c o n t i n u i t y

ideas

a n d

n o

less

t o

b e

w a s

s o o n w i d e l y

o u t

Sig-

t h r o u g h

e n c l o s e d

in

a

u n d i s t u r b e d

a

finite

r e g i o n .

m i c r o - s t r u c t u r e .

m o r e

t o

d e r i v e o f

t h e

w a s

than

b e c a u s e

f r o m

t h e y

optics.

T h e

r e i n f o r c e d

s h o w e d

light

t h e

attractive

h o w e v e r ,

familiar

t h a n

L o u i s E r w i n

a s s u m p t i o n

w h i c h

t h e

p r o b l e m s .

u s e d

physics

o f

m o s t

t h o u g h

a p p e a r e d

1 9 2 7 )

o f

w i t h -

o f

that

n o t

a d - h o c

classical

G e r m e r ,

w a v e s ,

i n d e e d

p i c t u r e s

typical

m a t t e r ,

stable

kinematics,

o f

are

c o n f i n e d

t h e

w a v e s

traditional

a n d

that

c o u l d

o r

q u a n t u m

o b t a i n e d

that s p r e a d

a

chain

stable

are

e q u a t i o n

w a v e s

f o r e v e r

a

character

c o n v e n i e n t

r e p r e s e n t

t h o u g h t

p o s s i b l y

t o

H e

entails

w i t h

In

that

t o

t o

w h e n

electric

o r

that

b y

elec-

X - r a y s ,

s u c h

as

r e c o g n i z e d d e a l i n g w i t h

b y

t h e

w h e n

M a x

dissipate

stage

B o r n ,

that

packets.

o f

o f

t h e

o f t h e

r e p r e c o n v e n particle,

a p p e a r a n c e s in

a l m o s t

theoretical

e l e c t r o n s

w a v e s ,

b y

i n t e r a c t i o n

w a v e s

all

e v e r - e x p a n d i n g

p r o b l e m s

light arise for m a t t e r

the

c o m p l e x

m o r e

B u t

o v e r

t h e

o f

m e a n i n g )

particle-like

scattering

final

a

a well-localizable

t h e

b e h a v i o r

s q u a r e

b e i n g

physical c h a r g e

w a v e

packets

a b s o l u t e itself,

o n

e x p l a i n

this

particles again in t h e w a s

i m m e d i a t e

the

w a v e

t h e

a m p l i t u d e

so-called

the

that

concentrated

tried

contrast

particles,

a n

o f

b e

c o n s t r u c t i n g

first

( t h e

h a v e

d i s t r i b u t i o n

s u p p o s e d

b y

at

f u n c t i o n

electron.

a l w a y s p r o d u c e M o r e o v e r ,

also

again

like

w a v e

space.

e x p e r i m e n t s

-

w i t h

t h e

n o t

theory o f

b u t

w e l l

D a v i s s o n

d e n s i t y

w a v e s

m o s t

a

w a y

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w a v e

o r

t h e

structures.

p r o p e r t i e s

w a t e r

his e q u a t i o n

t h e r e f o r e

c o u l d

tionally

o f

o f

this

result m i g h t

the

rate,

crystal.

S c h r o d i n g e r a m p l i t u d e

o r

-

n o t i o n

b e h a v e d a

I n

o n l y w a v e s

S c h r o d i n g e r ' s

k e e p i n g

p r e s e r v i n g

n o t

r e m a i n

a t o m

theory.

in

e x p e r i m e n t s

walls

that

B o h r ' s

H e i s e n b e r g ' s

light

m i g h t

s h o w e d

t h e

characterize

stable

f a m o u s

b e c o m e

n e v e r t h e l e s s

w a v e s

o f

a n y

e v e n t

n o n p r o b a b i l i s t i c

w a v e l i k e t h e

a n

a s s u m p t i o n s

P u r s u i n g

d e s c r i b e d

like

reflecting

o u t s i d e ,

S u c h

-

t h e

o f

a t o m .

s a m e

a n d

A t

f o r d o i n g all s o r t s o f m i c r o p h y s i c a l

this e q u a t i o n

indefinitely

vessel

w e r e

t o o l

T h e y

a d - h o c

as if t h e

o n

t o

d e s c r i p t i o n

a c c o u n t s

d i s c o v e r e d

It w a s

m a t h e m a t i c a l

space

a n d

physics

c i r c u m s t a n c e s .

process.

pictures.

1 9 2 4 )

in

h y d r o g e n

theoretical

S c h r o d i n g e r

nificantly,

a

c o m p l e t e n e s s

(e.g.

after

as

arbitrary

s p a t i o - t e m p o r a l

B r o g l i e

u s e d

s u c h

it s e e m e d

t h e

v a r y i n g

c o n t i n u o u s

t h e

a brief t i m e

u n d e r

a

q u a n t u m

revolution

a s p a t i o - t e m p o r a l

a l o n e

sacrificing

d e

g i v e

a v o i d s

earlier F o r

n o t

structure,

m e c h a n i c s t h e

reactions

let

l o n g - l i v e d

probabilistic

m a t t e r , p r o c e s s .

E i n s t e i n as well.

h a d

I n

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t h e

The

case o f that

t h e

t h e

w a v e ,

w h e r e a s

e l e c t r o n s

e a c h

It r e m a i n s

Einstein's

light

t w o

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" o n l y

S c h r o d i n g e r ' s p r o b a b i l i t y

e q u a t i o n

( C a r t w r i g h t ,

T h e s e

1 9 8 7 ) .

s h o w n

probabilistic

m a g n i t u d e

g i v e n

physical

w a v e s

at a g i v e n

urable

physical

m o m e n t u m ,

is

at

o f

a n c e

t h o s e

( 1 9 2 6 b ) ,

this that

his

e q u i v a l e n t ,

H e n c e ,

as

B o t h i n g

far

as

a p p r o a c h e s

dispositional

c o n c e p t u a l

t o o l s

it w a s

n o t as

alike

s o l v e

p r o p e r t i e s ,

full

t h e o r y t h e

as

b e

m e a s u r e d

this

b y

that

directly

real

t h e

in

a

special

n e w

m e c h a n i c s

f u n c t i o n

m e a n s

in

a n

illusion.

first t o

b y

t h e

o f

o f

the

m e a s a n g u l a r

T h e

full

classical

pic-

a p p e a r a n c e physical

Q u i t e

o f

reality,

in

a c c o r d -

S c h r o d i n g e r

h i m s e l f

q u a n t u m in

that

t h e

a n d

o f

deter-

state

states.

T h e

r a n g e

exactly

m o m e n t u m ,

t h e

generally

T h i s

o f

n o

o f

(or

a n y

h a d

w a s

v a l u e

initial

if

w a y

B o r n

is n o w

a n d

t h e

particles,

realism,

o r

[the

o n l y

this

t h e

the

i n t o

i n t e r p r e t a t i o n

differ

o f

f u n c t i o n

i n t e r p r e t a t i o n

o f

r e q u i r e d

correct,

w a v e

p r o j e c t e d

d e t e r m i n a t i o n

p r o b l e m s

B o r n

r e p r e s e n t

a p p r o a c h e s

is

probabilities,

b e

d e s c r i p t i o n .

t h e y

inter-

t h e

p r o c e s s e s

r e c o g n i z e d ,

m u c h

b e

c o n t i n u o u s

directly

t o

c o u l d

h e

r e c o g n i z e

p r o b a b i l i t y

a n d

c o u l d

Instead, t o

particle.

p o s i t i o n ,

p r o v e d

H e i s e n b e r g ' s

h o w e v e r

a

w a v e s

o u g h t

a g i v e n

forces

material

a n d

s o o n

q u a n t u m

o f

t h e

S c h r o d i n g e r ' s

a p p r o a c h ,

a n d

strictly

d o

s u c h

c o m p l e t e n e s s

result,

finding

characterizations,

w i t h

S c h r o d i n g e r ' s

w i t h

t h e y

characterize

variance

s p a t i o - t e m p o r a l u n d e r

B u t

the

T h i s

i n d e e d

c o n d i t i o n s ,

p r o p e r t i e s ,

w h i c h

d e t e r m i n a t i o n tures,

time.

are

o f

B o r n ' s

o f

t h a n

H e i s e n b e r g ' s

m o t i o n

a c c e p t s

at o n c e .

less

m e a n -

t o

w e r e

v e r s i o n

t h e

d e t e r m i n e

t h e

o n e

n o

t h e

o f

t h e

will

forces

characterizing

t h e m s e l v e s

w e

possible":

"defines

n o t

p r o b a b i l i t y

a

b y

is

probabilities o r

w e l l - d e f i n e d

m a t t e r .

transition

reflect

the

values)

m i n e d

t u r n

a c c e p t e d

d e f i n e

w a v e s

o f

t h e

o f

t h e n

A c c o r d i n g

w a s

t o

S c h r o d i n g e r ' s

that

in

that

that

i n f l u e n c e

H e i s e n b e r g ' s .

u n d e r s t o o d o f

s t r u c t u r e

direction]

S c h r o d i n g e r ' s

f u n c t i o n

t h e

the

spherical

a b s o r p t i o n .

c o n c l u d e d

8 6 5 ) .

B o r n ,

t h a n

for

p r e d i c t s

e x p a n d i n g

scattering p r o c e s s e s

b)

square)

W h e t h e r

that

travel in a

i n t e r p r e t a t i o n

s h o w s

F o r

t o

arrays

p.

t h e o r y

is f o u n d

w a v e s . W h a t

a particular

t h e

a n

c o n c l u s i o n

u n d e r

as

( 1 9 2 6 a ,

w a v e s .

S c h r o d i n g e r

t h e

a b s o l u t e

[ f r o m

statistically.

less

o n e

its

c o m i n g

certainly

t o w a r d s

P r e s u m a b l y

d i r e c t i o n "

o n l y

d e s c r i b e

w a v e s ?

precisely,

n e w ]

t o

m a t t e r in

available

( 1 9 2 6 a ,

b y

201

o u t w a r d

f u r t h e r

r e a l i t i e s : p a r t i c l e s and

that

e l e c t r o n

B o r n

t a k e n

d r i v e n

for

r e m a i n

situation

t h e m s e l v e s

f o u n d

i n g

this

q u a n t a

f l o w

e l e c t r o n

available

in physics

o f e l e c t r o n s

will

particular

direction.

n o t

revolution

s c a t t e r i n g o f a b e a m

e m e r g i n g

F r o m

probabilistic

d y n a m i c s

m a t h e m a t i c a l

are

f o r m .

p r o b a b i l i t y

is

irreducible.

m i c r o p h y s i c s

b y

i n c o r p o r a t -

probabilities,

a m o n g

t h e

basic

physics.

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202

The In particular,

ing,

the

probabilistic

as t o

h o w

can exist. Maxwell's puzzle a t o m s o f different It

s u p e r t h e o r y

is

stable

significant

o f change

a n d

a n d

transitions

structures

a n d

m o t i o n s ,

that

this

m o t i o n ,

such

b e t w e e n h o w e v e r ,

c o n q u e r e d

o f this w o r k

became,

as it w e r e ,

intricate

historical a n d

these

o f

t w o

the

a

central

a

bridgehead

reason

will

to stay w i t h

only

h u m a n

the

answerkinds

the existence

d o n e

in

t e r m s

o f

T h e

o f

to

a n o t h e r

o f the p r o d u c t i o n

position and

very c o m b i n a t i o n b e in

the

d e e p e r

physics

radiation, a n d

o f

stable

reason

since

e m p i r e

o f

o f

possible

w h y

Bohr's

and

certainly since

mechanics. Statistical physics

the

is

s o o n

o f

b u t

change.

lose

us. T h e

mind,

different

its

in

It

chance.

W e

o f chance

the

a n d

is h a r d

impact.

e m p i r e

also

from,

o f was

In

spite

the thus

o f

systematic relations b e t w e e n t h e r m o d y n a m i c s

probability in

matter

irreversibility

reasons

n o t

appears

by q u a n t u m

p r o b l e m

for

well-distinguished

as a t h e o r y

t h e m .

consolidation

this

o f

finally resolved;

was

o n

theory

a perspective

exemplars exactly resemble each o t h e r

Einstein's pioneering w o r k

q u a n t u m

physics

(as M a x w e l l h a d envisaged), b u t in t e r m s o f

structures

has

structures

(cp. 5.3) w a s

sorts w h o s e

a t o m s a n d molecules

probability

in

they answer, o r at least p r o v i d e

question

explained.

revolution

just to

m a y seems

constitution

as

see

d e e p that

o f

be the

a n d the

either

therefore to

as,

all

o f

expect

r o o t e d

n o t

universe.

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[Statisticians] conquest

have

rivalled

already

only

by

o v e r r u n Attila,

every

branch

M o h a m m e d ,

o f

and

science

the

w i t h

a

C o l o r a d o

rapidity

o f

beetle.

M a u r i c e

Kendall

(1942)

6 =

s t u d y .

m e t h o d ,

itself

as

a n

O n c e it

w a s

i n t u i t i v e

statistician. A r o u n d c e p t i o n m i n d

a n d

as

b e t w e e n a n

e v e n t ,

v i e w .

I 9 6 0 ,

statistician. t w o

t h e

p u t e r .

T h e s e

a n d

p s y c h o l o g y

radically

Q u e s t i o n s

a

p r o b l e m , a r e

likelihood

e s t i m a t i n g t i m e

t w o A n d in

t h e

r e v o l u t i o n a r y

t h e y 1 9 6 0 s

as

m e t a p h o r s

b y

d o e s

t h e

t h e

t h e n

s t e m

rise

t o o l s :

o f

t h e

t h e

s c h o o l statistics

t h e

c a u s e

t o

p o i n t

o f

c a l c u l a t i n g

m e t a p h o r

o f

a

n e w

setting

its n o v e l t y

d o m i n a n t

f r o m

203

m i n d

this

o n e :

p e r -

d i s c r i m i n a t e

a t t r i b u t e

samples,

as

m e t a p h o r :

t e r m s

T h i s

s u c h

m i n d

f r o m

similarly p o w e r f u l o f

n e w

t h e

in

r a n d o m

p r o b a b i l i t i e s .

science

a

as a p e r s o n ,

d e s c r i b e d

'accelerated o v e r

p r o c e s s e s

a p p r o a c h e d

ratios, t a k i n g

n e w

h o w

o b j e c t

t o d a y

p r i o r

t h e

a n

c o g n i t i v e

t r a n s f o r m e d

w e r e

as a n o t h e r ,

g a v e

o f

s u c h

r e c o g n i z e

f u n c t i o n s

s a m e

v o c a b u l a r y .

B o t h

s o l v e

a n d

a b o u t

w a s

s o u n d s ,

o r

probabilities

u n d e r s t a n d i n g

t h i n k i n g

B r a i n

c r i t e r i o n

o u r

a

decision

e m e r g e d

m i n d

as

at

c o m -

a n d

c o n c e p t u a l

n e w

c o g n i t i v e

o f

b e h a v i o r i s m .

a n d

c o m p u t e r s

Statistics

204

w e r e

originally

m i n d ,

t o o l s

t h a t

t h e m s e l v e s W h a t c a r e e r

t o o l s

t o

a r e

c h o l o g y

a

a

t o o l

f o r

t h e

a n

w h i c h o f

i n s p i r e d

cast

t h e s e

m a k e s a b l e

n e w

c e r n i n g

o f

classical

t h e

I n

t h e

a g a i n

First,

t a u g h t a n d

a n d

h a n d s

o f

n e w

h o w

p e o p l e

results,

o f

a n d

in

s h o u l d

a n d

a

o f

w a s

h o s t o f

o f

o f

S e c o n d , t h e o r i e s ,

T h i r d ,

o n e

t h i n k i n g

t h a t

t h e

r e a s o n -

p r o b l e m s

p r o b a b i l i t y

thinking,

as w e l l

p s y -

r a p i d l y

it.

r e v i v e d

rationality,

t h i n k

l e n d

e n t e r e d

r e a s o n i n g .

psychologists w i t h

o f

c h e c k e r e d

c o g n i t i v e

effect

h i m ,

t h e

r e q u i r e d

i m p l i c a t i o n s

s y n o n y m o u s

o f

p s y c h o l o g y

its f o c u s , w i t h

p r e s t i g i o u s

statistics

r a n g e

t h e

science

m i n d .

a c c o u n t

m e m o r y ,

a n d

t h e

o f

r e c e n t

a n d

j o u r n a l s

v a r i e d

n o r m a t i v e

b e c a m e

itself w i t h

a n d

d e v e l o p m e n t s ,

p r o b a b i l i t y ,

t h e

i n f e r e n t i a l

it,

u n c e r t a i n t y

d e s c r i p t i v e

o n c e

c o n c e r n e d

u n d e r

m e t a p h o r s

p e r c e p t i o n ,

t h e o r e t i c a l

statistics.

t h e o r y

o n

I n

e x p e r i m e n t a l

i m p r e s s i v e

l i g h t

j u d g m e n t

m a n

a n d

n e w

scientist.

a b b r e v i a t e d

a n a l y z i n g

t e x t b o o k s

mind

as i n d i s p e n s a b l e

i n t o

p s y c h o l o g y .

i n s t i t u t i o n a l i z e d : t o o l

b o t h

necessarily

i n

the

b e h a v i o r a l

c o n s i d e r e d

is

statistics as

t h e

t r a n s f o r m a t i o n

f o l l o w s

o f

o f

of

c o n t h e o r y

probability

a n d

p s y c h o l o g y

as h o w

t h e y

i n

fact

d o .

6 . 2

T H E

B e f o r e

1 9 4 0 ,

m e n t a l

p s y c h o l o g i s t s ,

t h e o r y tics.

statistical

c o n s t r u c t i o n .

T h e

" f a t h e r

v o l u m e

o n

1 8 9 7 ) ,

w e r e

f r o m

m e n t s

o f

ideas a n d

o f

a n d

u s e d ,

c o n s i d e r e d

t h e

f o r e m o s t

p e n s a b l e T h e

N e w t o n i a n like

t o p i c

e l e m e n t

ideal

a n d

h a d

t h e o f

p r o t o t y p e

as

o f

o f

t h e

o f

i g n o r a n t

t o

it

statis-

w r o t e

o f

a

v a r i a t i o n

m e a s u r e W h a t

ideas

a n d

o f

i n

Kollektivmasslehre

t h r e s h o l d s .

m e t h o d ,

r o l e

F e c h n e r ,

coefficients

i m p o r t a n c e .

e x p e r i -

n o

as

discipline

e x p e r i m e n t a l

w e r e

w a s

n o t

t h e

w e

ele-

call

k n o w n

Statistics

L e w i n

a r g u e d h e

t h e

( L e w i n ,

t h e

w a s y e t

d e t e r m i n i s t i c is n o

a n d

C l a r k

H u l l ,

G a l i l e o ' s o f

H u l l ,

as a

a n d

n o t

a n

t h e

y e t

indis-

d e t e r m i n i s t i c

e x p e r i m e n t a l

t h e r e

l a w

1 9 3 5 ;

o f

t h a t

c o n s i d e r e d a n d

p s y c h o l o g y

P i o n e e r s

a b o u t

discipline, a n d

l a w s

n o t

o f

c o n s t r u c t i o n .

d o u b t s

r e s e a r c h

a n d

t o o l s

a l m o s t

T h e o d o r

statistical

first

as

p l a y e d

p u b l i s h e d

n e w

w h e r e

r o l e

h o w e v e r ,

as s e n s o r y

w i d e s p r e a d .

b e h a v i o r i s m ,

p s y c h o l o g i c a l

t i m e

t h e y

G u s t a v

t h e

P E R I O D

m i n o r

m e a n s ,

p s y c h o l o g i c a l

w a s n o

o f

s u c h

t h e o r y

K u r t

a strictly s y s t e m a t i c A m e r i c a n

a

s e l f - i m a g e

logical p r o c e s s e s .

o f

is

i n

in

s c i e n c e

H e l m h o l t z

start

e x p e r i e n c e ,

p e r i o d

n o t

w e r e ,

p e r c e n t a g e s , v e r y

a

1 9 5 0 ,

p o s t h u m o u s l y

pre-statistical b u t

b e f o r e

o n l y

p s y c h o p h y s i c s , "

t h e

m e n t a l

p l a y e d

P s y c h o l o g i s t s

statistics,

( F e c h n e r , u s e d

P R E - S T A T I S T I C A L

s t u d y

falling 1 9 4 3 ) .

n a t u r e

p l a c e

f o r

o f

o f

late

t h e as

i n

t h e o r e t i c i a n

falling as

p s y c h o -

statistics

a m a j o r

b o d i e s A s

p s y c h o l o g y

b o d i e s

as

p r o t o t y p e

1 9 5 5 ,

D a v i d

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Statistics

K r e c h , faith:

a

l e a d i n g

t h e

b e l i e f

e x p e r i m e n t a l i s t , t h a t

w e

c o r r e l a t i o n s

r e s p o n s e .

c o u l d

n o t

E x a m p l e s

t h e

tistical

m o d e l

w e r e

for

qualities, d e c a d e

f o u n d

S.

a l m o s t

p a r t

o f

w h i c h

N o n e

o f

m e t h o d

T h e

d r e a m

peculiar

o f

b e h a v i o r

t h e

n o t

a n d

p s y c h e

h i s t o r y

a r o u n d

t h e

c u l a b l e

G r e a t

-

o f

u s e

M a n

(e.g.

m e t h o d s

d e s c r i p t i o n , o g i s t s

u s e d

t w e e n

1 9 4 0

h y p o t h e s i s . non

o f

H o w

u s e d ,

a n d T h e

A

d i d

t h r e e

t h r e e

m e t h o d

E

a n d

issue F o r

t h e

1 9 2 0 s

o f

t h a t

c o n t a i n

W

m o d e l

m e t h o d s

i n d i s p e n s a b l e

w a s

o f

c o u r s e

t h e

t o n g u e ,

all

B o r i n g , o f

o p p o s e d

n o t

S h e r l o c k d e v i a n t

d e t e r m i n e d , G .

o f

( G i g e r e n z e r ,

a n

h i s t o r y

as

B r u n s w i k

if

t h e

n o t d e a n

p s y c h o l o g y t o

t h e

incal-

T O O L S

T h e

o f

as t o o l s : 1 9 4 0 ,

g r e a t

t o o l s

for

i n f e r e n t i a l h a s

e x p e r i m e n t a l

i n f e r e n c e statistics called

c a m e

f r o m as

t h e

t h e

d a t a

p s y c h o l -

b r e a k t h r o u g h

b e e n

f r o m

i n f o r m a l

a n d

r a t h e r

v o l u m e s articles

m e a s u r e m e n t ,

b e -

d a t a

t o

sine

qua

" i n f e r e n c e

1 9 8 7 ) .

i n f e r e n c e s

i n c i d e n t a l t h e

t h e

Z e i t g e i s t ,

t i m e

M u r r a y ,

s p e c t r u m

i n s t a n c e ,

s c a l i n g

t h e

A

c o n s e q u e n c e ,

F r e u d ,

o f

s e n s o r y

m e a s u r e m e n t

c h a n c e

a

f u n c t i o n a l i s m ,

as a

as

sta-

p r o c e s s e s .

statistician.

E d w i n

b e f o r e

statistical

d r a w

w a s

a n d ,

psychically

f u n c t i o n s

w a y s .

d u r i n g

p s y c h o l o g i s t s

t h e

in

N

A l r e a d y

w i t h

( G i g e r e n z e r

e x p e r i m e n t e r . Psychology

all

o t h e r

s e n s o r y

S i g m u n d slip

p h y s i c s

p r o p o s e d

a s s u m p t i o n s

w i t h o u t

t e r m .

a n d

1 9 6 3 ) .

i n s t i t u t i o n a l i z a t i o n

h e t e r o g e n e o u s b u t

s e r v e

1 9 5 5 ,

t h e

a n d

s i m p l e r

o r g a n i z e d

o f

T H E

i n f e r e n c e . i n

e v e n

o f

p r o b a b i l i t y

as

s t i m u l u s

T h u r s t o n e

i n t u i t i v e

e v e r y

t e c h n i c a l

forces

L.

p r o b a b i l i s t i c

d e -

m e c h a n i c s .

p r o b a b i l i s t i c

t h e

laws,

statistical

q u a n t u m

u n c e r t a i n

b y

o r

o f

n i n e t e e n t h - c e n t u r y

T h u r s t o n e ' s

d r e a m

B o r i n g ,

m a y

statistics

scientific

r e v o l u t i o n "

t i m e ?

a n d

a

L.

his

e s t a b l i s h e d

o f

6 . 3

Statistical

t i m e ;

c o n s i d e r e d

effect

b r i g h t n e s s ,

like a n

r e p l a c e d

p s y c h o l o g y ,

d e t e r m i n i s t i c

a l w a y s

t h e

t h e

o f

d i s t r i b u t i o n

p s y c h o l o g y .

detail

t o

1 9 2 7 ,

as a u n i v e r s e

u n c o n s c i o u s , e v e r y

a r e

v o i c e s

t h e

a n d

C o n t e m p o r a r y

l o u d n e s s ,

n e e d

e x p e r i m e n t a l t h e

I n

o p e r a t e s

t h e o r y .

o v e r d e t e r m i n e d o f

c u e s

o r

o f

t o

H o l m e s

t h e s e

c a u s e

c o n f e s s i o n

d e t e r m i n i s t i c

t w e n t i e t h - c e n t u r y

s o o n

d i d

d e t e r m i n i s t ' s

d i s c o v e r

p r o c l a i m e d

at

203

i n d e t e r m i n i s m

n o r m a l

f o l l o w e r s b u t

will

d e s e r t .

a

t h e

b e t w e e n

p e r c e i v e d

s y s t e m

successful,

S t e v e n s ,

t h e

p e r c e p t u a l

n o

o f

B r u n s w i k

p e r c e p t u a l

1 9 8 7 b ) .

in

mind

m u l t i p l i e d .

t h e

t h a t

a s s u m e d

E g o n

t h a t

m o r e

S.

n o r

m e a s u r i n g

later,

t h e

n e i t h e r

v o i c e s

w h i c h

a s s u m i n g

w a s

-

m e c h a n i c s

T h e r e

t h a t

ideal

b e

the

v o i c e d

e v e n t u a l l y

s c r i b i n g o n e - t o - o n e

w a s

of

in

o f

t h e i r

d a t a

f o r m a l t h a n

a p p r o a c h e s

essential

t h e Journal

w h i c h

b e f o r e

results

t h a t w a s

t o

t h e

of

Experimental

are

s u m m a r i z e d

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206

Statistics

a n d

d e s c r i b e d

f e r e n c e s

o n

j u d g m e n t , e n c e s

b y

d a t a

p i c t u r e

e x p e r i m e n t a l issue

o f

s o m e tial

criteria.

statistics. o f

W o l f g a n g

b u t

c o u n t e d

t h e

o n l y

t h e m

i n

o f

in

l e a d i n g

tests

t o

figure

M e l t o n ' s

c a n t

o n l y

c a n t

at

lish

at

t h e n o

0 . 0 1

l o n g e r

c o u l d

W h a t

t h e

f r o m

a n d

n o k i n d

P s y c h o l o g i s t s F i s h e r

h a d

d u r i n g

t h e

level a v o i d

l o n g e r o f first

o f

1 9 2 0 s ,

t o

T h e o f

t o w a r d

t h e

e y e b a l l i n g

y e t

n e e d

t o

i n f e r e n -

P i a g e t

his

o f

o p e r a n t

m e m o r y ,

all

w i t h o u t

f r o m

h a d

areas

t h e I n

level

1962,

d e s e r v e d

a

a p l a c e

h a d

o n his

in

o f

m e s s a g e

m a j o r

8 0 %

t h e

t h e

o f

t h e

u s e d

( T o d a y , his

t h e

last

d i d

n o t

reject signifi-

t h o s e

signifi-

P s y c h o l o g y w h o

t w e l v e

results

w h e r e a s

e x p e r i m e n t e r

t h e

Experimental

t h a t t h a t

in

criteria

of

a n d

j o u r n a l .

articles

significance

s t a t e d

for

m a d e

m a n u s c r i p t s .

o f

Journal

m a n u s c r i p t s

a n

u n i v e r s i t y

journals

1 9 5 9 ) .

M e l t o n

o n ,

h o p e d

s t u d e n t s t o

p u b -

significance. m a d e

F i s h e r ' s

analysis

t h a n

a c c e p t a b l e ,

t h e

o f

b e e n

W .

1 9 4 0

h a l f

u n p r e c e d e n t e d

acceptability

p u b l i s h e d ,

b a r e l y

test

t h e

A .

( 1 9 8 0 )

a b o u t

p u b l i s h e d ,

his e d i t o r i a l p o l i c y

statistics, a n d a v o i d

w a s

(Sterling,

A .

t h a t

1 9 3 9 ,

p s y c h o l o g y

in

n e v e r

w e r e

o f

d a t a

in s h o r t ,

a l m o s t

t h e

1 9 5 5 , m o r e

g u i d e d

w a s ,

o f

R .

p s y c h o l o g i c a l

f r o m

t h a t w a s

1 9 3 4 ,

T w e n e y

a n d

H o w e v e r ,

I n

in

a n d

1 9 3 4

e d i t o r s for

t i m e

R u c c i

statistics

a n d

different

e n c o u n t e r e d

a n d

t h e

principles

o f

o c c u r r e d

m a n u s c r i p t s

statistics

p u b l i s h e d

K a r l

details

laws, J e a n

first

b e t w e e n

o n

B y

1 0 0 % . )

w e r e

0 . 0 5

o r

a n d

c o u n t r i e s .

t h e

small.

criterion

b e g i n n i n g .

m e s s a g e

h y p o t h e s i s

for

still

statistics,

c o n c l u s i o n s 9 0

s p e a k i n g

p a r a p s y c h o l o g y .

m a i n

criteria w h i c h

null

c o u l d

a

a c c e p t a n c e

Psychology,

w a s

t e x t b o o k s

t e a c h

journals

justify

t h e

years.

o f

t h e

is b e t w e e n

for

t h e

o n l y

E n g l i s h

statistical m e t h o d s

significance

this w a s

f o u r

t o

M o r e

d i s t i n g u i s h e d .

n o t

his

differ-

articles

a p p r o a c h

G e s t a l t

t h e o r y

ratio,

results

d i d

p e r s o n a l

m e a n

o t h e r

e v e n

S k i n n e r

his

a p p e a r e d

a n d

flood

s t a r t e d

statistical B u t

A

his

F.

a p p l i c a t i o n s

e d u c a t i o n o f

B.

B a r t l e t t

t h e

v a r i a n c e

s e v e n t e e n

p s y c h o l o g y .

curricula

in

i n t e r e s t

institutionalization

in

i g n o r a n c e

p s y c h o l o g y

d e r i v e d

b y

in-

i n f e r e n c e .

o c c u r r e d

analysis

j o u r n a l s ,

K o h l e r

o f

b u t

w h i c h

c o m p a r i s o n .

critical

n o t

f r o m

c u r v e s ,

o f

d e s c r i p t i v e

e v e r y t h i n g

F r e d e r i c

r u l e t h e

w e r e

in

c o m p a r i n g

u s e d ,

o f

t h e

b y a

articles

n o n - s t a n d a r d i z e d

d e v e l o p m e n t ,

Sir

m e t h o d

c h a n g e

F i s h e r ' s

o f

a n d

a

E x p e r i m e n t a l

intellectual

statistical T h e

i n c l u d i n g

o r

e r r o r ,

also

r e p o r t

a n d

d r a w n ,

s p e c i f y i n g

i n f e r e n c e

p i e c e m e a l

i n f e r e n c e ,

c o n d i t i o n i n g , a

a

p r o c e d u r e s ,

f o r m a l

t h e o r y

is

is

r e a d e r ,

w e r e

a n d

mind

e y e b a l l i n g

p r o b a b l e

m e t h o d

d e s c r i p t i o n

b y

t h e

w i t h o u t t h e

the

i n f e r e n c e

d r a w n

w i t h

as

c h i - s q u a r e

o f

o v e r a l l

s u c h

n o

a r e

v a r i a n c e s

criteria

issues

b u t

b a r g a i n i n g

t h e

P e a r s o n ' s

detail,

h y p o t h e s e s

w i t h

f o r m a l

i n

of

t h e

t h e o r y

v a r i a n c e c a m e

i n d i s p e n s a b l e

t o

o f

n u l l

u s i n g

i n s t r u m e n t ?

h y p o t h e s i s

a g r i c u l t u r a l

p s y c h o l o g y

f r o m

testing. e x a m p l e s

a g r i c u l t u r e .

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Statistics

B y

t h e

m i d - 1 9 5 0 s ,

c l e a n s e d soil

o f

t h e

fertility,

special

t h e

in

all

gists, a n d

a

a g e n e r a l

f r o m

( f o r

S t a t e

at A l l

visited

F i s h e r

t w o

o f

b o o k s

I o w a

r e s e a r c h e r s . o f

F i s h e r ' s

l a t t e r

t h e

A l l e n

G r a d u a t e a n c e a

g r a d u a t e

c o u r s e s

o n

plicated, k n o w n ,

t h e

N e y m a n

h a d

r e j e c t e d

m e t h o d

o f

t w e e n m e n t a l H o w

t w o

1 9 5 1

t h e o r y

a n d

o f

o f

P e a r s o n

w h i c h

u n i f y

a n d

h a d

e n g a g e d

h y p o t h e s i s a n d

a n d

t e s t i n g

w h e r e

year.

t h e y as

a

a n d

U n i v e r s i t y e d u c a t i o n a l

d e v e l o p m e n t at

S t a n f o r d H o t e l l i n g ,

L. G .

T h r o u g h H u m p h r e y s ,

B y

a n d

w h e r e

1 9 5 0 ,

T w e n e y ,

statisticians a n d

E g o n

o f

it

W a r .

A s

h a l f h a d

f o r t h

w a s

u n d e r s t o o d w a s

his

o f

t h e

o f f e r e d p r o g r a m

b e c a m e

s h o w n

c o n t r o v e r s y

set

b e c a m e

P e a r s o n

n u l l

vari-

1 9 8 0 ) .

s o o n S.

d i s p r o v i n g

p o w e r

analysis

u n i v e r s i t i e s

a h e a t e d

o f

in

statistics a g r a d u a t e

W o r l d

p r o g r a m

t h e

f r o m

at S t a n f o r d ,

( R u c c i

in

for

U n i t e d

S t a t e

S t a n f o r d .

t r a i n i n g

s a m e

m a d e

S e c o n d

P a l m e r

S n e d e c o r

M c N e m a r ,

at

later

I o w a

w h e n

f o r

t r a i n i n g

at

t h e

I o w a

f r o m

it

statistical

a n d

statistical

research

N e y m a n

i n f e r e n c e

t h e

A m e r i c a n

h a d

a n d

statistician

Q u i n n

1 9 3 5

F i s h e r i a n

J e r z y t h e

in

m a k e

p s y c h o l o -

t w o

at

p s y -

statistical

S n e d e c o r

w a s

O f

o t h e r s .

t h e

1 9 5 4

t h e

F i s h e r ' s

h y p o t h e s e s ,

in

o f

W .

l a t t e r

pigs,

p s y c h o l o -

F i s h e r ' s

t e x t b o o k

r e c e i v e d in

t o

o n

L i n d q u i s t

o f

m a n y

l e a d i n g

a n d

after

i n d u c t i v e

in

a n d

s t r e a m

t h e

p r o f e s s o r field

t o o k

Fisher's ideas in

F i s h e r

F.

It

U n i v e r s i t y ,

statistical

C o l l e g e , a n d

t r i u m p h

p a r t i c u l a r

his

t h e

r e q u i r e m e n t

G .

himself,

H o t e l l i n g .

a n d

m e t h o d s ,

p u s h e d

E.

associate

in

1 9 8 0 ) .

i n v o l v e d

p s y c h o l o g y

State

3.4, N e y m a n

b e h a v i o r ,

in

articles

o f

p o t a t o e s .

u n s o p h i s t i c a t e d

statistical

r e c e i v e d

G r a n t ,

b e t w e e n

as in

t h r o u g h

b e c a m e

D a v i d

t h e

o f

c o u l d

s t e a d y

a g r i c u l t u r a l

1 9 3 7 ) ,

ideas

F i s h e r i a n

H o w e v e r ,

a

w h e n

t h e

b e c a m e

d e p a r t m e n t s

r e q u i r e m e n t

t h a t

t h e o r y

w e i g h t

m e s s a g e

C o l u m b i a

F i s h e r

b y

a n

p r o g r a m

at

i n f l u e n t i a l

s t u d e n t s

p s y c h o l o g y

o n ,

p u b l i s h

S n e d e c o r

w a s

in 1 9 3 4 at I o w a

d o c t r i n e

T w e n e y ,

1 9 3 4 ,

i n s t a n c e ,

E d w a r d s ,

t o

b y

I n f l u e n c e d

Fisher's

g r o w t h

F i s h e r i a n

M i n n e s o t a

t a u g h t

m a i n l y

w h e n

t h e

t h e

t h e

( 1 9 3 5 ) .

m a t h e m a t i c a l l y

a n d

o f

P s y c h o l o g i s t s

f o r

t h e

as

Experiments

1 9 3 0 s

H o t e l l i n g

his

U n i v e r s i t y ,

M c N e m a r ,

R u c c i

( S n e d e c o r ,

i d e a s

g r a s p

b e g a n

E n g l a n d ,

w r o t e

of

s u c h

v a r i o u s e d u c a t i o n a l j o u r n a l s , Psychometrika,

w e r e

v i s i t i n g p r o f e s s o r .

Design

o n

p r e s e n t e d

o n ,

U n i v e r s i t y

in

w h i c h

largely

see

t h r e e

m a n u r e

late

207

t h e

H a r o l d

t h e

States.

his

t h e

Bulletin,

details

o f

t o

mind

e x a m p l e s

m e t h o d o l o g i c a l

F r o m

1 9 4 0

C o l l e g e ,

J o h n s o n

y e a r s

the

available

a g r i c u l t u r a l

F i s h e r ' s

f e w

d e l u g e d

w e r e

effect

w a s

Psychological

ideas

o f

t h e

fields.

t e x t b o o k s

t h e

a n d

o n l y

basis f o r

gists

s m e l l

i n f l u e n c e

c h o l o g i s t s

b o o k s

of

c o m -

b e c a m e

i n

s e c t i o n

w i t h

Fisher.

h y p o t h e s e s

i d e a as

i n t r o d u c e d

o f a

as

i n d u c t i v e

d e c i s i o n as

a

t h e

b e -

f u n d a -

c o n c e p t . c o u l d

t h e

t e x t b o o k

w r i t e r s

a n d

t h e

t e a c h e r s

o f

t h e

n e w

c u r r i c u l a

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208

Statistics

cope

w i t h

the

agreement, w h o

in

chology

a n d

plicated

to a n d

teach

sampling,

vals

a n d

N e y m a n

c o m p e t i n g into

b u y

Pearson's

theory. T h e s o m e

hybrid

w o u l d

hypothesis N e y m a n as

the

with

a n d

Fisher's,

ideas

a n d the

s t e m m e d

hybrid

statistics

as if t h e r e

to

sell

neither

a b o u t

(although

T h e

o f

type-I

so

on.

t e x t b o o k s

errors

taught,

Fisher,

the

f r o m

one

type

the in

be

texts sure,

r u n

alter-

eager

n o w

to

taught

a d d e d this

a n d

to

null

context),

o f

significance

b e c a m e

m i s h m a s h e d

that

a n d

as if it w e r e T h e r e

for

a

O f

N e y m a n

in

level

as

3.4.

w e r e

b e c a m e

N e y m a n

of statistics.

the existence o f a d e e p controversy, m u c h

section

the time

indicated

anonymously,

p r e s e n t e d

controversial

the

not

inter-

fuse

to

l o n g

it w a s

others

was presented only

in

text

ran-

to

d e t e r m i n e d

o f

o f

still less

n o t

interpretation

significance

Fisher's,

error

be

h o w e v e r ,

to

type-II

it c o u l d

c o m -

particular

n o

statistical

nor,

t o o

p o w e r ,

psychologists

T h e

Fisher

1956)

Psy-

declared

textbooks,

described

a n d

in

simply

desired

dis-

Guilford,

Statistics

almost

tried

as

inference.

approved.

existed

the

alternative

P.

specifying

statements

theory,

eager

w h i c h

f r o m

tone? J.

t h e impossible. B u t it w a s n o t

Pearson's

p r o p o r t i o n

as a n

o f

achieve

mass o f texts

inductive

have

ideas

H o w e v e r ,

statistical

w e r e

o f

testing

W h a t e v e r

a n d

o f

statistics,

Pearson

to

on.

theory

d o i n g

f u n d a m e n t a l

third edition in

Pearson's

so

great

hybrid

m e t h o d

polemical

sophisticated

o f avoiding probability

statisticians

the

m o r e

advance

a n d

the

the m o s t widely read text)

a n d

sizes in

issues,

e d i t i o n o f h i s Fundamental

(p. 217). T h e

course, this m e a n t natives:

a n d

( e v e n as late as t h e

o u t c o m e s , a n d

first

N e y m a n

sample

mind

controversial

personal

the

o f p o w e r

d o m

the

(probably

to discuss

started

o f

bitter

Education

the concept

ideas

the

1942 published and

levels

subtlety

of the

w a s

s o m e

o f

Pearson. the

only

n o

the T h e

truth,

m e n t i o n

less o f t h e c o n t r o v e r s i a l

o f

issues,

n o r o f the existence o f alternative statistical theories. If the originators

o f

the ideas w e r e m e n t i o n e d

o f

Hays

(1963),

t h e n

Fisher's theory J.

N e y m a n

the

a t all i n a t e x t b o o k , as in t h e e x c e p t i o n a l case

reader

"was carried

a n d

E.

was

told

o n t o

the

S. P e a r s o n "

earlier

Fisher has linked the "inference

(p.

thing w h o

o f

cumulative

287).

But,

a n d

the

"high

state"

f r o m

is c r e d i t e d w i t h

o f

a n d

is

merely

skeleton.

so successful

to

imagine

w h a t

Fisher

f o u n d i n g

w a s

Pearson's concepts w e r e

testing to experimental

has b e e n

progress:

in the w o r k

design

revolution" was consequently a revolution in

e x p e r i m e n t e r s

different

Fisherian

significance

design. This revolution today's

story

to a high state o f d e v e l o p m e n t

n o t practiced in psychology; N e y m a n tacked

a

the

that had first

t h a t it is o f t e n

" e x p e r i m e n t " taught

(see

could

(3.3),

and

experimental difficult m e a n

3.2). W i l h e l m

experimental psychological

for

s o m e W u n d t , labor-

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Statistics

a t o r y

i n

1 8 7 9

s p e c t i o n

w i t h

1 9 8 7 b ) . h a d

in

r e c e n t

W u n d t ' s

n o t h i n g

a m o n g

t h e m

c h o l o g i s t s ;

d o

a n d

t h e

t h e

d i f f e r e n c e s

d e s i g n m e s h

w e l l

m e n t

d i d

w a s o f

h a v e

w i t h n o t

m o n o p o l y .

s u r v i v e

I n T h e

statistical

p r o g r a m

scientific b e e n

o f

d e d i c a t i n g

m e t h o d o l o g i s t s

c o u l d

h a p p e n ? w e r e

A s

t h e

this

o f

p r a c t i c e d in

r e p e t i t i o n , e x p e r i m e n t ,

b y

G e s t a l t

w h i c h

p s y -

i n d i v i d u a l d e s i g n ,

in

t h e

e n v i r o n m e n t ;

a n d

F.

n a t u r a l

c o n d i t i o n i n g .

his

T h u s ,

statistics,

m a n y

n o

o n e

o f

his

a n d

c o u l d

h e l p

in

S k i n n e r

b o o k s

" t o

this

ideas

d i d

o f

n o t

e x p e r i -

m o d e l

w o n

a

e x c l u d e

d e v i a n t

i g n o r i n g

F i s h e r ' s

h i m s e l f

t h e

b o o k

B .

F i s h e r ' s

statistics

F i s h e r ' s

s u c c e e d e d

analysis,

w h o s e

his

a n d

m o n o p o l y

e x a m p l e ,

A l t h o u g h

a l t e r n a t i v e

r e v o l u t i o n ,

w e

i n s t i t u t i o n a l i z a t i o n

h a v e

n e g l e c t

o f

a r g u e d

p r e s e n t a t i o n

t e c h n i q u e s .

T h i s

t r o v e r s i e s

a n d

e x c e p t i o n ,

b e e n

c o m m o n

in

b y

p r o b a b i l i t y t h a t

t h e

fidence

( 1 9 8 4 ,

statisticians

w o u l d

t h a t

d i d

all t h e s e t a t e d

b y

p . a n d

n e v e r

h a v e

H o g b e n ,

q u e s t i o n s . similar

K a h n e m a n ,

is t r u e r e s u l t

1 9 5 7 ;

i n m a k i n g

A n d ,

a n d

l a y m e n

false,

M o r r i s o n t h e

level

a n d

m o r e

a n d

o f

a n d

(4)

(see

i n

1 9 8 2 ;

r a t h e r

t h a n

t h e

in

o f

j o u r sig-

(2)

t h e

p r o b a b i l i t y

d e g r e e

1 9 7 0 ) . a n

s e e m s

o f t h e

level o f

t h e

s e e m

h a d

n o t i o n

o f

B r e d e n k a m p ,

t h i n k i n g

O a k e s ,

c o n -

effect,

t h e

H e n k e l ,

i n d u c t i v e

w h e r e

a u t h o r s ,

t h e

(3)

t h e

statistical

e d i t o r s

t h e

false,

a n d

f u n c t i o n

as t h a t

o f significance

w i s h f u l

e r r o r s

( E d d y ,

o r

is r e p e a t a b l e

i n t e r e s t i n g l y ,

c o m m o n s e n s e

o r

t r u e

o f

r u l e

w h i c h

a u t h o r s

m a g n i t u d e

is

t h e

i m p o r t a n t

beliefs, s u c h

t h e

h y p o t h e s e s

e x p e r i m e n t a l

a n

b o d y

a n d

w i t h

statistics

t h e o r i e s ,

p s y c h o l o g y ,

b e e n

illusions

t e x t b o o k

(1)

in

h y b r i d

i n s t i t u t i o n a l i z a t i o n

m o n o l i t h i c

a u t h o r s ,

p l a y e d

o f

a l t e r n a t i v e

a l w a y s o f

e r r o n e o u s

h y p o t h e s i s

its p a r t

e x p e r i m e n t e r s

f r a u g h t

d e t e r m i n e s n u l l

h a d

c i t a t i o n

W e l l - k n o w n

t h e

t h e

t h i n k i n g

w a s

a n d

e v e n t

a t t r a c t i v e

n u m e r o u s

itself

1 9 7 8 ;

T h e

a n o n y m o u s

t e c h n i q u e s

s t r a n g e

t h e

w h e r e

r e s u l t "

C a r v e r ,

a

a n d

a l t e r n a t i v e t h a t

is

t h e

t h e

a p p a r e n t l y

t h e o r i e s

f o r w a r d

nificance

a n

o f

issues

a l t e r n a t i v e

i n s t i t u t i o n a l i z a t i o n . nals p u t

o f

itself

p r a c t i c e .

"significant

a b o v e ,

c o n t r o v e r s i a l

a n o n y m o u s

a

i n t r o s p e c t i o n

r e p r e s e n t a t i v e

a n d

w i t h

( D a n z i g e r ,

Fisher's: i d e a s

i n t r o -

B r u n s w i k ' s

c o u r s e ,

d e s i g n

o f

still o t h e r

o p e r a n t

for

s y s t e m a t i c

as

o f

p h y s i o l o g y

e x p e r i m e n t ,

w i t h o u t

o f

m e t h o d

c o m p l e t e d . "

H o w

t h e

w e r e

i n f e r e n c e

S k i n n e r i a n s ,

o f

in

d e s i g n s .

t h e

as

e x p e r i m e n t ,

E g o n

u s e d

in

e l e m e n t s

c o m p a r a t i v e

p s y c h o l o g y ,

t h o u g h t

k e y

single-case

d i f f e r e n t

p h i l o s o p h i c a l

p r a c t i c e

T h e r e

s t u d i e d

b e e n

b e h a v i o r .

I l l )

b l o c k i n g .

209

e x p e r i m e n t

t h e

a n a l y z e d ;

m e t h o d

c o u l d

w i t h

G a l t o n i a n

j u d g m e n t

S k i n n e r ' s

o f

mind

t h e

e x p e r i m e n t a l

d e m o n s t r a t i v e

w e r e

the

c o m b i n e d

c o n c e p t i o n

t o

r a n d o m i z a t i o n ,

w h i c h

Leipzig,

of

c o n 1 9 7 2 ;

W i s h f u l a n s w e r

t o

t o

b e

facili-

r e a s o n i n g

o f

b o t h

1 9 8 6 ;

T v e r s k y

1 9 7 1 ) .

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a n d

210

Statistics

T h i s

d o e s

n o t

u n c o n t r o v e r s i a l w e n t

w i t h o u t

m e a n

h y b r i d

p r o t e s t .

h y p o t h e s i s

t e s t i n g

P e a r s o n i a h

e l e m e n t s ,

o f

belief)

a n d

w a r d s ,

L i n d m a n ,

1 9 7 0 ) .

O n e

s a m p l e t h e

o f

is

e n c e s

in

in

( I 9 6 0 ,

p .

t h e

t h e

n o

s u b j e c t s

p u t

[ s a m p l e

will

real

g e n e r a l l y

i n t e n t i o n

t o

g a t h e r

f a c t o r s

s e e m

statistics

in

c h o l o g y ' s

p r a c t i c a l

o f

tions, t h e

a n d

t a r g e t t h a t

c a t i o n

a n d for

t h e

( 1 9 8 7 a )

p s y c h o l o g i s t s fresh

f r o m

E m p h a s i s for

o f

o n

t h e

T h e

t h e

(e.g.

t h e

n o t

o f

t h e

n u l l

a

l a r g e

w e s t

States,

a c t u a l A s

r e j e c t e d , d a t a

E d -

H e n k e l ,

v e r s u s

U n i t e d

n u l l

d e g r e e s

a n d

m i n i m a l ) .

e n o u g h

its

differ-

N u n n a l l y

it

n u l l

t h e r e

o f a n d

u s u a l l y

is g a t h e r e d ,

t h e

o f

is t h e

h y p o t h e s i s

usually

w o u l d

in

itself

I n

statistics

o b s e r v a t i o n

o f

a p p l i e d

t o

t h e

t h a t

w a s

t o

i n t o

t h e

p r i m e Psychology

t h r o u g h

m a i n

fit

a r e a

t h e f o r

t h e i r

a p p l i -

a n d

g r o u p

n e e d s

e n t e r

s t r o n g e s t

t h e

e d u -

u s e d

k n o w l e d g e ,

this

for

t h e

v i e w .

A m e r i c a n p s y c h o l o g y

p r o b l e m s , r a t h e r

l a b o r a t o r y

r e s i s t a n c e

b y a n d

c o n q u e r e d

e x p e r i m e n t a l

a u t h o r i t y

o f

d e c i s i o n s .

w e r e

s u p p o r t

p r a c t i c a l

1 9 4 2

o f

t h e i r

m e t h o d s

w h e r e

t o

q u e s -

fields

n o t

c h a r a c t e r i s t i c

o r i e n t e d t h e n

a p p l i e d

A m e r i c a ,

o b s e r v a t i o n s

m o r e

p s y -

e d u c a t i o n a l

m e t h o d s

o f

n e w

t h a n

t h e

in

n e w

r a t h e r

n o t

t h e

o f

m e c h a n i z a t i o n

t e c h n i q u e s

r e l e v a n c e t h e

t h e

w e r e

c r i t e r i o n

t h e

d e m o n s t r a t e

ofEducational

s e e m e d

T w o

w a s

t h a t

f r o m

m e t h o d s

G e r m a n y ,

c o u l d is

d r e a m

o b j e c t i v e

p h i l o s o p h i c a l s y s t e m

t h e

p r o v i d e d

c l a s s r o o m ,

r e l e v a n c e

t o

w a y

a n d

practical

t h e

d r i v e

F i s h e r i a n

e v i d e n c e

t h e in

a n

i n s t i t u t i o n a l i z a t i o n

t h e

t h e Journal

v a r i a n c e

exactly:

t h e

E x p e r i m e n t e r s

r a t h e r

k n o w l e d g e

for

early

E d u c a t i o n

p s y c h o l o g y .

e d u c a t i o n a l

s e c o n d

m a d e

e x p e r i m e n t e r s .

practical

e x p e r i m e n t a t i o n ,

is

o f

d i v i d e d

east

e x p e r i m e n t s ,

s e c o n d ,

i n c r e a s e

p r o v i d e s

success

set

o f

r e j e c t i o n

first,

w e r e

it w a s

analysis

t h e

a n d tests

1 9 8 0 ) .

p r o v e

G e r m a n

t r a d i t i o n a l l y w h e r e

t o

t h a t

l a b o r a t o r i e s

t h a n

a n d

a d m i n i s t r a t o r s

D a n z i g e r

If

I f

crucial

e x p e r i m e n t e r .

p s y c h o l o g i c a l u s i n g

b e e n

statistics

l a r g e s t

T w e n e y ,

c o m p a r i s o n s c a t i o n a l

h a v e

p s y c h o l o g y :

t h e

1 9 7 9 ) ,

e v i d e n c e d

( R u c c i

t o

i n f e r e n t i a l

( L o v i e ,

rejected.

r e l e v a n c e ,

o f

small.

as

as

N e y m a n -

criticism

( 1 9 6 6 )

w e r e

h y p o t h e s i s

t o o

( i n s t e a d

( a l t h o u g h

sizes,

p s y c h o l o g i c a l

S i g n i f i c a n c e

l a b o r a t o r y

rest

a n d

a p p l i c a t i o n s

criteria

t h e

s u c h

M o r r i s o n

B a k a n

i n f e r e n c e

d a t a . "

A m e r i c a n

k n o w l e d g e .

in

n u l l is

b e

effect

h y b r i d ,

o f s h a r p

typical

d i f f e r e n c e s

t h e

t h e

in

a p p a r e n t l y

scientific

t h e

1 9 7 8 ;

a r b i t r a r y

v e r s u s

o f

a n

calculations,

t a r g e t s

t h a t

o f

o f

d e c i s i o n s

i n s t a n c e ,

M a i n e

non

p o w e r

M e e h l ,

w a s

s u c h

size]

qua

e l e m e n t s

w e r e

F o r

b y

" I f

sine

o f

1 9 6 3 ;

significant

it:

mind

r e j e c t / a c c e p t

criticism

w r o n g .

cases

N

n e e d

T w o

as

a n d

t h e

n e g l e c t

m e a s u r e m e n t s ,

6 4 3 )

h y p o t h e s i s w e r e

t h e

S a v a g e ,

R i v e r ,

all

t h e

b e c a u s e

b e

a l w a y s

M i s s i s s i p p i

as

F i s h e r i a n

s u c h

a n d

the

i n s t i t u t i o n a l i z a t i o n

c o n s i d e r a t i o n s ,

6 0 , 0 0 0

o b t a i n e d

B o t h

d a m a g i n g

h y p o t h e s i s

t h e

statistics

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c o s t

t h a t

of

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t h e

Statistics

i n s t i t u t i o n a l i z a t i o n fields,

b u t

F r e d e r i c i n g

f r o m

t h e i r

tics

b e

c o u l d

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tics o n e o l d

in

a

a p p l i e d .

c o u l d

o f

n o t

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fact

t h e y

a s s i g n

t o

b y

s t r o n g l y

d e c i d i n g " e v e r y c h a n c e

o f

u n d e r s t o o d

as

i n f e r e n t i a l s o l u t i o n

t o

t h e

a t

least,

1 9 5 5 ,

p .

7 4 ) . T h e

a c o m p l e t e l y m e r e

t o o l ,

s e r v i c e t o

f o r

t h r e a t e n i n g least,

o l o g i c a l

t h e

level

6 . 4

u n s e a t e d

d e c a d e s '

a r o u n d

gists

r e v e r t e d

n o t

t o

t h e

n o w

o f

b e

t o o l d

t h e

b y

t o p i c

s e e m e d in

in

o v e r t h e o f

v o c a b u l a r y

a

A m e r i c a n

earlier

w i t h

t h e

T H E O R I E S

c o g n i t i v e t h e

o n

G e r m a n

v a g u e

t e r m s

f o r t h a t

easily

a b e

t h r o u g h

g i v e s

a

f o r m a l

a n d

c o m -

(Fisher,

k n o w l e d g e

b y

a reality. A s

t e s t i n g

in

a

t h e

s e e m e d

e l i m i n a t e d

p e r s o n a l

i n f e r e n c e s

w i t h o u t

1 9 8 7 a ) . at

level

t h e

o f

O F

p s y c h o l o g y ,

r e v o l u t i o n .

t h e

facts

p s y c h o l o g y

p s y c h o l o g y

c o n s e n s u s

is

s e e m e d

o n l y

n e w

( G i g e r e n z e r ,

u n i f i e d

T O

c o u l d

b e c o m e

i n d u c t i v e

light

b e l i e v e d

p r o c e s s e s "

t h a t

a

t h e

satisfying

at

as

c l a i m e d

S i g n i f i c a n c e t h e o r y

t o o k

d i s c o v e r

g i v e

is

failed

i n d i s p e n s a b l e

c o m e s

"as

h a v e

t h e m

c o n t r a s t ,

t o

e x p e r i m e n t a l

objectivity.

o r

s c i e n c e

a r r i v e s t o

o f

w h o

d e d u c t i v e

w h o

d e t e r m i n i s m

T O O L S

I 9 6 0

o f

p r o b a b i l i t y

o f

is

statis-

W h e t h e r

16),

statistical

i n f e r e n c e

u s e d

all

o r d e r (p.

o f

t h e

a h y p o t h e s i s

t h e o r i e s

k n o w l e d g e

t h a t

o b j e c t i v i t y

a b s e n c e

in

p s y -

w a s

s e r i o u s l y

( 1 9 3 5 ) ,

o f

statis-

t h o s e

scientists

statistics

o n l y

scientist

a n d

scientists, i n

t h a t

t r a d i t i o n a l l y

ideal, n a m e l y

r e i g n

Social

o f

m e a n s

for

n e v e r

s u c h

h y p o t h e s i s "

i n s t i t u t i o n a l i z a t i o n t h e

t o

b y

t e s t i n g .

p h y s i c i s t s

scientific

t h a t

social

a n d

statistics.

c e r t a i n t y

F i s h e r

c l a i m e d

p r e v a i l i n g

in

-

scientific

t h e

o f

h y p o t h e s i s

exist

p r o c e d u r e

c o u l d

F R O M

f o u r

o f

i n f l u e n c e ,

Sir

t e a c h -

3 2 8 )

m e t h o d s

i n f e r e n t i a l

m a n y

i d e a

n u l l t h a t

p r o m i s e d

t h e

t h e

said

a p p l i c a t i o n

a n d

n u l l

testing.

o f

m e c h a n i z e d

a n

w h i c h

w a v e s

t o

g i v e n

d r e a m

statistics

j u d g m e n t

A f t e r

t h a t

g r e a t

p r o p o s e d ,

p r o b a b i l i t i e s

t h e

o f a t r a d i t i o n a l

a l l o w

n o t

as

b e e n

t o

p r o b l e m

p l e t e ,

a d e g r e e

h a s

u s e s

F i s h e r

1 9 6 3 , p .

t h e

a n d

o n l y

i d e a

m a y

statistics.

o f

o f

T h e

o f

said

w h i c h

a p p l i e d

S k i n n e r

k n o w l e d g e .

A n d

h a v i n g

t o

o t h e r w i s e

h y p o t h e s e s .

d i s p r o v i n g

F.

t h e

i n s t i t u t i o n a l i z a t i o n

if e v e r

b e

B .

f r o m

t h e

significance

e x p e r i m e n t

n o t

s u p p o r t e d

n u m e r i c a l

b e t w e e n

c a m e

( S k i n n e r ,

d a t a

o n s l a u g h t

d e r i v e

s u s c e p t i b l e

211

c o n t e m p o r a r i e s

m e t h o d "

Physics,

o r

f a m o u s

yield

s o l u t i o n

p a r t i c l e s

t h e o r y

b e

a

r a r e l y

o f

c o u l d

o f

mind

l a b o r a t o r y .

t h e i r

t h e

t h a t

c o n t e x t .

c o m p o s e d

" t r u e "

s t o p

m e c h a n i c a l l y

scientific in

t o

D e s p i t e

m e c h a n i z a t i o n

d r e a m .

less

scientific

f a c t o r

c o u l d

m o d e l ,

o f

e x p e r i m e n t s

s e c o n d

d r e a m

a n

lieu

t h e i r

the

statistics

e x p e r i m e n t a l

a c c u s e d

in

d e s i g n i n g

i n f e r e n t i a l

t h e

B a r tie tt

"statistics

o f

of

m e t h o d -

M I N D

b e h a v i o r i s m

p r o g r a m s , as

b u t

t h e o r y .

A m e r i c a n

s u c h

Last,

t h e

w a s

p s y c h o l o m i n d ,

b u t

a p p e r c e p t i o n ,

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Statistics

212

restructuring, o u t l o o k

for

insight.

a n e w

p r o c e s s e s . scientists

a n d

T h e

c o n c e p t u a l

the m a i n

t h e

c o g n i t i v e

r e v o l u t i o n .

t h e

m i n d

s t a n d i n g s o r y

a n

o f

a

T h e

m i n d

f r o m

t h e

t h u s

i n c o m i n g

criteria, a n d v i e w ) a n

o r

t o

b e

p r e s e n t

as

e x p e r i m e n t a l

w h e n

w e

e x p l a n a t i o n . t w o

d e t e c t

a n

d i f f e r e n c e ) since t w o

t h e

a n d

object,

are

w h e t h e r

n e r v o u s

s y s t e m

a m o u n t A r o u n d

w a s

a

"signal")

W a l d

1 9 5 5 ,

G r e e n i n g

a n d

t h e o n l y

if

S w e t s ,

i.e.

type-I

a n d

b e e n

the o u r

o f

u n d e r s e n -

1 9 8 7 ) . s a m p l e s

t o

set

d e c i s i o n

t o

t h e

m o d e r n

object,

f r o m

m a d e

v i e w

r a n d o m

intuitive

theories,

that

M u r r a y ,

( a c c o r d i n g

is a n

a n d

e l e m e n t a r y

probabilities,

an

m e n t a l

C o m p u t e r s

a n d

p e r c e i v e

t h e

b e h a v i o r a l

c h a n g e d

f r o m

o f

t h e

w i t h

t o d r a w

this

m i n d

m e m o r i z e

statistician.

different

W e

fields

o f

false

t h e

m i n d

d i f f e r e n t

e x c i t a t i o n

f r o m

type-II

p o i n t

just

set

after a n d

error,

effect

o n e

b e e n

b e e n

the

w h e t h e r

a d d e d S u c h

t o

w i n e ,

d e t e c t i o n

d e r i v e d

o b j e c t

has

d i s c r i m i n a t i o n

e x c e e d s

that

a

s t u d i e d

d e t e c t i n g

m e t a p h o r

a n d

v i e w

a n d

o f

f r o m o n

o u r

b e t w e e n

a n o t h e r

m i n d

b y

w e i g h t i n g o f

r e s p e c t i v e l y

t h e

c o s t s

w e l l

as

t h e o r y

( n o w

a n d

called

S w e t s ,

t h e

t w o

respectively. o f

w h i c h

signal

N e y m a n - P e a r

calculates

"noise,"

o f

this

o b j e c t

( T a n n e r

signals, (as

essence,

t h e

t h r e s h o l d s

t h e o r y

is a n

o f

first

a n d

I n

t h e r e

h y p o t h e s e s

n o i s e "

m i s s e s

"the

t h e o r y " ) .

a statistician

is, t h e

differential

called

w h e t h e r

t w o

"signal p l u s

t h e

o f a b s o l u t e

o f

like

T h a t

has

a

( d e t e c t i n g

threshold.

d e t e c t i o n

b e t w e e n

alarms

if

threshold,

are

b r i g h t n e s s e s .

u s i n g

o n l y

" d e c i d e s "

noise,

s u g a r

o b j e c t s

that h a v e

E x a m p l e s

absolute

a

t w o

p r o c e s s e s

w h e t h e r

o c c u r s

"signal

is

b e t w e e n

a differential

b y

f o r

d i s c r i m i n a t i o n

e x p l a i n e d

a n

1 9 6 6 ) .

criterion

errors,

h a v e

t h a n

d e c i d e s

d i s t r i b u t i o n s

d e c i s i o n

alia,

w e

c o g n i t i v e

t h e p s y c h o p h y s i c s

(or

that

s c h o o l

that

a n d

w e i g h t ,

e x c e e d s

g r e a t e r

o r

-

d i s c r i m i n a t e

d e t e c t i o n

r e v o l u t i o n i z e d

p o s t u l a t e s

o n l y

f u n c t i o n s

inter

p s y c h o p h y s i c s .

stars

o c c u r s

detectability"

t o

s a m e

l o n g

( 1 8 1 6 ) :

a n

o f

t w o

h a v e

o b j e c t s

h e r e

that

influential

e l e m e n t a r y

t h e

H e r b a r t

t w o

a n d

t w o

h a v e

p r o c e s s e s

o f

m i n d .

a n a l o g y

testing:

T h e

t h e

nature

o n

p s y c h o l o g y .

b e g i n n i n g

coins

o f

calculate

say

t o o l s

( G i g e r e n z e r

u n d e r s t o o d , t o

the

w a s

theoretical vocabulary

j u d g m e n t

D e t e c t i o n

T o

n e w

a n

r e v o l u t i o n

u n d e r s t a n d

c o n c e r n e d

h y p o t h e s i s

e x a m p l e s

t o

p r o c e s s e s

the

i n f o r m a t i o n ,

a n

c o g n i t i v e

c o g n i t i v e

social

h a p p e n s find

t h e

are

o f

mind

p r e s t i g i o u s

statistician,

t o p e r f o r m

is w h a t

e v e n t ,

will

t o

c a m e

as

W e

r a n g e

d i s c r i m i n a t i o n

a n d

sources o f

intuitive

b r o a d

rising

l a n g u a g e

r e c o n s i d e r e d

statistics w e r e

as

T h e

i n d i s p e n s a b l e

w e r e

of the

t h e

t w o

c o r r e s p o n d

o t h e r

s o n 1 9 5 4 ;

s a m p l T h e n

a

p o s s i b l e t o

t h e

c o n s i d e r a t i o n s ,

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Statistics

s u c h

as

the

prior

r e p r e s e n t a t i o n t h e

a n s w e r

p r o b a b i l i t y

o f

a

"yes,

signal

t h e r e

of the

o f

signals).

(noise)

is

a

mind

is

signal"

Finally,

g r e a t e r is

213

if

t h e

t h a n

g i v e n ;

v a l u e

t h e

o f

the

d e c i s i o n

o t h e r w i s e

" n o ,

i n n e r

criterion,

there

is

n o

signal." T h e

m i n d

w a s

called

" N e y m a n - P e a r s o n t h e

hit

rate

rate

(i.e.

(i.e.

t h e

p r o c e s s i n g

w a s

(false

T h e

in

r e v i s i o n

in

the p o w e r

criterion)

f r o m

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relationships

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subjective, o n

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a

m a n i p u l a t e d ?

research, h a d

data

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e x p e r i m e n t s :

individual),

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k i n d

d e p e n d i n g

q u e s t i o n

alarms

n e w

b e c a m e

o b s e r v e r .

o f

m e c h a n i s m s

p e r c e p t i o n

p e r c e p t u a l

distributions).

theory,

a v a l a n c h e

false

errors

k i n d

t h r e s h o l d

f r o m

a

m e a s u r e d

t h e o r y

d e t e c t i o n

testing"

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u n c o n -

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T h e

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far b e y o n d

s e t t i n g

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s e t t i n g

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e x p e r i m e n t a l l y

e x p e r i m e n t s ,

p r o c e s s e s

f r e e d

o r

a l a r m

for a g i v e n

t h e o r y

sensitivity,

in recall tasks in m e m o r y

fixed

false

c o n c e p t

c o n c e p t i o n

( t h e

Pearson's

signal

q u e s t i o n

a n d

T h u s ,

v i e w

1 9 6 5 ) ,

m a x i m i z i n g

a g i v e n

T h i s

q u e s t i o n s ,

trast, t h e traditional m e t h o d s , s u c h as t h e m e t h o d physics o r

for

P e a r s o n ' s

p r o c e s s e s

t h e

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signal)

N e y m a n - P e a r s o n - W a l d

rise

this

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a

d e c i s i o n g o a l o f

as a statistician w e n t

c o n c e p t ,

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a n s w e r the

m i n d

g e n e r a t e d

m e a n s

g a v e

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a

( T a n n e r ,

o f a test is m a x i m i z e d

n o n - s e n s o r y

p r o c e s s e s

that

g e n e r a t e d t h e

it

t h e

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c o s t - b e n e f i t

e m e r g e d

t o

t h e in

t h e

o f

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s e n s o r y p r o c e s s e s

b e t w e e n

a n d

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t h e

s e p a r a t e d

part

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(hit rate)

t h r e s h o l d

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jective

d e t e c t i o n

d e t e c t o r "

rate).

l a n g u a g e , t h e

if it a d o p t s

" d e t e c t i o n "

a n a l o g y

p r o c e s s e s

e n c e

c o r r e c t

m e t a p h o r

o f

a n a l o g y

t h e

a l a r m

n e w

c h a n g e

o b s e r v e r , "

e r r o n e o u s

tests," w h e r e error

a " N e y m a n - P e a r s o n

relations

psychology.

b e t w e e n

e v e n t s

r e a s o n i n g

h a d

b e e n

s t u d i e d

Psychologists that

p r o d u c e d

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analyzed

I 9 6 0

the

p h e n o m e n a l

u n d e r

temporalcausality

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Statistics

214

( M i c h o t t e , r o c k e t e d

[ 1 9 4 6 ]

w h e n

a c c o u n t

o f

1 9 6 3 ,

a c a u s e

n a m e l y

p e r f o r m i n g

F o r

illustration,

jects t h e

in

a

a r t

P a u l h a s

a l m o s t

i n g ) :

t h e

( t i m e ) ?

F i s h e r i a n

m i n d

variables,

b e h a v i o r .

K e l l e y

p o s s i b l e

" p e r s o n " c u l a t e

a

b e c a m e c h o l o g y ,

a n d

t h e

A N O V A - m i n d D a n i e l ,

for

o f

fastest

t h e

a n d

v a r i a n c e

e x p a n d i n g

t h e

1 9 7 0 s

A

C A S E

e x p e r i m e n t a l

W u r z b u r g

s c h o o l

t h e o r y .

T h e

c e s s o r s

o f

s a m e

t h e

e.g.

t o

m o d e l

a r e a

1 9 8 0 s

i n

o f

a r e

at

b y

it.

p r o v i d e t h e

w i t h

t h e

o f

o r

t h e

t h e

t h e

i n t u i i n d e -

o b s e r v e d

for

is

e a c h

h i g h

t o

o f f o r

s h o u l d

cal-

P a u l .

causal

e m p i r i c a l

p a i n t -

t h r e e

m i n d

c a u s e

w h a t

t h e

( e n t i t y ) ,

o f

P a u l

a s k e d

a t t r i b u t i o n

e x p e r i m e n t a l

w e l l

sees

( M c A r t h u r ,

variability

t h e

s u b -

past,

b y

p a i n t i n g

a t t r i b u t e

t h e

h e

t h e

tests a n u l l h y p o t h e s i s

r e s e a r c h

S T U D Y : U

T h e

t o

s t u d y in

o f

b e

o r

said

p e r c e i v e

t o

D

E

p e r c e i v e

t h e

stick

R

social

r e s e a r c h

d o c u m e n t e d

p s y -

o n

t h e

( F i s c h

a n d

in

t h e

t h e

a r e

n e w l y i n g

t h a t

u s e d

1 9 2 0 s . o f

i n

s a w

t h e

r e l a t i o n s

i m m e d i a t e as

r e l a t i o n s

a r o u n d

a n

t o

w i t h

s o l v e

i n s t r u m e n t

t h e

p r o b a b i l i t y

e x p e r i m e n t s ,

f u n c t i o n a l as

1 9 0 0

t h i n k i n g

f u n c t i o n a l

K o h l e r ' s

in

m e n t i o n e d

s c h o o l ,

T h e y

t h e

s t a r t e d

n o r

G e s t a l t

f o u n d

T O

p r o b a b i l i t i e s

n e i t h e r o f

T H I N K I N G

U N C E R T A I N T Y

t h i n k i n g

r e o r g a n i z a t i o n

classical e x a m p l e s h a d

F R O M

w i t h o u t

G e r m a n y

m u s t

N

h u m a n

W i i r z b u r g e r s

r e s t r u c t u r i n g

a c h i m p a n z e e -

t o

w e r e

c o v a r i a t i o n

p r o p o r t i o n s

T h i n k i n g

p a r t s .

I n

d o ,

h y p o t h e s e s .

is e n t h r a l l e d

e n t h r a l l e d

t h e r e f o r e

m i n d

scientists

p a i n t i n g . "

t h e

( A N O V A )

a n d

J U D G M E N T S

sive

( b e i n g

t h e

p a i n t i n g

s u b j e c t s

e x a m p l e ,

a n d

n e w

1 9 8 2 ) .

6 . 5

T h e

T h e

" t i m e " ;

p e r s o n ,

a

c i r c u m s t a n c e s ,

m i n d

c o m p l e t e l y

n u l l

p a i n t i n g .

c o n s t r u c t e d

a n d

s k y -

p r e s e n t e d

b y

s a m e

t h e

a b o v e

d i n o s a u r i a n

i n

is

issue

t h a t

t e s t i n g

p a i n t i n g

( p e r s o n ) ,

a b o u t

t h e

" e n t i t y "

F - v a l u e

t h e

a

t h e

b e h a v i o r a l

a n d

t h e

1 1 0 ) .

P a u l

t h a t

I n

for

analysis

t h e

p .

entity,

as

o t h e r

b y

p r o b l e m

p e r s o n ,

w a y

sees

e v e r y

i n f o r m a t i o n

a s s u m e d

l o w

h i g h

K e l l e y ' s

T h e

causes.

a n d

w h o

in

p o s t u l a t e d

i n f o r m a t i o n

b e h a v i o r

w i t h

h e

is e n t h r a l l e d

e n t h r a l l e d

d o

I n t e r e s t

p r o p o s e d

v a r i a n c e

" P a u l

o b s e r v e d

t o

1 9 6 7

f o l l o w i n g

1 9 7 3 ,

1 9 5 8 ) .

s a m e

o f

a l m o s t

K e l l e y ,

c a u s e

c i r c u m s t a n c e s

t h e

b e e n

t h e

t h e

a n y o n e b y

mind

e s s e n c e ,

analysis t h e

H a r d l y

in

c a u s e d

p e n d e n t

a n

in

I n in

e x p e r i m e n t :

a l w a y s

p r o b a b l y

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effect

e n t h r a l l e d

q u o t e d

H a s

a n

c o n s i d e r

typical

also

1 9 7 2 ,

tive

t o

m u s e u m .

is

H .

the

H e i d e r ,

a t t r i b u t i o n .

a t t r i b u t e s b y

1 9 5 2 ;

H a r o l d

causal

of

t o

a

a

s u c -

s u c c e s b e t w e e n

in

w h i c h

p r o b l e m r e a c h

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t h e

Statistics

fruit

h a n g i n g

c l i m b ,

stick

K a r l

h i g h

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t o

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p h e n o m e n o n n e x t

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e q u i l i b r i u m .

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at

b y

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t h e

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t h e i n t o "the

i n t o

a n

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n u m b e r s . "

t u m o r ,

t o

until

settles

typical

p r i m e

s t o m a c h

t h e s e

are

Gestalt

"tips o v e r "

s y s t e m - u n d e r - s t r e s s

p r o b l e m s

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tences.

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in

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active

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[ 1 9 3 5 ]

b e

o f

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t h e r e

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until

d e -

1 9 4 5 ,

successively

a

exists

a p r i m e

t h e r e f o r e

p r o d u c t

t o

s o l u t i o n

r e f o r m u l a t i o n s

r e p r e s e n t e d

t h e

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p r o b l e m

n u m b e r / *

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" T a k e

a n

in

u s

o r

t h e

as

o f

a

a

is

m i g h t

greater

n u m b e r ,

be:

o n e , "

I m u s t

c o n s t r u c t

a

p r o d u c t , "

all p r i m e

o n e

try

n u m b e r

a n d

finally

n u m b e r s

read:

f r o m

p o i n t

different

t h e

t h e

t h e

rays

1

t h e t o

t h e

t h r e e

intensity b e

tissue

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m a d e

it

t h e

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its

differed t w o

the

b e i n g

passive

h a d as

t h e

D u n c k e r

w o u l d

f r o m

t i m e s t h e

last

injuring

w h i c h

for

c o n t e x t u a l

d e s t r o y

rays, t h e

w h i c h

p r e s e r v e d

w h i c h

t o o ,

in

e x p e r i m e n t s

instance,

t h u s

tissue,

for

o t h e r

in

f r o m

h e a l t h y

t w o

case

w o u l d

e m p h a s i z e s

his

versions,

passive rays

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objects

is d e c i s i v e

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t h o u g h t .

o f

decisive

f r o m

g i v e n ,

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s h o w e d

w i t h

o f

" T h e

is

c o n c l u d e d

t h e

p r e v e n t

b e t w e e n

historical

t o

-

l a y o u t

t h e p r o b l e m

p r o b l e m

t w o

p r o t e c t

v e r s i o n s

o f

e x a m p l e

in

p h r a s i n g

dealt

t h e

f l o w

w a s :

o n e

active

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t h e

v e r s i o n

c o u l d

passive

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particular

relations

c o n t e x t

active

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c o u l d

their

specific

o n

t h e

D u n c k e r

P r o b l e m

f r o m

that

w o r d s ,

t h e

i m p a c t

passive

active

tell

p h r a s i n g

T u m o r

H o w

m a j o r

l a w s

"layout"

c o m p a r i s o n

t h e

original

e x i s t e n c e b y

o t h e r

t h e

rays?" T h e

tissue.

a c c o r d i n g

p r i m e

restructurings.

H o w

T h e

d e s t r o y e d .

in

active

t o o .

t h e

c a n n o t

s o l u t i o n

c h a n g e

T h e

tissue,

t h e

c h a n g e

all h a d

in

p r o v e

f o l l o w e d

t h e

a

p r e s e n t e d

a n y

see, t h e

o f

m e a n s ,

n u m b e r

for

G e s t a l t

c h a n g e

factors

p r i m e

w h i c h

field

m e a n i n g ) ,

T h e

a

1."

t h e

d i r e c t i o n

g i v e n

p

a d d

as

a

it,"

t h e

visual

t h e

t u m o r

that

" T o

t h a n

arriving

b y

i.e.

r e s t r u c t u r e

p r o v e

g r e a t e r

o n l y

elaborate

w h e r e

i n o p e r a b l e

a p r o b l e m

o r

c o n s t r u c t

that

m o s t

successive

infinite

tissue

s u c h

F o r

f o l l o w e d

t h e

as

9).

m u s t

t o p

a n

t h e

h e a l t h y

attained.

t o

215

table

r e s t r u c t u r i n g

f o l l o w i n g

w i t h

r e f o r m u l a t e

"I

T h e s e

is a n

the

figures,

c o m p l e t e d , "

t h e r e

h i m

d e v e l o p e d

reversible

o r g a n i z a t i o n

that

the

c o n s i d e r e d

structuring.

" P r o v e

a n d

mind

h a n d .

D u n c k e r ,

t h e o r y

a b o v e ,

of the

s e n -

h e a l t h y h e a l t h y t h u s

b e

injured o n e

r e c e i v e d

the t h e

m a n y

subjects

n o n e

o f

rays. that

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t h e

216

Statistics

e x p e r i m e n t e r s s h o u l d t h e

b e

by

E v e n

t h e s e

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d o n e d

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o f

several

s t u d y

o r

m e n t a l

h a d

already

national

p r e e m i n e n c e

t h e

figures

N a z i

r e g i m e ,

reasons.

S o m e

Selz)

until

t h e

u t i o n ,

c h o l o g y .

m e r ,

t h e

t h e B u t

t h e y

f o r c e d

w h e n

it

o f

h u m a n

r e a p p e a r e d

statistics

a n d

i g n o r i n g

v a r i o u s

o t h e r

s o r y

o r

that at

o t h e r

T h e t o

m o r e t y p e tics

s u c h

inter-

m o s t

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in

o f

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A u s c h w i t z

D u n c k e r ) . c o g n i t i v e

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psy-

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t o p i c

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deal

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a b a n -

as its

o r

( K a r l

as a

shall

t h e

b o t h

t h e

p r o p o s e d

arose

after

o f

t h e

for-

r e a s o n i n g

o r

l i n g o

t h o u g h t

m i g h t

t h e

t i m e

s a m e

p e r c e p t i o n , m i g h t

statistics

t o

E d w a r d s s t u d y

" h u m a n

p r o b l e m s .

w i t h

statistics

t h e s e h a d

b e

t h e

v i e w

r e c o g n i t i o n

f r o m

i n v o l v e

as

statistical

statistical

that

s e n -

m e m o r y , calculation

statistical p e r s p e c t i v e s b e e n

calcu-

institutionalized

e m e r g e d as

t h e

in-

e x p e r i m e n t e r .

W a r d

first

at

1 9 8 7 ) . A l l

I n

e x p e r i m e n t e r ' s

T o g e t h e r

i n t u i t i v e

h u m a n

p r o c e s s e s

t h e

a r o u n d

u r n - a n d - b a l l s

o b v i o u s . h e

b e e n

o f

o f

a s

d i s c r i m i n a t i o n ,

s h o r t l y

f a s h i o n a b l e

as

c o m p l e t e l y

c o n -

" s u b v o c a l

1 9 3 0 s ,

lives

b y

r e a p p e a r

a p p r o a c h e s ,

be,

M u r r a y ,

t o o l

g r o u p

h a v e

s h o u l d

a n d

a n d

I 9 6 0 ,

d i s p e n s a b l e

n a t u r e

c o g n i t i v e

( G i g e r e n z e r a r o u n d

t h e

least,

d e t e c t i o n

a n d

e r o d e d

W e

just

t o

solving.

v i e w

lation,

w a s

a

their

t o

ran

t o

e m i g r a t i o n

c o m p u t e r s .

T h i n k i n g

T h e

lost

as a

G e r m a n y ,

a n d

o r

P r i m e

sufficient

1 9 5 0 s

w e r e J e w s ,

o t h e r s after

I n

b e

theory.

b e h a v i o r i s m

s c h o o l s

early

c o u l d

the

t h i n k i n g

1 9 2 0 s

G e s t a l t

t h i n k i n g

w i t h

t h e

retire

b e h a v i o r i s m

a n d

m o v e m e n t s

their w i v e s

t o

suicide

f o r e i g n

as

n o r

W a t s o n ' s

r e d u c e d

that

probability

necessary

1 9 4 0 s

t h i n k i n g

C o n s e q u e n t l y ,

s u c h

t e n d e n c i e s . "

a n d

o r

o f

p o s e d ,

B.

h u m a n

p r o b l e m s

laws

t h e

d u r i n g

K o h l e r ) ,

n a m e l y

p r o b l e m

o f

W u r z b u r g

c o m m i t t e d

in

a n d

r e s p o n s e

w a n i n g

b e c a u s e

s t u d y

d e c l i n e d

track

the

n e i t h e r

A m e r i c a , J.

o f

w a s

W o l f g a n g o r

w a s

o f

that

calculation.

w i t h

w e r e

c o n c e p t s ,

lost

w e r e

1 9 6 0 s ,

d i d

tools,

of

either

W e r t h e i m e r , ( O t t o

I n

" c o m p e t i t i o n

p s y c h o l o g y

k e y

p r o b l e m s

forces.

o f

s t u d i e d

application

t h i n k i n g

t h o u g h t

statistical

yet

calculation

p s y c h o l o g y

s e q u e n c e

o r

mind

s c h o o l s

o f

n o t

m a t h e m a t i c a l

P r o b l e m ,

T h i s

m a j o r

t e r m s

calculation

N u m b e r a

t w o

u n d e r s t o o d

n a t u r e

s o l v e d

in

of the

H a r o l d

that e x p e r i m e n t e r s

at

t h e

t h o u g h t

U n i v e r s i t y

p r o c e s s e s ,

i n f o r m a t i o n E d w a r d s ' t o o l

a n d

L i n d m a n

a n d

u s e B a y e s i a n

M i c h i g a n

w h i c h

p r o c e s s i n g , "

w o r k , t h e

o f

t h e

u s i n g

d o u b l e

subject's

t h e y

role

m e n t a l

L e o n a r d J.

h e

called

in

B a y e s i a n o f

statis-

p r o g r a m

S a v a g e ,

statistics, a n d

s e e m s

in

at t h e

is

1 9 6 3 , s a m e

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Statistics time investigated w h e t h e r as probabilities are

of the

mind

217

subjects learn f r o m

revised

by

Bayes'

experience in the s a m e

t h e r o e m .

T h e

first

part

g r a m , Bayesian statistics for e x p e r i m e n t e r s , w a s a c o m p l e t e e x p e r i m e n t e r s very

interested

F o r

the

mass

m e t a p h o r b e c a m e the

already h a d in

the

a m o s t

analogy

Bayesian-type

in

o f

following

Slovic,

analysis the

E d w a r d s '

day

and o n

that

they

find

the

a n d

believed limits o f

Phillips,

attack" terns

and o n

Bayesian

the

by a simpler

u p d a t e d

the

w o u l d

m i n d

o f

w e

h o w

a n d

by

n e w

a n d

s e e m e d

type o f p r o b l e m ,

central

the

n e w

in

their

o n

the

Lawrence

situation

Phillips

o f

to

be

w h i c h

than

t o o

a

1; f o r

c o m p l e x

was

b e c a m e

estimates

was

b o o k b a g - a n d - p o k e r - c h i p

their

p r o b l e m s .

H e r e

prior

the

a

than

"conser-

for

w e r e is

pat-

e x t e n t

s o o n

for

urns-and-balls p r o b l e m s . T h e s e

" e n e m y

(dot

the

this and o t h e r

a standard

a

observations.

lesser

a n d

to

L i n d m a n ,

w h i c h was d u b b e d

the probability

to m o r e

revise n e w

and

in o r d e r

situation

o f

to

his

like a Bayesian,

to

basis

probability

kind

o n

D .

1968; E d w a r d s ,

h a d

the

the

m e t a p h o r

R e p o r t i n g

c o m p l e x

subjects

(e.g.

focus

twelve possible observations

T h e

s u m s u p

shall

the

p h e n o m e n a

L. H a y s ,

fairly

still a

uncertainty

is a B a y e s i a n .

(Edwards,

at

generated.

a fairly c o m p l e x

hypotheses

the

are

constructed,

data

dictate, a p h e n o m e n o n

situation

the

statistician

f o u r possible h y p o t h e s e s , s u c h as

revised

tried-and-true as

a n d

p r o b l e m s

kind

original

in general added

c o m p l e x

years, the

four

F u r t h e r m o r e ,

hypotheses

the

n e e d

screen).

generally

Bayes' t h e o r e m

the

behavior

T h e

T h e

schools.

p r o m i n e n t

u n d e r

o u t

that William

shower,"

the

been

that stimulated

w e r e

thinking

j u d g m e n t

p r o b l e m s ,

they w o u l d

for

have never

the

statistics. B u t

to

that the m i n d processes information

probabilities

vatism."

n e w

declared

radar

p r o -

since

Bayesian

similar

shall w o r k

a n d

was w h e t h e r

" m e t e o r

subjects

o n

questions,

radar system w i t h

the

a

1982). T h e r e f o r e ,

W e

for,

1965).

c o m p u t e r i z e d

like

revision

statistical

research

questions,

a n d h e suggested

o f

these.

original hypothesis, he

w o r k s

flop,

statistical

statistics w a s

o f probability

Tversky,

l o o k e d

question

m i n d

various

o f that

thinking.

research

explanations

N e w

o f

psychology

present

transformed o f

b e t w e e n

research p r o g r a m ,

p r o b l e m s

the

the

K a h n e m a n ,

debates

reasoning

influential

c o m p u t e r

issue

raging

o f researchers, statistics w a s

that

beginning

the

their statistics. E x p e r i m e n t e r s

way

four

reasons, replaced following

n o w

often

prototypical

e x a m p l e : " T w o contains chips a n d

urns are 7 0 % 3 0 %

red

filled

w i t h

chips

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a n d

a large n u m b e r 3 0 %

blue.

e x p e r i m e n t e r

flips

o f p o k e r

T h e

second

a fair c o i n

chips. T h e contains

first 7 0 %

u r n blue

to select o n e o f

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the

2 1 8

Statistics

t w o

u r n s ,

s o

s u c c e s s i o n e i g h t

r e d

s e l e c t e d p.

t h e

o f

c h i p s

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W h a t

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e a c h

u r n

u r n . is

r e d

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.50.

S u p p o s e

y o u r

t h e

r e v i s e d

o n e ? "

H e

t h e n

d r a w s

s a m p l e

c o n t a i n s

p r o b a b i l i t y

( P e t e r s o n

a n d

a

t h a t

B e a c h ,

t h e

1 9 6 7 ,

32) T h i s

t y p e

c a u s e

(a)

b l u e )

a r e

o f

o n l y

p r o b l e m

t w o

as

p(HR)

is

p r e d o m i n a n t l y

r e d

o n e , p(HR

d a t a

D

( e i g h t

t h e

p r o b a b i l i t y

r e d

t h a t

t h e

a n d

D

a r e

d a t a ,

If

t h e

s i m p l e r

h y p o t h e s e s

c o n s i d e r e d

s y m m e t r i c a l .

is

(c)

p r i o r

b e

r a d a r - s c r e e n

t h e

( b )

is

t h e

b l u e )

o n l y

t h a t

t h e

p o s t e r i o r

h a s

o b s e r v e d

b e e n

i f HR

p r o b l e m s

t w o

c o m p o s i t i o n s

p r o b a b i l i t y

| D )

will

t h e

c o n s i d e r e d ,

a n d

f o u r

t h a n

e v e n t s

o f

t h e

o b s e r v e d ,

is t r u e ,

( r e d

u r n s

s e l e c t e d

p r o b a b i l i t y

u r n o f

B a y e s '

o r a r e

is

HR

a n d p ( D

t h e n

b e -

t h e after

| HR)

is

t h e o r e m

states

( H

P

T h e

\ D ) = p ( H

K

u n c o n d i t i o n a l

p ( D )

If y o u

=

t h i n k

p ( D

| Hs)p(H,)

t h a t

t h e

r e d

m a j o r i t y

s u b j e c t s

ability

f r o m

i n g

E d w a r d s

o f

I n t e r e s t 1 9 7 0

0 . 5 0

in

D a n i e l

r e v i s i o n

K a h n e m a n ,

cab

was

G r e e n

and

(i)

8 5 %

identified

n e w

as

k i n d

involved

in

a hit

A m o s

a n d

operate

in

t h e o r e m ,

m e n t a l

e x a m p l e

6 2 ) :

cabs

the

in

city.

are

G r e e n

court

Question: rather

T h e

in

W h a t than

8 0 %

the

o f

w h i c h

cases

is t h e p r o b a b i l i t y

is t h e

a g r e e

revises

w a s

t h e

p r e -

w i t h t h e

t h e

p r o b -

m a j o r

find-

a n d

that

p o s e d , r a t h e r

t h e

as

P r o b l e m

T w o

given

1 5 %

presented

w e r e erred

G r e e n ) in

2 0 %

a r o u n d

p r o b a b i l i t y

u r n s - a n d - b a l l s ( T v e r s k y

cab

the

are

w h e n

s a m e

t h a n

night.

are

and

q u i c k e n e d

companies,

following

Blue,

(ii)

o f

the cab involved

witness the

the

data:

A

witness

cabs

u n d e r

with a sample o f cabs the

a n d

m a d e

(half

correct

cases.

in the accident was

Blue

G r e e n ?

s t r u c t u r e

p o k e r - c h i p

o f

u r n

tested his ability t o identify

Blue

half

at

Y o u

of

identifications

t h e

y o u

r e v i s i o n

C a b

accident

the

city

t h e

visibility conditions. W h e n a n d

t h e n

t e s t i n g

p r o b l e m s is

run

t h e c a b as a B l u e cab. T h e

w e r e

t h a t

h o w e v e r ,

T v e r s k y

the appropriate w h i c h

f o l l o w s :

(6.2)

0 . 7 5 ,

c o n s e r v a t i v e

o f

a n d

p .

the

as

c o l l e a g u e s .

1 9 8 0 ,

Blue,

c a l c u l a t e d

p r o b a b i l i t y

a b o u t

B a y e s '

T h i s

b e

| HB)p(H*)

t h e

t o

" r e a l - w o r l d "

f a m o u s

the

of

his

K a h n e m a n

A

0 . 5 0

(6.1)

c a n

p ( D

raises

t e s t e d .

a n d

this

d a t a

0.97.

p ( D )

+

f r o m

t o

p r o b l e m s

p r o b l e m s .

A

o n e

) / p ( D )

R

p r o b a b i l i t y

d o m i n a n t l y o f

) p ( D \ H

R

o f

t h e

p r o b l e m s .

C a b

T w o

P r o b l e m k i n d s

o f

is

t h e

s a m e

i n f o r m a t i o n

as a r e

in

t h e

b o o k b a g - a n d -

p r e s e n t e d ,

t h e

p r i o r

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Statistics

probabilities/>(H), also

called

p o s t e r i o r v o l v e d w a s

t o

in

t h e

hit

c o n c l u d e d •prior

that

In

f r o m t h e

a n d

w a s

for

t h e

o t h e r

if

t h e

has

that

m e a n s

S i n c e

rate

T h e a n d

w a s

the

a s k e d

(that

e s t i m a t e d

their

0 . 4 1

as

identifications),

o t h e r

k i n d

cabs).

T h e

o f

t h e

c a b

in-

subjects

t h e

is n u m e r i c a l l y

H ) ,

for

t h e

b y

|

"cor-

e q u i v a l e n t the

a u t h o r s

i n f o r m a t i o n ,

s a m e

t h e

c o n c l u s i o n

w a s

p o s e d .

w i t h

w a s

c o n s i d e r e d

o t h e r

"biases"

r e a s o n i n g . as

t h e

base o f

w e l l - e s t a b l i s h e d

a n d

that

"errors"

d u r i n g

largely

1 9 7 0

a n

has

It

a b o u t

t o

n o t

face.

B u t o f

i g n o r e d

e v i d e n c e

1 9 6 0 s

the

c o n -

diagnostic

c o n s e r v a t i v e b e e n

b e

v e r y

t h e

n e w

t o o

o l d

d u r -

a n s w e r e d , d i s t u r b i n g facts

u n d e r l y i n g

as

fact,

C o n s e r v a t i s m ,

yet

s h o u l d

r e v e l a t o r y

largely

fact.

b e

as

t h e

i g n o r i n g

s e e m e d

p o s e d .

as

facts

a n d

after

n e v e r d o

a

w e l l - e s t a b l i s h e d

p e o p l e

r e c e i v e d

o p p o s i t e

Recall

rates

w h y

s u d d e n l y

enthusiastically

t h e n

calculate

correct

B l u e

is

p r o b a b i l i t y

a n s w e r

the

p r o b a b i l i t i e s p ( D

subject

B l u e )

m e d i a n

( 1 5 %

a l m o s t

facts

t h e

h o w e v e r ,

a n t i - c o n s e r v a t i v e

it

a n d

w a s

i g n o r e

c o n s i d e r e d

q u e s t i o n

219

p o s t e r i o r

n e g l e c t

h u m a n

T h e

( 8 0 %

rate

t o g e t h e r

o f

established

heuristics,

t h e

overweighting

b e c a u s e

instead

T v e r s k y ,

p r o b l e m s

b e e n

1 9 6 0 s

o n l y

a n d

base

base

fallibility

i n f o r m a t i o n .

a c c i d e n t

subjects

o r

p r e s e n t e d

h o w e v e r ,

i n g

their

1 9 7 0 s ,

s e r v a t i s m

r u n

i n f o r m a t i o n

p r o b a b i l i t y

d r a w n

m e d i a n

mind

rates," a n d

i n f o r m a t i o n . "

a n s w e r .

d i a g n o s t i c

"base

T h e

a n d

K a h n e m a n

B a y e s i a n

t h e

called

" d i a g n o s t i c

probability.

0.80.

rect"

also

of the

t o

w e r e

m e n t a l b e

true.

D i s c o n t i n u i t y

T h e

m e t a p h o r

t h e

research

l a n g u a g e p e c t e d w i t h m a j o r

t o

t h e

talk

t h e

t h e

s t a t e m e n t s

o f

least

s h o w n

this h o n e s t p o s e d

in

f o u n d

that

l e m s .

T h e

t h o u g h t o r

k i n d

s t a t e m e n t , fifty

a w a i t first

flow.

association

is F o r is

a

o f

in

n o t

H u m p h r e y a b o u t

G e s t a l t

m o t o r

o f

a n

b y

the

c a n

us

f o u n d

a n s w e r ,

starts

w i t h

t h i n k i n g ,

the b u t

a n d

1 9 5 0 , T h e

G e o r g e a n d

A .

p s y c h o l o g y t h e y

(p.

t h e

a n d

o f

rejected

e x -

( 1 9 8 2 ) .

o f

o r

in

Slovic,

o n

t h r e e

" m o t o r "

theorists

S.

far,

t h e

m e t a p h o r .

t r a v e r s e d "

s u m m a r y

fashionable

a r o u n d

Biases

v e r y

c h a n g e d

c o m p a r e

n e w

b e

and

b e

t h e

n e w

shall

e x p e r i m e n t

m u s t

a w a i t

a

K a h n e m a n ,

b r o u g h t

his precise

that

q u e s t i o n

instance,

years'

w h i c h

h e g i v e s

D .

radically

as it a p p e a r e d

Heuristics

"Fifty

r o a d

t h e o r y .

t h e

t h i n k i n g ,

p o s i t i o n s

a n d

h a v e

this, w e

i n f l u e n c e d

t w o

that

years

t h e

o f

statistician p r o d u c i n g

s h o w

Uncertainty:

r e a s o n i n g

t h e s e

m e r e l y

( 1 9 5 1 )

c o n c l u d e s

t h e

t h a n

m o s t

t h e s e

Under

o r

intuitive

things. T o

field

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T v e r s k y ' s Judgment

t h i n k i n g

o l d

a n

p s y c h o l o g y

o f

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as

rather

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part

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m i n d

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that

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h a v e

3 0 8 ) .

m a i n t h e

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idea

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q u e s t i o n s

persistent

t h e

at

facts p r o b o f

t h e

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habit

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220

Statistics

h y p o t h e s i s is

h o w

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1 9 5 1 .

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tician.

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t h e

m a i n l y

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l e m s

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n e w

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single

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intuitive

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in

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typically

contrast,

t h e

w e n t

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p r o b l e m

a n o t h e r

illusion

t h o u g h t

o f

c o n s t r u c t e d

is

c o u r s e ,

calculation,

a p p l i c a t i o n

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t o

o f

c o n s t r u c t e d .

statistical

p r o b l e m s ,

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n a t u r e

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f e w

t h i n k i n g

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t h e

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r e f e r e n c e s

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1 9 8 1 ) .

t y p e

s o l v e d

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t h e

o r

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incidental

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s o

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calculations,

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basis

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theoretical t h e

calculation.

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theory.

p o i n t s

t h i n k i n g ,

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state

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biases,

subject

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t h e

p e r f o r m s t h e

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o r

t h i n k i n g

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i n t r o d u c t i o n s .

generally,

s c h o o l ,

p o s e d

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or, m o r e

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in

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e x i s t e n c e

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o r

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t o

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incidental.

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t h e pre-statistical p e r i o d

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theory.

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p o i n t s

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in

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t h e

o p p o s e d

c o n s e r v a t i s m

t h e s e

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t i o n s

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e.g.

statistics. N o n e

all

r e c o g n i z e s ,

n o t ,

g e n e r a l

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for

s e c o n d

is a b o u t

p r o c e s s e s , o u t , "

T h e

u n c o n s c i o u s

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i m p o r t a n t

inferential

c o n t i n u e s

o c c u r s

t e r m s

i n n e r

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are

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is

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third

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m o r e

e x p l a i n

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b y

t h e s e

t h e

interact

a n d

m a i n l y

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a t t e m p t s

p r o c e s s e s

p r o c e s s e s

mind

s y s t e m - u n d e r - s t r e s s .

t e n d e n c i e s ) .

m o t o r

h u m a n s . a

unitary

c o n s c i o u s

d e t e r m i n i n g

w i t h

t h e

of the

a

(see

If o r

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o n e the

Statistics

r e s t r u c t u r i n g a n s w e r t h e

w o u l d

b e s t

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i n t u i t i v e

t h e

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m u s t

c o u r s e ,

statistician.

statisticians S e c o n d ,

w h o

it

is

-

s i d e r a t i o n s

t h e

T h e t w o

f o r

it

v i e w

is

a n d

t h e o r y

q u e s t i o n s .

a n d

t h e s e

s e c o n d ,

v i o l a t i o n s ?

statistical t h e

h o w

L i k e

t h i n k i n g G e s t a l t

t h i n k i n g

-

as

K a h n e m a n ,

w a s

a

b e t w e e n single

t w o

k e y

n e w

a n d

t h e

t h e o r y

1 9 7 4 ,

n e w a n d

see

illusions h u m a n

a r e

s e c t i o n

r e s e a r c h

s h o w s

as

is.

p h y s i c a l

a n d

p r o b a b i l i t y

h a d

p r o c e s s e s

w e r e

r e s t r u c t u r i n g s

l e m . " l o n g t h e

it

t o o k ,

p r o b l e m

D u n c k e r f e r e n t

w a s

w a y s

m e d i a t e l y

a n d

a

o n e

o f

c h a n g e s

as

n o

rival

p r o b l e m s . o p p o s e d

w i t h o u t

l a w s o f

h u m a n

t o c o n -

t h e s e

e i t h e r

a n d

p r o b a b i l i t y

in

f a m o u s

p e r c e p t i o n

l a w s

(e.g. t h e

for

p e r c e i v e d

r e p l a c e d t h e

o r

e x a m p l e ,

m o t i o n

o f

i n

illusion

o f

B u t

physical

r e s u l t s

a n d

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p h i - p h e n o m e n o n .

h a s

o f

r e s e a r c h ,

p e r c e p t i o n ;

t h e

f r o m

p s y c h o l o g i s t s

p s y c h o l o g i s t s ,

a n d

a r o u n d

t h i n k i n g

p e r c e p t u a l

b e t w e e n

l a y o u t

o r

o r

as

a n

c o n t e x t

k i n d

o f

a

o n

t h e

o f

t o

d e p e n d i n g

o n

w h i c h

t h a t

also

g i v e n t h a t

t h e

a in

reality,

p r o b a b i l i t y

e.g. t o

in

o r

k i n d

b e t w e e n

initiated t h e

n o t , o f

it.

p r o b l e m s

b y

p r o b -

a n d

h o w

p h r a s i n g

F o r

o f

i n s t a n c e ,

is a p p r o a c h e d s u b j e c t

a n

p r o c e s s e s

" i n s p e c t i n g

a p r o b l e m

o f

I n n e r

t u r n

illustrate

t h e

t h e o r i s t s

i n t e r a c t i o n

t h e

t h e

o n l y

i d e a o f w h a t

p r o b l e m .

a n d

n o t

G e s t a l t

s o l u t i o n

p r o b l e m s

l a y o u t

a n

w e r e

a r o u n d "

c o n t e x t ,

s h o w

t e m p o r a l

t h e

r e a s o n a b l e

e x a m p l e

first

b u t

e x p l a n a t i o n

" l o o k i n g

f o u n d

also

t r a n s f o r m e d

i n t e r d e p e n d e n t .

r e f o r m u l a t i o n s

s u c h

T h e

m e t a p h o r

are

t h e

b e f o r e .

-

c o n s t r u c t e d ,

as

s u b j e c t

t h e

n e w

o f f e r e d

d e p e n d e d o r

are

b e s t

p i c t u r e

is c e n t e r e d

t h e

o f

t o

t h e o r y

o n e

s a m e -

least,

e x p l a n a t i o n s

p r o b l e m s

t h e

m e t h o d s , "

W h e t h e r

t h e

p s y c h o l o g i c a l

s e q u e n t i a l l y

t h e

t h r e e

i n n e r

" h e u r i s t i c

l a w s

reality

at

in

p r o b l e m .

G e s t a l t

d i s c r e p a n c i e s

h o w

A l l

D u n c k e r

t h e

o r

o n l y

statistics

p s y c h o l o g i s t s ,

F o r

b e l i e v e s

t h e r e

p r o g r a m

illusions

single

t h i n k i n g .

q u e s t i o n s

e x p l a n a t i o n

t o

v i o l a t e

t h e

as in W e r t h e i m e r ' s

p r o g r a m ,

t h e

o n e

a

G o d - l i k e

p r o b l e m s

r e s e a r c h

u n d e r l y i n g

flashed

t h a t

b y

o f

c o r r e c t ,

a c e r t a i n

a n s w e r e d

p e o p l e

if

calculates

a n s w e r s

o f

e x i s t e n c e

o n e

belief

i n v e s t i g a t i o n s

p . 1 1 2 4 ) .

b e t w e e n

p o i n t ,

r e s e a r c h

t h e

o n

t h e

d e r i v e

N e w

s u c h

b e

G e s t a l t

t h e i r

t o

p o i n t s

m o v i n g

t h e

t h e

l i k e n

d i s c r e p a n c y

T h i s

o n

d o

w e

p s y c h o l o g i s t s ,

t h e

a n d

c a n

t h e n

statistician

c o n t e x t

First, w h e r e

t h e

H o w e v e r ,

r e a l - w o r l d

u n a m b i g o u s l y

c o n t e n t

t h e n

issue.

d i f f e r e n t

e v e n

221

is b a s e d

b a s e d

o f f e r t h a t

t h e

j u d g m e n t - u n d e r - u n c e r t a i n t y

m a i n

like

c a n

mind

statistician,

this latter

m i g h t

u r n s - a n d - b a l l s

i n c i d e n t a l

exist,

b e l i e v e d

o f

a n

First,

the

r e l a t i o n s h i p s ,

b e

a n s w e r

e s t i m a t e . t h e

f u n c t i o n a l

i n d e e d

m e t a p h o r

o n e

o f

o f

of

in

dif-

w o r k e d

i n d u c e s

a

" s e t "

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i m o f

222

Statistics

p r o b l e m - s o l v i n g

s t r a t e g i e s

s u b s e q u e n t

S u c h

i n g

o n e .

e x c l u s i v e l y

g e n e r a l

r u l e s

o f

n a t i o n s

t h a t

a n

o f

t h e

m i n d

C .

u r n

t h a t t h e

t h a t

t h e

m i n d

t h a t

is t h e

e i g h t

r e s e a r c h

s t e m s

a n y

s u c h

t h e

s o l u t i o n

e x p l a n a t i o n

as

o f

o f

a

t h i n k -

c o n t e x t - i n d e p e n d e n t

m a j o r

B e a c h

f o u r

c h i p s

t h e

t h e o r e m

m e t a p h o r

subjects'

t h e

e x p l a n a t i o n

o f

in

a

p r o b l e m s t h e i r

o f

t o

as

o f

Statis-

| H),

e.g.

d r a w n

T h e y

c o r r e c t

w a y ,

f r o m

a s s u m e d b u t

p r o p o s e d

w i t h

t h a t

t h e

s y s t e m a t i c a l l y

t h e

b a s e

p r o b a b i l i t y

n e w

t h e o r y ,

p h e n o m e n o n ,

as

m i s c a l c u l a t i o n

T h i s

d o e s

m i s -

rates. J u s t

t h i n k i n g ,

H o w

t h e

e x p l a n a t i o n

chips.

b u t

e x p l a -

I n t u i t i v e

a r e

r e a s o n i n g .

d o .

discrepancy

illustrate

as a n

c o n t r a s t ,

for

a c t u a l

v o c a b u l a r y

a n d

b l u e

o v e r w e i g h t i n g

g e n e r a l

t h e

r a n g e

p o k e r c h i p s

in

d i f f e r e n t

p r o b a b i l i t i e s p ( D

p r o b a b i l i t i e s , b y

is

s e r v e

" M a n

3 0 %

E d w a r d s ,

t h e

t h e

b l u e

q u i t e

t h e

p r o p o s e d

t h e

a n d

B a y e s '

o n e s

a

n o w

F r o m

e n t i t l e d

L. R.

a n d

e.g.

for

e x p l a i n i n g

t h e o r e m .

article

i n s e r t e d .

f r o m

q u e s t i o n s

T v e r s k y ' s

n e e d s

t w o

a n d

u s e s

is t h e

e x p l a n a t i o n

e x p l a n a t i o n

h i n d e r

c o n s e r v a t i s m ,

m i s c a l c u l a t e s

calculates

c a l c u l a t i o n

n e w

a n

r e d

t h e o r e m ,

o n

B a y e s '

r e d

7 0 %

p r o b a b i l i t i e s

B a y e s '

statistical

I n

i n t u i t i v e l y

c o r r e c t l y

calculates

a n d

P e t e r s o n

c o n t a i n s

m i n d

w r o n g

W h a t

s y s t e m a t i c a l l y

p r o b a b i l i t y

o r

t h a t

p r o c e s s e s

c o n s e r v a t i s m ,

R.

clear

r e s e a r c h

e m e r g e s .

e x p l a n a t i o n .

( 1 9 6 7 ) ,

i n n e r

mind

facilitate

m a d e

E d w a r d s '

f o r

m a y

the

insufficient.

j u d g m e n t

o f f e r e d

t y p e

tician"

t h e

h u m a n

o f

b e

e x p l a n a t i o n

b e t w e e n

n e w

w i t h

t h a t

findings

t e r m s

w o u l d

B e g i n n i n g t y p e

i n

of

t y p e

just

o f

as

t h e

K a h n e m a n

b a s e - r a t e

a n d

n e g l e c t ,

c o m p a r e ?

T h e

K a h n e m a n f e r e n t

s e c o n d ,

T h e

latter

t h e a n

T v e r s k y

o f f e r

o f

p r o b l e m :

first

t h e

d i s t i n c t i o n

is p r o p o s e d

r e p r e s e n t a t i v e n e s s e x p l a n a t i o n

b e i n g

o n e

l o w i n g

A

a n d

t y p e

a n d

r e p r e s e n t a t i v e n e s s

o f

f o r

t h e

c o v e r

a

m o s t

s t o r y

for

t w o a

o f

C a b

P r o b l e m .

and

p r o m i n e n t .

A

b e e n f r o m

written. the

probability

100

t h u m b n a i l

Y o u

will

available

that

the

find

y o u r

descriptions.

p e r s o n

" i n c i d e n t a l " shall d e a l

described

f o r m s F o r

h a s

o f

s t u d e n t s 1 9 7 3 ,

five

each

is a n

h e r e

rates.

o n l y

w i t h

o f f e r e d

as

P r o b l e m

g i v e n

t h e

fol-

2 4 1 ) :

fields.

30 engineers a n d descriptions, description, o n

dif-

personality tests to

respective

engineer,

a

b a s e

b e e n

w a s

p .

a n d administered

in their

f o r

E n g i n e e r - L a w y e r

T v e r s k y ,

descriptions o f the o n

W e

t h e

g r o u p

a n d

7 0 l a w y e r s , all s u c c e s s f u l

this information,

a n d

e a c h

" r e p r e s e n t a t i v e n e s s , "

R e p r e s e n t a t i v e n e s s

panel o f psychologists has interviewed

engineers

called

" c a u s a l "

p r o b l e m s ,

( K a h n e m a n

e x p l a n a t i o n s ,

" h e u r i s t i c "

heuristic. class

m a j o r

b e t w e e n t h e

h e u r i s t i c

a

O n

the

7 0 lawyers

chosen

please scale

basis

at

o f

have

r a n d o m

indicate

f r o m

30

1 t o

y o u r 100.

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Statistics

T h e

same

task

has

b e e n

p e r f o r m e d

accurate in assigning probabilities b o n u s

to the e x t e n t

A

s e c o n d

i n v e r t e d

s u c h

A l l

as

J a c k

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rates,

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that y o u r

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carpentry,

sailing, a n d

engineers

K a h n e m a n

w e r e

w e r e

o f

a n

f o r

a

223

panel

of

experts,

w h o

the various descriptions. Y o u

r e c e i v e d

g i v e n

t h e

w e r e

highly

will b e

paid

close to those o f the expert

t h e

p r o b a b i l i t i e s ,

o n l y

s a m e

n a m e l y

s a m e

s t e r e o t y p e :

ambitious.

sample

m o s t

five

7 0

e n g i n e e r s

a

panel.

i n s t r u c t i o n s

p e r s o n a l i t y

t h e

t h e

n o

w i t h

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d e s c r i p t i o n s

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H e

is

in political

hobbies w h i c h

probability

generally a n d

social

include

h o m e

that J a c k

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of

%.

t h a t

t h e

s a m e ,

a n d

w a s

children.

interest

his m a n y

is

t h a t

b e t w e e n

d e g r e e

four

puzzles. T h e

f o u n d

p a r t

has

s h o w s

o n

100

e x p l a n a t i o n

i.e. t h e

heuristics,

time

o f

and

H e

mathematical

similarity

h e n c e

is m a r r i e d

T v e r s k y

t h e

t h e

H e

of his free

the

T h e

e n g i n e e r ,

o t h e r

in

a n d

i g n o r e d .

j u d g i n g

w e r e

mind

estimates c o m e

p r i o r

and

spends m o s t

g r o u p s

by

s t u d e n t s

m a n .

issues a n d

30

to

the

f o l l o w i n g :

conservative,

the

of

t h e

t h e

w h i c h

r e s p o n s e s

c o n c l u d e d s u b j e c t s

d e s c r i p t i o n

a d e s c r i p t i o n

" r e p r e s e n t a t i v e n e s s

r e p r e s e n t a t i v e n e s s

m e a n

t h e

s o l v e

t h e

a n d

t h e i r

t h e

t w o

b a s e

r a t e s

p r o b l e m

T o g e t h e r

w i t h

as

o f

p r o p o s e d

a

b y

s t e r e o t y p e

i s representative

h e u r i s t i c . "

w a s

t h a t

in

l a w

o f

t h e

a

f e w

h u m a n

t h i n k i n g . L e t is

u s

e x a m i n e

p r e s e n t e d

K a h n e m a n its o w n , n o t

t h e

k i n d

o f

t h e

w h i c h

t h e

o n

q u e s t i o n s

p o i n t ,

w e

t o

t e r m

i n f o r m a l

a n d

t h e

first

a n d

t h e

a

a n d

t h e

o f

i n c o m e

is c l o s e

t r i b u t i o n

v a r i o u s

h e u r i s t i c "

t o

D

a

c o l l e g e m e a n is

s p e a k

b u t

a n d

t h e

d e t e r m i n e d

a n d

K a h n e m a n ' s w h i c h

precisely. falls

is d e f i n e d d e f i n e d ( m o r e A

v a l u e

f r e q u e n c y b y

w h a t

in

h a v e

o n e

this

o r

less)

D

will

s u b j e c t

m o s t o f

k n o w s

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t o

o w n

m a k e r e c e n t g i v e n

c o n c e p t t h a t

o f

a

b e t w e e n F o r

a

I n

class

H

illustration, v a l u e s

o f

r e p r e s e n t a t i v e i n c o m e s ; o r

a

j u d g -

c a t e g o r i e s .

r e p r e s e n t a t i v e b e

in

o r d e r

is

w a y

p r e v i o u s l y

f o u r

class.

d i s t r i b u t i o n a

I n

e x p l a i n

o f

o f

a n d

A n o t h e r

e x p l a n a t o r y

T h e y

a n d

a logic

v o c a b u l a r y

as a r e l a t i o n in

" h a s

( 1 9 8 2 a )

t h e y

t h e

T v e r s k y

It

o n l y p r o v i d e d

e x p l a n a t i o n .

d e f i n e

r e l a t i o n

n o t

t h e

t h e

m o r e

o f

h a s

closely.

p r o b a b i l i t y "

f r e q u e n c y . "

also

t o

a n d

l o g i c o f

i n c l u d i n g

m e a n i n g s

p r o f e s s o r s . o f

t h e o r

m o r e

this h e u r i s t i c

t h e o r e m

p o s e d ,

v a r i a b l e

T v e r s k y

t h e

itself

o f

f r o m

B a y e s '

c o n c e p t

s t r a t e g y ,

t h a t

p r o b a b i l i t y

case, r e p r e s e n t a t i v e n e s s v a l u e

c l a i m

T v e r s k y

r e p r e s e n t a t i v e n e s s

K a h n e m a n

it

o f

" r e p r e s e n t a t i v e n e s s "

b y

s h o r t h a n d

p r o b l e m s

t o

t h e

e x p l a n a t o r y

s y s t e m a t i c a l l y

is d e s c r i b e d ,

" r e p r e s e n t a t i v e n e s s m e n t

this

is as f o l l o w s :

refer

clarify

o f

explicitly

i m p r e s s i o n s

s i t u a t i o n

a t t e m p t

a n

d e p a r t s

p h e n o m e n o n

t h e

n a t u r e

( 1 9 8 2 a , p . 88)

" b a s e d

v i e w

as

t h e

t h e

a s s u m e s

if

dis-

a b o u t

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224

Statistics

t h e s e

i n c o m e s .

It

is

r e p r e s e n t a t i v e n e s s tain

as

o f

o c c u r s

I n

t h e

w h e r e

s u c h

i n

a n

e l e m e n t .

t h e

o f

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case

b e

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a t t r i b u t e s k e t c h ) , o n e

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t o

a

a n d

causal

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c o n s i d e r

n e c t i o n s

t o

fall

t w o .

F r e q u e n t

case,

e x c e p t

e v e n t

D

h o w e v e r , A l l

l a n g u a g e First,

just

e x p l a i n i n g rate

o f

h a s

i m a g e s ,

T h e

p e o p l e

u s e

f o r m a t i o n

a o f

is e x p l a i n e d all.

A n d

t h e

| H)

a r e

a

b y

h a r d l y

b u t

|

H)

t y p e p ( D o f

s t u d e n t s

a t t r i b u t e t h e

(as

s e c o n d

f r e q u e n c y

w e

t h e

see

t h a n

a

w i t h / ( H ) ,

h a s

a n d

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rates.

f r o m

all

as

t h r e e

a n d

a n

a n d c o n -

b e t w e e n

a n d

S u c h

r e l a t i o n

causal

e q u i v a l e n t H

a

K a h n e m a n

d i s t i n c t i o n

t w o

t h a t

t o t h e

t h e

t h e

first

v a l u e

o r

i n t e r p r e t a t i o n ,

t h e

B a y e s '

o f

c o n c e p t s it

is

n o t p(H).

b e c a u s e

this

w h i c h

o b v i o u s

b y

is, n e g l e c t

f r o m

w h i c h

t h a t

t h e

p h e n o m e n o n .

t h a t

h a s

( b a s e -

a s s o c i a t i o n

p e o p l e ' s

t h e o r y

f o r

P r o b a b i l i t y

as

t h e

m e a n s

T h a t

| H ) ,

t h e o r e m

is e x p l a i n e d

P r o b a b i l i t y

m d p ( D

o f

t h e

v o c a b u l a r y

s u c h

n o w

b y

c o n s e q u e n c e s .

probability.

r e d e s c r i p t i o n

a n d

s h a p e d

c o n c e p t u a l

f r o m

S e c o n d ,

n e g l e c t

a r e

i m p o r t a n t

l a n g u a g e

heuristic,

| H)

p e r s o n a l i t y

g e n e r a l i z i n g

d e f i n e d

s y s t e m

e x p l a n a t o r y

insight.

t h e

identity.

d e v i a t e

t h e

s e c o n d

p r o b a b i l i t y .

r e p r e s e n t a t i v e n e s s

w e

t h e

o n e - d i m e n s i o n a l

v a r i a b l e s

f o r m a l l y

s u b s e t ,

r e p r e s e n -

c o n j e c t u r e ,

is

n o

p e r -

p s y c h o l o g y .

t h a t

c o n s e q u e n c e .

m a k i n g

a

less

o f

in

b y

a n d

a s s o c i a t e d "

b a s e - r a t e

c o n c e p t s p(H)

a r e

a n d

a r e

a

P r o b l e m ,

p a r t i c u l a r

class

a s t r o n o m y

T h e r e f o r e ,

f o r m a l

earlier

n o t

o n e

analysis

m o r e

o f

a

a

t h e

least

f r o m

a n d

b e t w e e n

i n t e r p r e t a t i o n .

o f

a n d

g e n e r a l i z i n g

j u d g m e n t s

called

n e g l e c t

t w o

(D

b e t w e e n

E n g i n e e r - L a w y e r

b y

b e t w e e n

t h e

T h i s

as a r e l a t i o n

e n g i n e e r s

p o s s i b l e

causal

m e a n i n g s

o f

f r o m

at

r e p r e s e n t a t i v e n e s s t h e

this

state

o f

a

r e l a t i o n

r e s t r u c t u r i n g

v a r y w i t h / > ( D

d i s t r i b u t i o n ,

t h e m s e l v e s

h e a d i n g ,

c h a n g e

is

o f cer-

t h e p r o b a b i l i t y p

r e p r e s e n t a t i v e n e s s

a n d

this

r e p l a c e d

p h e n o m e n o n

m e a n i n g ( U n d e r

87)

t h a n

" f r e q u e n t l y

g i v e n

is

p .

e l e m e n t s .

is itself d e r i v e d

" e x p l a n a t i o n "

t o

a b o v e

t h a n

first

case,

p e o p l e ' s

n o w

t h e

probability.

f r e q u e n c y

r e l a t i o n

b o d y

c o n s e r v a t i s m ,

w h y

neglect)

t h e o r y

f o r

a

a s s e s s m e n t

p r o b a b i l i t y .

as

t h e

f o l l o w s

o f

last

t h e

f o u r

o f

case

u n d e r

n o t

a n d

case

is d e f i n e d

s t u d e n t s

m o r e

a s s o c i a t i o n s

d o e s

t h e s e

t o

b o t h

n o w

first

r e d u c e d

class

is

t h e

s y s t e m

t h a t

is

case

f r o m

t h e

is

( 1 9 8 2 a ,

s u b s e t

f o u r t h

b e t w e e n

b e

t h e

s t u d e n t

t h i r d

t o

this

f r e q u e n c y

c a n

w h e t h e r

i n c o m e )

r e f e r

t h e

i n

s y m m e t r i c

e x a m p l e

t h i r d

d e r i v e d

e l e m e n t

I n

A n

K a h n e m a n

a n d

m e a n i n g s

o f

mind

t h e o r e m . )

q u e s t i o n

(e.g.

t h a t

e q u a l

is b e t w e e n

T h e

t h e

the

case, r e p r e s e n t a t i v e n e s s

r e l a t i o n

in

as

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s k e t c h .

as

t a t i v e

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s o n a l i t y

see

r e p r e s e n t a t i v e n e s s

it

class a n d

t o

is a s s e s s m e n t

c o n d i t i o n s ,

m e a n i n g

easy

of

j u d g m e n t s s a y i n g

t h e y o f

t h a t

u s e

b a s e

inr a t e s

e n c o m p a s s e d t h e

p o s t e r i o r

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Statistics

p r o b a b i l i t y

is

calculated,

p h e n o m e n a

a n d

t h e

of

n o w

the

s e r v e

as

h a v e

t h e

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l o o k e d

s h o w n

for.

g e n e r a t e d s u c h

as

t o

a s k i n g

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t w e e n t o

0

e x p r e s s

jects

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a r e

since

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t h a t t h e

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t h e

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s h e

t h a t

are

m o d e s .

i n d e e d

f o l l o w . s u c h o t h e r , e v e r ,

S u c h

as

t h e

r a t h e r

w h e t h e r ,

abilities

s h e

belief

b y

m a y s h e

a n

b y

o f

f e e l i n g

t o

o f

s h e

is

b e

o f

n o t ,

a n d

r e p r e s e n t e d

s w i t c h i n g s u b j e c t i v e

e s t i m a t e s certainty

is

o f o r

b y

f r o m v a l u e

o t h e r

m o d e s

recently,

still

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are

h e r

m a y

m a y

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m o r e

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n o t

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shift

c o n t a i n

b e -

u n c e r -

t h e n

shifts

s h e m a y

p r o b a b i l i t i e s ,

c e r t a i n

o r

a n x i o u s

t h a t

p r e g n a n t ,

b e t w e e n

p r o b a b i l i t y

o n .

p r o b a b i l i t y

t r a n s i t i o n o n e

o w i n g

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a w o m a n

s o m e

s u b -

1 9 3 0 s

o n l y

s h e

o f

u n c e r t a i n t y .

m a y

p h a s e s

definitely

levels

o l d e r ,

u n c e r t a i n t y

b e l i e v e

b e -

a s k i n g

a s s u m e

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o f

l e a r n e d

o f

late

s u b j e c t i v e

t r a n s i t i o n

definitely

bit

this

c o n s i d e r

a

n u m b e r

e x p r e s s

h o w e v e r ,

t h e

a n u m e r i c a l

states

say

a

b y

t h e

d o

s e n s e

k i n d

topics.

all e v e n t s ?

t o

subjects,

it m a k e

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subjects

l e a r n e d

earlier t h o u g h t

this

t e r m s

little

for

illustration,

D o e s

t h e s e

o n

i n t o

i n

f r o m

a n d

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a

o n l y

m i g h t

n u m e r i c a l

b e t w e e n

h a v e

w h e r e

f r e q u e n c i e s

t h a n

o n l y

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A s

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p r o b a b i l i t y .

u n c e r t a i n t y

relative

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t h e m s e l v e s

g e n e r a t i n g

n u m e r i c a l

certainty,

t o

results

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o f

shift

n o t

s t i m u l u s

p s y c h o l o g i c a l

is

w e r e

p r o b l e m

N o b o d y

u n c e r t a i n t y

h e a d s ,

d a t a

d u r i n g

b a s i n g a t h e o r y

p r e g n a n t ?

t w e e n

m a y

o u r

o f

t h e o r i s t s

N o n e

e x p e r i m e n t e r s

S.

q u e s t i o n s ,

r e f o r m u l a t i o n s

p r o b a b i l i t i e s .

o t h e r

o f

n u m e r i c a l l y ,

fixed

t i m e

t h e

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b e t w e e n

p r o b a b i l i t i e s )

in

is p r e g n a n t .

r e p r e s e n t e d

o n e

b o t h

e x p l a n a t i o n s

k i n d s

a l o u d

m e a s u r e d .

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i d e a

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infer

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f o r

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t h i n k

t i m e

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t r a n s l a t e

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n o t

a

A t

i n

t o

o f

o r

u n t i l

as

tainty.

t h o u g h t

o c c u r

r e p r e s e n t e d states

r a t i n g s

r e v o l u t i o n .

s h e

is

usually

e x p e r i m e n t e r s

o t h e r

w h e t h e r

w a s

p r o b a b i l i t i e s

i n f e r e n c e

for

r e s e a r c h

W h a t

F o r

t h e

p r o b a b i l i t i e s ,

p r o b a b i l i t y

b y

a d d i t i o n ,

u s e d

w o r k

e v e n

u n c e r t a i n t y

r e p o r t s

l i k e l i h o o d s .

t h e r e

j u d g m e n t s R e c a l l

t o

d a t a ?

v e r b a l

t o

( b u t

t h e

t h i n k i n g ?

s u b j e c t s

n o t

n u m b e r s

o f

t h e

o b s e r v e d ,

s u b j e c t s

c o n f i d e n c e

a n d

v o c a b u l a r y

c h a n g e d

t h e i r

I n

for

a s k i n g

t h e i r

p a r t i c u l a r l y

n a t u r e

s t u d y i n g

1 d i d

significance

i n f l u e n c e

h o w e v e r ,

o f

a n d

also

( s o l u t i o n )

f o r

h a s

p h e n o m e n a

t h e s e

s u b j e c t s

e i t h e r

T h e

t h e

m e t a p h o r

i n s t r u c t e d

a n s w e r

t h e

d a t a

t h e

p r o c e s s e s .

e x p e r i m e n t e r s ,

data,

it

u s e d

r e s t r u c t u r i n g

a b o u t

d i d

s t u d y

a n d

a n d

t h e

p o s e d ,

D u n c k e r

s o l v i n g ,

l e m )

t h a t

B u t

225

e x p l a n a t i o n s .

N e w

W e

mind

0

state a n d

1.

t r a n s i t i o n t h e

t o

t h e

H o w p r o b -

a p p r o p r i a t e

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226

Statistics

d a t a

for

a

t h e o r y

o f

j u d g m e n t

of

u n d e r

the

mind

u n c e r t a i n t y

is a

q u e s t i o n

a l m o s t

n e v e r

p o s e d .

6 . 6

I n

t h e

f o r m a l

T H E

R E T U R N

e i g h t e e n t h

c e n t u r y ,

d e s c r i p t i o n

o f

as a p r e s c r i p t i o n n i n e t e e n t h

last in

t o

t h e

d e c a d e s ,

as

c e r t a i n

a

t h e

c u l a t e d t i o n s F o r

w o u l d

results

a r e

3 3 9 - 4 0 ) t h a t d o

this

i n s t a n c e ,

w h o

"it n o t

c h a n g e s

a n d

t h e

ideal

t h e

t h e

r e a s o n a b l e

o f

l e a r n

a n d

p e o p l e

(Slovic, results

b a c k ,

t h i n k i n g

d i s c o v e r e d

least

D i v i s i o n

d i s m a l l y

in

1 9 7 1 ) .

P e t e r s b u r g

p r o b l e m ,

m a t h e m a t i c s

a

o f

t h e o f

w i t h

t h e b e t t e r

t w e n t i e t h - c e n t u r y

least

t h e i r

test

F a c e d

t o

in

b u t

p s y c h o l o g i s t s .

at

at

" b l e a k

a

o n e

a n d

b e

cal-

D e v i a t h o u g h t .

" f o r

a n y o n e s u c h

( 1 9 8 3 ,

p p .

i n f e r e n c e "

u s e

in

a n d

s u c h

tasks

o t h e r s

r i n g

f o r

m a n y

L i c h t e n s t e i n ,

s m a l l t o

A m e r i c a n t h e i r

elite t h e i r

t o

1 9 7 6 )

f o r

h u m a n

b e

E v e n

case

d i c t a t e s

o f

s h a d o w

r e a s o n a b l e , t h a t

their

t h e

c o m e

s o

o f

t o

n e w

n o

colleagues

o n e

in

A s s o c i a t i o n

t h e p e r -

( T v e r s k y

s o l u t i o n

p r o b a b i l i s t s c o m m o n

t h e

a l m o s t

i n t u i t i o n s in

f o r m

e i g h t e e n t h - c e n t u r y

d i s m a y

statistical

h a d

t h e

P s y c h o l o g i c a l

a c o m p a r a b l e

p s y c h o l o g i s t s

in

W h e r e a s

e x p e r i m e n t s .

t h e

u n -

e i g h t -

t h e o r y .

i m p l i c a t i o n s

o n l y

e i g h t e e n t h - c e n t u r y fit

t h e

p r o g r a m s

a n d

in

m u s t )

A n d

c o r r e c t

F i s c h h o f f , h a v e

a s s u m e d

-

t h e

r e v i v e d

h a v e

K u n d a

p e o p l e

p r i n c i p l e s . "

t h e

statistician,

o f

as

1 9 7 5 ) .

i n d e e d

t h e s e

a n d

e r r o r s

h e u r i s t i c s

" l a c k

B o r g i d a ,

w a s

s e r i o u s

statistical

like

t h a t

i n t u i t i v e

t h e

p r o b a b i l i t y

h u m a n

c o n c l u d e

r e a s o n a b l e

t h e

in

t h e

in

w a s

a

a n d

in

a c t i o n

( i n d e e d ,

K r a n t z , J e p s o n ,

t h a t

t a s k s "

o f

a

a n d

p r o b a b i l i t y

( 1 9 7 2 )

m a n ,

m a s s e s ,

o f

p r o b l e m s

c a n

o n c e

2). B u t

v i e w

i r r a t i o n a l i t y

c o m m i t

r e q u i r e d

m a n

K a h n e m a n ,

t h e

as

N i s b e t t ,

t h e m e :

m i n d s

h a d

M a t h e m a t i c a l

t h e i r

t o

( N i s b e t t

p s y c h o l o g i s t s

f o r m e d

m a n

t h e

1 a n d

belief

t h e i r

a n s w e r

a n d

o f

p s y c h o l o g i s t s ,

t h a t

at

N

b e c a m e

p r o b a b i l i s t s

r a t i o n a l

m a t h e m a t i c a l

T v e r s k y

e x p e r i m e n t a l

r e a s o n a b l e in

a n d

statistics

n o r m a t i v e

o f

this

biases

" p e o p l e

j u d g m e n t a l

p r o b a b i l i s t s

w a s

t h a t

s a m e

t h e

A

d i s a p p e a r e d

c h a p t e r s

classical

a s s u m e

o f

r e v e a l

v i e w

t h e

(see

t h e

h i m ,

t h a t

r u l e s

d i s c o u r a g i n g . "

r a t i o n a l i t y "

a n

t o

r e s p e c t

finally,

T h e

t h e

is d i s t u r b i n g

i m p o r t a n t

a n d

K a h n e m a n

w i s h

o f

a n d

as

r e a s o n a b l e

irrationality

t w e n t i e t h - c e n t u r y

a n s w e r

c o n c l u d e

o n

w i t h

a n s w e r , t o

t h e

c o d i f i c a t i o n

M a n y

a c c o r d i n g

f r o m

a l o n g

t h e o r y

M

i n t e n d e d

i n t e r p r e t a t i o n

i n d i v i d u a l s m a n

w a s

a p r o t o t y p i c a l

p r o b a b i l i t y

o f

R E A S O N A B L E

t h e o r y

us. T h i s

m a t h e m a t i c i a n s ,

c o r r e c t

o f

d e s c r i b i n g

m a t h e m a t i c a l

s i t u a t i o n s .

o n e

o f

o f

r e a s o n a b l e

a n d

e e n t h - c e n t u r y o n l y

rest

r a t i o n a l i t y

p s y c h o l o g y ,

t h e o r y

p r o b a b i l i t y

w h e n

m e a n s

T H E

i n t u i t i o n s

t h e

c e n t u r y ,

m a t h e m a t i c a l o p p o s e d

f o r

t h e

O F

t o

h a d

r e a s o n . r e v e r e

a n d

t h e

St.

r e v i s e d H o w e v e r ,

t h e

m a t h -

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Statistics

e m a t i c a l

t h e o r y

c o m m o n F o r

t w o

r e a s o n

t h e

single

o f b e

a b o v e

c o r r e c t

m a j o r

a n s w e r

a n d

o f

s e c o n d ,

o f

t h i n k i n g

p . 1 1 2 4 ) .

A

bias

tial.

a n d

F o r

this

e x p l a i n e d

b y

i.e.

t h e

t h e

n o r m a t i v e

t i o n

g r o u p

w o u l d

c h o s e n , w o u l d

a n s w e r

a n s w e r .

s t a n c e ,

w a s

t h e

n e c e s s a r y t h e

t o

h a v e

o n e

r e p l a c e

a s s o c i a t e d p r o b a b i l i t y o n e

jectivity t h e r e F o r

n o

this

p r o b l e m s s e e m e d w o r l d ,

h a s

t o

h a v e

a n d

it

o r

t h e

c l a i m

v i d u a l s

n e w

t h a t

s e e m s

N e y m a n

in

c o r r e c t

a n s w e r 0.80

e s s e n -

f r o m

is t h e t h e

t h e

bias

t o

d a t a

itself,

d e v i a t i o n

f r o m

s o l u t i o n ,

t h e

o f

d e v i a -

0.80

b a s e - r a t e

s e v e r a l

o r

a n d

w e r e n e g l e c t

o n l y

s c h o o l .

s o l u t i o n s ,

o f

o n e

F o r

in-

it w a s

t h e o r e t i c a l

n o t

c o m e

P e a r s o n ' s

w h i c h

o f

t h e

in

t o

t h e

n o t

analysis

f r o m

h a s

m o s t

his

usually

a l l o w

e x a c t l y

a n d

p o s t e r i o r

o n e

c o r r e c t

usually h u m a n

in

at

least

t h e o r e m

S u b -

u r n s - a n d - b a l l s B a y e s t o

h i m s e l f t h e

P r o p o n e n t s t h a t

its

p r o b a b i l i t i e s .

t h e o r e m

lifetime.

t h e

a p p l i c a t i o n s

p r i o r

T h o m a s

o f

w i t h

e l i m i n a t e d .

i n c e p t i o n .

d i f f e r e n t

t h e o r y

t h e

(2)

o f

n o t ,

B a y e s '

b e e n

a n d

v i e w

r e a l - w o r l d

p r o b a b i l i t i e s ,

this

a r e

b e y o n d

his

first

s t u d i e s

t h e o r e m

d u r i n g

v o i c e

t h e

t h e y

e a r n e d

a p p l i c a t i o n

h a s

n o t

a b o v e

d e t e r m i n e

its

p r i o r

is

t h e

o n e

e m e r g e d

p r o g r a m ,

since

w i t h

p r o b l e m

It

p r o b a b i l i t i e s "

w a y

w i t h

rules

A l t h o u g h

p r o b a b i l i t y

i n f o r m a t i o n

s p e a k s

statistics.

since

a g i v e n

a n d

biases

1 9 7 4 ,

its

t h e

t h e

K a h n e m a n ,

G e s t a l t

for

f o r m a l

subjectivity

s u b j e c t i v e

t o

(1)

B a y e s i a n

p u b l i s h e d

d i f f e r e n t

s a m e

a

a b o u t

jects

t h e

like

criticized

n o t

b y

h y b r i d

a p p l i c a t i o n

i n t e r p r e t a t i o n

t o

t h e

f r o m

a

s o m e

P r o b l e m

h a d

o f

r e v e a l

s o l u t i o n

p r o b l e m

s o l u t i o n

t o

o f

s u p p o s e d

a n d

s e e n

c o r r e c t

o n e

r e a s o n a b l e

c o r r e c t

o b j e c t i v e

s u b j e c t i v e h a v e

m a n y

t h e o r e m ,

d o u b t s

w a s

a

b e

it is n o t

a

e x i s t e n c e

n o r m a t i v e l y

b u t

t h a n

t h e

W u r z b u r g

" s u b j e c t i v e

t h e

b e e n

a n d

statistics

T h e

B a y e s '

r e a s o n ,

z e r o

statistics.

l o o k

u n d e r

u n i q u e

i n s t a n c e ,

j u d g m e n t t h e

r e s p e c t .

e n t e r s

is

o f

r e v i s i o n

classification

if,

h a s

t h a t

B a y e s i a n

i m p o r t a n t

T h u s ,

m o r e

for

t h a t

p r o c e s s .

p e r s o n a l

w i t h

t h e

C a b

e x p l a i n e d ,

w h e t h e r

single

v i e w

i n s t i t u t i o n a l i z a t i o n

b e

insisted

i d e n t i f y

a v e r a g e

a b o v e

t h i n k i n g .

a

single

g r o u p

t h e

t o

b e

P r o b l e m

n o r m a t i v e

s h o u l d

t o

a

c a n

a n d

f r o m o f

t h e

j u d g m e n t

e x i s t e d

a n d

w o u l d

i n c i d e n t a l

T u m o r

a r e

c o n t r a s t ,

r e s t r u c t u r i n g

T h e

t h a t

o f

i n s t e a d

First,

( T v e r s k y

t h e

in

T h i s

in

deviation

o f

0 . 4 1

If t h e r e

d e v i a t i o n

"biases

t h e

t h e y

p r o g r a m :

a s s u m p t i o n

o f

d i f f e r e n t ,

I n

as

h e u r i s t i c

a v e r a g e s ,

d i s a p p e a r .

a s s u m p t i o n .

d e v i a t i o n

s o m e

b e

t h e

s o l u t i o n

o f

t h e

t h a t

irrationality,

u n c e r t a i n t y "

t h e

227

m a t h e m a t i c s .

h u m a n

t h e s e

u n d e r

mind

t h e

r e s e a r c h

u s e

m a k e s

c o r r e c t

fit

a b o u t

d e f i n e d

i n s t a n c e ,

s u p p o s e d b e

is

t o

n e w

the

statistics

i s a necessary t h e

h e u r i s t i c

a n s w e r ,

a n d

r e f o r m e d

c o n c l u s i o n

s t e p s

j u d g m e n t ,

p r o b a b i l i t y

of

real

o f

d i f f e r e n t

t h e r e f o r e

t h e s u b -

r e s p o n d

p r o b a b i l i t i e s .

T h u s

a n s w e r

i n d i -

for

all

c a m p .

h a d

m o r e

i n f l u e n c e

o n

t h e

insti-

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228

Statistics

t u t i o n a l i z e d

h y b r i d

t h e

o n e

issue

o f

statistics t h a n

c o r r e c t

N e y m a n

a n d

a n d

c o n t i n u e d

t h e y

j u d g m e n t s

P e a r s o n

in

t h e o r y

O f

-

o r

b o t h

o f

use o u r

the

s e e m e d

S i n c e P e a r s o n

o f

t h e o r y

also

let

u s

is t h e

h e a r t

o f

t h e

p u b l i s h e d

his

statistics

i n f e r e n c e . t a u g h t h a v e

o t h e r

tics s e e m s o f

t o

b y

n u l l

g o d s

b e

j u d g m e n t

T h e

1 9 3 5 ,

M e d i a t e d t h e

i n

w e

find

t h e

u n d e r

o b j e c t i v e

t h e

v e r y

t o

t h e

T h e

ical

a

m o r e

t h a t

t h e

r a t i o n a l

t h e

t h e y

W h a t P r o b l e m ?

n o t

T h i s

ask.

Is

t h e

such

t h e

n u l l

a

t h e i r

for

matters

the -

to

h y p o t h -

effects

a n d

N e y m a n

h y p o t h e s i s

p r e s e n t e d

o f

i n d u c t i v e

p s y c h o l o g i s t s a n d

t h a t

o n l y - o n e - a n s w e r n o r m a t i v e

Experiments,

H e

p r o b l e m

statistics

t e s t i n g

of

m e s s a g e .

t h e

a n d

o n l y - o n e - a n s w e r

Design

w r i t e r s ,

balls

v i e w

r a t i o n a l i t y shall

( f o r if

w h o l e

w e

a p p l y

o f

t h e t r u e

t o

t h e

v i e w

in

w e r e

t h o u

t h e

shalt

o f

statis-

p s y c h o l o g y

p e r s p e c t i v e

a n

o f

t h i r d t h e

level

t o

t h e

just

C a n

c o n t r a s t

a r g u e :

m o r e

in

N o .

c o n t e n t f o r m u l a e .

a n d b u t

m e c h a n e q u a l l y

1 9 8 7 ) .

P e a r s o n ' s

n o t

I n

shall

t h e

b u t

t h e o r y ?

a l t e r n a t i v e

see J e f f r e y ,

c h a n g e s ,

o f

p o s e d ? w e

illusion.

place,

r e p e t i t i v e

o f

a n

d e c i m a l

a d d i t i o n

t h a n

a n d

t h e

u n c o n t r o v e r s i a l ,

c o u r s e ,

c o n t e n t ,

e x a m p l e s

N e y m a n

is,

is

p r o b l e m s

in

o f

statistics

at

w i t h

m o r e

e x a m p l e s

i l l u s t r a t i o n

u n c e r t a i n t y , "

i m p o r t a n t

p r e s e n t

o t h e r

s a m e

filled

is

a n

"statistics"

in

u n d e r

a r e

c o n t e n t , W e

v i e w :

i n f e r e n c e

a n s w e r

" j u d g m e n t

a n d

t h a t

s i m p l y

b e c o m e s

T h e

is

i m p e r i a l i s m

r e a s o n i n g

h a p p e n s

o f

o f

t e x t b o o k

i n d u c t i v e

c o r r e c t

o f

u r n s

s o l u t i o n s

in

vary,

d i f f e r e n t

in t h e

t e x t b o o k s

f o r

single

calculation.

o f

a g a p

o f w o r t h w h i l e

influential

s o l u t i o n

o n e .

c o m p o n e n t

d i v e r g e

p r o p o n e n t s

d e p e n d e n t W i t h

b y

t h e o r i e s

g i v e

his

m e t h o d

this

p a r t

m o d e l

n o r m a t i v e

t h e o r y

q u i t e

e n t h u s i a s t i c

m a k e

d i s t i n g u i s h e d

likely class o f a d m i s s i b l e

t h e

w h o s e

f o r m a l

t o

itself:

j u d g m e n t

m a t t e r s

f o r

I n

o n ,

396).

" o n l y - o n e - a n s w e r "

q u e s t i o n s

statistics

p.

h a s

i n f o r m a l

i n

1 9 2 8

alternatives,

r e a d e r

mathematical

personal

in

u n c e r t a i n t y .

i n s t r u m e n t

Statistical

o r

t o w a r d s

among

clearly

s u b j e c t i v e

t h e s e

a

h y p o t h e s i s

a m a i n

s p r e a d

o f

statistics.

b e f o r e

n o r m a t i v e

i d e a

T h e y

a t t i t u d e

p a p e r

one

c o m p e t e n t

in o u r

1962,

e x a g g e r a t e d

T h e

left

Fisher,

h y b r i d

as

sufficient

c a n d i d a t e

t o

as if it w e r e

t h a t

n o

n o

t u r n

in

t h e

t h e i r

j o i n t

level, the m a g n i t u d e

(Pearson,

j u d g m e n t s

T h u s

t h e

n e i t h e r

significance

is

t h a t

process

p e r s o n a l

first

a p p l i c a t i o n .

us, w e

w a s

a p p r o a c h

as the choice o f the m o s t

utilities

v i e w .

first

-

appropriate

balance

to

mind

t h e i r

t h e i r

f r o m

a n d

intuitive

terminology

eses, t h e

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a m o r e

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e m p h a s i z e

f o r m a l

n e c e s s i t y , a s it

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a n s w e r ?

p a r t i c u l a r

the

Bayes'. W h a t

p r e s e n t e d

t o

e v e r y

m a t h e m a t i c a l

of

t h e

t h e o r y t h i r d

t o

t h e

C a b

d e c i m a l .

T h e

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Statistics

f u n d a m e n t a l tial

for

a n d

in

a n d

u s e d

N e y m a n t h e

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illustration.

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o n

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n i g h t

t e s t i m o n y .

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further

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is

T h i s

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t h e o r e m B l u e o f

t h e

v i e w ,

o b v i o u s .

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us

v i e w s

calculate t h e

o n

t h e

Bayes' t h e

that

o f

o f

s u c h

t h e

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pairs for

t h e

t h e

t h e

S i n c e

t h e

o n

t h e b o t h t h e

o n

t h e

N e y m a n

a n d

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t h e a

calculus

t h e

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w i t n e s s

cabs

in

m i n i m i z e s />("G"

has

m i n i k n o w s

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city.

overall

| B)p(B).

T h e

a l t h o u g h for

ratio).

error

w i t n e s s

w a y

t h e

t h e

t w o

c a b

likeli-

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that

t h e m

t h e

c a b

a p p r o a c h e s

c a n

essential

witness'

u s e d

P e a r s o n ' s the

c o s t -

"Blue."

different

a p s y c h o l o g i c a l

reflects

that

t e s t i m o n y

o n

t h e

p o i n t

T h e

G r e e n

is c h a r a c t e r i z e d

(located

a

the

that

a n d

p r o b l e m .

a n d

w a s

w e

a c c i d e n t

for

is

o n

T h e

w h e r e

t o

l i k e l i h o o d

it

" B l u e . "

k n o w

values

(as

v a l u e

is i n

n u m e r i c a l

specify

t h e o r e m

N e y m a n

n e e d

T h i s

that

1 9 8 3 ) .

w i t n e s s

" G r e e n "

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t w o

t h e

saying

a

are

as

c u r v e .

a s s u m e

0.82(!)

s a m e

o t h e r ,

+

is

psy-

if a subjective

\ G)p(G)

witness'

probabilities o f

t h e

cabs

in

c o n d i t i o n s

a s s u m e

s e t t i n g

o f

criterion

this is t w o f o l d :

research),

f r o m

t h e

k n o w n

( B i r n b a u m ,

it

w h i c h

B l u e

p("B"

is

w i t n e s s e s .

t h e

o f

that

6.1

N e y m a n

n o t

a d d i t i o n

u s

o f

a n d p ( G )

W e

in

e q u a t i o n

A p p l y i n g

G r e e n

visibility

( R O C )

shift

in

"errors" possible.

e x c e p t

in

( H e r e

d e p e n d i n g

d o

n e e d

s u m

a c o n t i n u u m

p o i n t

t h e o r y

for

w e

t h e

p e r s p e c t i v e

u n c e r t a i n t y b u t

that

t h e o r e m .

B a y e s i a n

it

t h e

vary.

characteristic

u s

t o

o f

q u e s t i o n

s h o w s

as

a n d

sensitivity

m a y

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different

e x a m p l e

the

criterion

m o r a l

t o

in

this.)

a n o t h e r ,

s a m e

his

actually

lead

n i g h t

t o

if

e s s e n -

T o d a y ' s

c o n t i n u u m

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r a t e s p(B)

s e a r c h e d

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o f

u n d e r

o p e r a t o r

p("G"

Bayes'

situation

t y p e s

research.

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" G r e e n , "

is

as stated

t h e o r y "

o f

w h i c h

Bayes'

this c o n t i n u u m :

calculate

actually

h o o d s

o n

in

b e y o n d

subjective

criterion

criterion

base

p r o b a b i l i t y

t w o

several

i n c o r r e c t

g o

d e t e c t i o n

says

o n e

his

hypothesis

acutal

N o w

t h e

t h e

p s y c h o l o g i c a l

calibrated

b y

o n

analysis

minimizing

a

subject

f r o m

b u t

so-called

T h e r e

course,

o n

criterion,

t h e o r e m

r e p r e s e n t a t i o n

h i t - a n d - r u n

w a s

a

d e c i s i o n

Bayes'

"signal

w i t n e s s

criterion

P e a r s o n

o f

o r

t h e

t h e

t h e

229

n o n - e x i s t e n t

c r i t e r i o n is a p o i n t

side,

t e s t e d o f

t o

refer

t h e

mind

j u d g m e n t - u n d e r - u n c e r t a i n t y

analysis o f

n i g h t

w e

d i s t r i b u t i o n s

o n e

criterion

a n d

theory,

t h e

w i t h

P e a r s o n

subjective

o v e r l a p p i n g Recall

arises

r e a s o n i n g ,

P e a r s o n ' s

c h o l o g y ,

a n d

f o l l o w i n g in

statistics a n d

d i f f e r e n c e

of the

in b y

this

S e e n

a single pair

o f

in

f r o m

j u d g m e n t - u n d e r -

h e

curve).

t h e o r y

f u n d a m e n t a l

errors.

t h e

t h e o r y ,

R O C

p o i n t

is

characterized

F r o m

criterion

duality

in

thereof,

the

latter

shift

N e y m a n

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b e a n d

230

Statistics

P e a r s o n ' s logical e x i s t

t h e o r y :

p a r t . m a n y

m o r e ;

w h i c h

d i s s o l v e

i n t o

t h e

f r o m h a v e t h e

If

w e

a r e

m a t i o n

p a c k a g e d ,

t h e y

t o

r e l e v a n t

n o t

w h o w e

a r e

L e t

v a n t

b a s e

v a l u e , t h e

b u t , b a s e

f o r m a t i v e , t h e

o f

b a s e

s u g g e s t o n l y called

it

a

f u r t h e r

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close

d e r i v e d

r a t e s

W e

c a n

g i v e

c o n c l u d e

t h a t

o f

since o f

is

is

first

w e B l u e

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"causally"

" i n c i d e n t a l . " )

a n d

o f

t h a t

k n o w

t h e

t h e

l i n k e d

a b o u t

t o

H o w e v e r ,

is

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a

t h e

t h e

j u d g e

o r

as

i n

f o r

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for

g e n e r a l

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j u d g e s

t e s t i m o n y n e e d s

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t h e first

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t h e rele-

n u m e r i c a l

is r e l e v a n t . b e

a t

( K a h n e m a n o n

t h u s

o f

t h e

e x a c t

m a y

d e -

P e a r s o n ;

a c c i d e n t s

see

P r o b l e m .

a c c i d e n t

a n d

s h e

indis-

C o n s i d e r ,

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t h e

r a t e

w h e r e a s m a y

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E n g i n e e r ,

m i n o r i t y

b a s e

p u b l i c a t i o n

e v e n t ,

f o r

r e a s o n i n g

t h a n

t h e

o n l y

h i t - a n d - r u n

later

a n

t h e

N o w

b a s e

in a c c i d e n t s ?

t h e

t o

o f which

city? T h i s

f o r

t o p i c

r e a s o n i n g .

N e y m a n

n o t

w h a t

i n f o r m a t i o n

h i t - a n d - r u n

errs.

a

a b o v e )

o f

k n o w s

w i t n e s s

q u e s t i o n

t h e

in

S h e

c o n c e r n

i n v o l v e d r a t e

b e l o n g s

a b o v e ) .

H e r

in

s h e

t h e

e s t i m a t e

are, h o w e v e r ,

v e r s i o n t h e

as

t e r m i n o l o g y .

statistical

w i t h

p r e -

for,

a n d

r a t h e r

r e l e v a n c y o f

i n f o r -

" h e u r i s t i c , "

s h o w n

D u n c k e r ' s

r e a l - w o r l d

d e a l i n g

c a b s b a s e

in

a p p l i c a t i o n

t h a t

(as

o f

s u c h

t h e y

is

t e r m

o n l y -

already

s e a r c h

f o r

p e r s o n

t h e u s e d

c o n f r o n t e d

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a r e

as

n o t

a

p r o b a b i l i t i e s ,

j u d g m e n t s

place,

B l u e

n o w

is

c o n s i d e r e d

s e a r c h

t h e

issue

R a t i o n a l i t y

subject's

E v e n

it?

t h e

p r o b l e m s

rarely

u n c e r t a i n t y .

d i s c u s s e d

W h a t

t h e

r a t e

this

is

is

w o r l d ,

I n f o r m a t i o n

this w a s

B l u e .

d o e s

p r o b l e m :

t e x t b o o k

w h e t h e r

l i k e l i h o o d

rate.

-

t h e

a s s u m e

( s h e

issue

t h e

r a t e

j u d g e

in

o u t s i d e

v a l u e s

d o )

f o l l o w i n g

is

o f

d e c i d e

r e a l - w o r l d

t h e

q u a n t i t a t i v e

search,

a n d

e n t e r

w h a t

f r e q u e n c i e s

t h e

t h e

in

a n s w e r ,

calculation.

T v e r s k y

p e o p l e

h e u r i s t i c , "

s e a r c h

u s

a n d

t h e r e

b a s e - r a t e

(0.82)

b a s e

i n f o r m a t i o n

w i t h

w a s

o f

B a y e s i a n s

i g n o r e

w i t n e s s

it

p a r t

a n d

t o

i n f o r m a t i o n

t h e r e

s c r i b e d .

t h e

u s i n g

a n d

as

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b e g i n

c a b

i n s t a n c e ,

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this

p s y c h o -

c o r r e c t

a b o v e

e n t e r

t h a t

r e l e v a n c e .

k i n d

(if t h e y

v a r i a b l e s

I n f o r m a t i o n

for

W h a t

r e l e v a n t ,

c a l c u l a t i o n

p e n s a b l e

i n d e e d

t y p e

f o r m ,

d i d

o f

s e c o n d

n u m e r i c a l

t h e

s t r a t e g i e s

a

a n d

in

" r e p r e s e n t a t i v e n e s s tive

d o

t h a t

a

( a n d

s u c h

single

g i v e n

K a h n e m a n

o f

j u d g m e n t

o f

w h e t h e r

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i n t o

s e l e c t i o n

R e c a l l

it s h o w s

p r o b l e m s

i n t o

v a r i a b l e s

a p p a r e n t l y

b e c a u s e

a n d

P r o b l e m .

j u d g e

r a t e s

allegedly

s o l u t i o n

b y

s o l u t i o n s

p h e n o m e n a

t h e

(0.80).

b a s e

f r o m

r u n s

o f t e n

r e s e a r c h

0.80,

v i e w

C a b

t h a t

t e x t b o o k

s e a r c h

a b o v e

a l t e r n a t i v e

r e p o r t e d

t o

s u p p l e m e n t e d

a l t e r n a t i v e

1 9 8 3 ) ,

air.

T h e

b e

n e g l e c t e d .

l e a v e

o n e - a n s w e r

e x i s t

B i r n b a u m ,

e x a m p l e ,

v a l u e , c.

r a t e s

t h e r e

mind

m u s t

relative

a n s w e r

this

p a r t

d e f i n e d

a s s u m p t i o n

s a m e

t h e

t h i n

c h o s e n

b a s e

since

see

a r e

m e d i a n t h e

statistical

S e c o n d ,

n e g l e c t

t o

t h e

of the

v e r y

in-

n i g h t .

a n d

O r

T v e r s k y

g r o u n d s b a s e t h e r e

Is

t h a t

r a t e is

is

little

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Statistics

g r o u n d

t o

b e t

d i s h o n e s t y base

rate

t h e

for

t h e

All

their

o f

q u e s t i o n ;

their

application T h e

data

T h e

in

t h e

g e n e r a t i o n

t e n d e n c y

c o o k b o o k - l i k e

p r o b a b i l i t y

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randomly fact,

d r a w n t h e r e

t i o n e d l e m ;

t o

o u t

that

t h e

subjects

subjects

an

w e r e

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in

o r

notice, t h e

a n d

w e r e

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e a c h

i g n o r e

rates

( G i g e r e n z e r ,

disappears S u c h f o u n d ject.

if

t h e

results

in studies d e p e n d s

If t e x t b o o k

m o s t i g n o r e

indicate

o f

t h e

base

that o n

p r o b l e m s

t h e

h o w

are

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w h e n

as

d e s c r i b e d t h e

t o

W . "

o f

o f

that

p p .

is

t o

in

t h e

50,

base

c o m p l e t e l y s i m p l y

if care

a n

in

research,

subject T h e

t h e

w e r e

refer.

e v e n

the

m e n p r o b -

falsely:

e.g.

b y

o v e r

1988).

S m a r t

t h e

w o r d

subjects

l e t t i n g

t h e n

t h e

s t e r e o -

u n i n f o r m a t i v e .

that

I n

E n g i n e e r -

A m e r i c a n

s k i p

urn,

Bayes'

" m e d i c a l " In

esticlaim

(via

rates

b u t

t a k e n

t h e

t h e y

know

subjects

n o

Base-rate

l o n g e r n e g l e c t

explicit. o f

i n f o r m a t i o n

individual

t h e

is

Blank, m a d e

t e x t b o o k s .

is n o t

154).

m a t c h

m a n y

d e s c r i p t i o n s

t h e s e

a n d

q u e s t i o n

in

E n g i n e e r .

t h e

search

i n f e r e n c e .

t h e t h e

asserted, t o

b e h a v i o r a l

rate specified

s t u d y

"quality"

the

t h e

b u t

b e t w e e n

i n f o r m a t i o n

w h e r e

base

d r a w n ,

is

B a y e s i a n

parallels

t o o l s

is a n

w h i c h

d i s t r i b u t e d

K a h n e m a n - T v e r s k y rates.

s o m e

P r o b l e m ,

a n d

i n f o r m a t i o n

since

statistical m o d e l s ,

t o o l s

f r o m

Hell,

vari-

A n d ,

v a r i o u s

statistical

fact,

d e s c r i p t i o n

crucial

m e c h a n i c a l

less a t t e n t i o n

m a y

r a n d o m l y

t h e m s e l v e s base

I n

t h e

o r

m i r r o r e d

b e

o t h e r s

sift

c o r r e c t

is

1982,

t o

c o m -

w h a t

this crucial i n f o r m a t i o n

instructions.

d e s c r i p t i o n s

a n d

a s s u m p t i o n

o r

o f

t o

a s s u m p t i o n s

c o n s t r u c t e d

lawyer,

are

t o

s a m p l i n g

deliberately

o n e

m u s t

statistical

o f

Tversky,

r a n d o m

e n g i n e e r

m i g h t

a n d

p a r t

o f

a c c o u n t

" T o m

t h e

that

p e r s o n

t h e

t h e

j u d g m e n t .

w i t h

p r o c e s s e s

t h a n

p o p u l a t i o n

(e.g.

n o t

m u c h

t h e

crucial

t h e

Slovic,

P r o b l e m ,

o f

take

t h e o f

t h e

e x i s t studies in w h i c h

d e s c r i p t i o n s t y p e s

o f

at

probabilities.

t h e

crucial

l o o k

d e c i d e

c o n s e n s u s ,

m i n d

p a y

single

t h e

since

o t h e r s . S h e

a n d

a n d

that

relevant,

i n f o r m e d

t h e r e

E n g i n e e r - L a w y e r

o n

K a h n e m a n ,

L a w y e r

that

a b o v e

subjects s h o u l d

t h e o r e m )

t o

p r e s e n t a t i o n s

m a t e s

t h e

the

n e g l e c t

n e g l e c t

t h e

that

t o

o f

m i g h t

realize

o v e r

is n o

c o n c e r n e d A g a i n ,

t e n d e n c y

C o n s i d e r t h e

are

s t u d y

b e

variables

p o s t e r i o r

( m e a s u r e m e n t )

t o

t i m e

s h e

m a y

also

o f

i n c o m p e t e n c e

T h u s

g u a r a n t e e

application.

t e n d e n c y

its parallel

o r

it is a m a t t e r

different

t h e

c o u l d

t o w n

n o t

d r i v i n g

s h e

refer. T h e r e

d o e s

t o

b u t

r e l e v a n t

critical r e m a r k s

w i t h

scientists. has

part o f

rate s h o u l d

calculate

t h e s e

rather

o n e

etc.

231

c r i m e .

accidents,

night,

mind

b e t w e e n

h i t - a n d - r u n

o f

j u d g m e n t

will

link

p o t e n t i a l l y

this

i n f o r m e d j u d g e s

for

base

t o

in

t i m e

p r e f e r

i n f o r m a t i o n

s o l u t i o n

"causal"

h i t - a n d - r u n

t h e

m i g h t

a b l e ^ )

a

i n v o l v e d

t o w n ,

p a n y

o n

of the

probabilistic is p r e s e n t e d

b o o k l e t s t h e n

subjects

in

p u t

t o

t h e

c l a s s r o o m s ,

subjects are

r e a s o n i n g

are

i n t o

s u b as

likely an

in t o

e x p e r i -

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232

Statistics

m e n t a l

s e t t i n g

tion,

t h e y

are

h e l p

reconcile

w h e r e

less likely t h e

l u s i o n s "

r e p o r t e d

research

o f J e a n

r e a s o n i n g . o n i n g

t a k e n

c o s t

o f

t h e

child.

a n d

o n

adults

text,

s o

a n d

t o

m o s t

o n e

rational

m a y

m e c h a n i c a l l y

rational W e

s o m e

m i n d

is

p s y c h o l o g y b e g a n

t o

diversity sidered,

a n d

selective T h e

all, h a v e

a r c h e o l o g y M o r r i s o n g o v e r n

h i s t o r y

s h o u l d

k i n d

qua

first

tool,

itself

p s y c h o l o g y

a n d

a n d

c o n q u e r e d

C o w g i l l H e n k e l

application

E x p e r i m e n t e r s

u s

as

a n

r o u n d a

that

( 1 9 7 7 ) ( 1 9 7 0 ) . o f

c o n s i d e r e d

c o n t e n t

a n d

h y b r i d o f

t h e a n d

A

theory, o f

c a u t i o u s

j u d g m e n t s c o n t e x t .

utility,

c o n t e x t s .

A

w h o Bayes'

B u t

p r e s e n t a f e w o f

scientific

h y b r i d for

t o

o f

s u c h

a

e x p e r i m e n t e r s

t h e

t h e

is b y

m a i n a n d

social

b e

c o n -

here.

N e y m a n

e m p i r i c a l

b y

n o

a n d m e a n s

sciences,

as d o c u m e n t e d

a n d

d o u b l e

t h e

necessity

issues

w a s

s o c i o l o g y

G i v e n

d e c a d e s

a c c o u n t

a p p r o a c h ,

t o

e x p e r i m e n t a l

i n f e r e n c e

h y p o t h e s i s

subjects

in

Fisher's

M o s t

in

statistician.

t h e o r i e s

characteristic

statistics their

c o n -

statistician

a f t e r w a r d s

intuitive

o u t

e d u c a t i o n . b y

t h e

irrelevant

b e

s u c h

institutionalized

a n d

research,

non

as

define.

w a s

o f

-

a n d

m e a n i n g

w h i c h

all

t h e sine

b e e n

t o

in

Let

p r e s e n t e d .

b e

u s

intuitive

b e

c h i l d r e n

t h e

a n d

the

as

o f

t o

probabilistic

in

c o n t e n t s

o f

i n c o m p l e t e .

their

is

p r o b a b i l i t y

w a r n

against

the

a b u n d a n c e

o f

t o

m i n d

s e e m s

w i t h

c o n t e n t ,

s h o u l d

o f probability,

a n d

b y

t h e

T h e

a p p r o a c h e s

ideas t o

w h i c h

t h e

e x p e c t e d

i n d i s p e n s a b l e

at

a p r o b l e m

it

t o

e v e n

o f

( b e

all

p o s e d ,

j u d g m e n t

b y

u n is

o n

rather

u n d e r care

b o t h

o f

t h e

reas-

c o n v e r s a t i o n s

f o r m u l a

institutionalization

restricted

b u t

o f

a n d

w h e r e

subjects,

today,

-

t h e

j u d g m e n t

s a m e

statistics

t h e

-

n o r m ,

t h a n

that

a n

it

p s y c h o l o g i c a l

a n d

P e a r s o n ' s

n o t

as

o t h e r )

n a i v e

il-

probabilistic

a p p r o a c h ,

s t r u c t u r e

i n d e p e n d e n t

m o r e t h e

the

o n

casual

t h e

h o w e v e r ,

as

h a r d e r

s e e n

h a v e

i n t e r p r e t a t i o n

m u c h

c o n c e i v e o f

b e

t h e

m o d e l s .

m e t h o d

applies

o r

h a v e

t h e

b y

o n

crucial i n f o r m a t i o n

i n f o r m a t i o n

as irrational,

m i n d

t h e o r e m ,

w o u l d

in

that

m a y

" c o g n i t i v e

t h e p r o b l e m

a n d

available

s u g g e s t s

" n o r m a t i v e , "

f o r m a l

d e n i g r a t e d

in w h i c h

e v i d e n c e

o f

research

least

also

children's probabilistic

single-case

at

i n f o r m a -

u n c e r t a i n t y

( [ 1 9 5 1 ) 1 9 7 5 )

i n s t r u c t i o n s

n o r m a t i v e

a n d

a

t h e

u n d e r

c o m p l e t e l y

c o n d i t i o n e d

in

the

crucial

c o n s i d e r a t i o n

b e t w e e n

I n h e l d e r ,

uses

t h e w a y

p r e s e n t a t i o n

rates. T h i s

j u d g m e n t

t h a n

r e a s o n i n g ,

v i e w s

all its c h a n g e s

u s i n g

are

m u c h

n o r m a t i v e

"descriptive" in

P i a g e t

r e a s o n i n g ,

m a n i p u l a t e

I n h e l d e r

a n d

d e v e l o p e d

e x p e r i m e n t a l

is n o t

o n

B a r b e l

P i a g e t

b y

o r

c o n t r a d i c t i o n

n o n - s t a n d a r d i z e d

o f

a c c o r d i n g w i t h

t o

mind

feel,

base

child u n d e r s t a n d s

d e d u c t i v e

v a r i o u s

i g n o r e

a n d

Probabilistic

b u l k

see,

research

imply.

s t r o n g l y d e t e r m i n e d T h e

t o

t h e

b e t t e r

that e v e r y

t h e

in

P i a g e t

w o u l d

c a n

a p p a r e n t

A c c o r d i n g

is m u c h

certainty

t h e y

of the

o t h e r

t e s t i n g "rational"

a n d if

for

fields

s t a n d a r d

if

b y

c a m e

t o

i n f e r e n c e . t h e y

u s e d

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Statistics

Bayes' a n

t h e o r e m

t o

e n g i n e e r ) ,

P e a r s o n i a n d o u b l e logical. t o

their

h a v e

t o

s e e m

general,

e v a l u a t e

h o w e v e r ,

t h e y

statistics

In

b o o k s

test h y p o t h e s e s

b u t

s t a n d a r d

t h e m s e l v e s their

b e

m a i n l y

b e h a v i o r a l

o w n

laboratory,

in

effect

sized

years

(e.g. C o h e n ,

editorials a n d o f

F e g e r , the

t o

policies If w e

o f

state

for

t h e

p u t

o f

s o m e

t h e

statistics

d i f f e r e n t

E l e m e n t a r y r e c o g n i t i o n

in

P e a r s o n - W a l d

s c h o o l ,

tual

e s t i m a t i o n

a n d

a n d

i n d u c t i o n

c u r r e n t as

if

d o g m a t i c

o f

a n d

t h e

Zeitschrift

a d h e r e n c e

b y

r e a s o n i n g

b y

by

a

single

has

in

this

physics

a n d

a t t i t u d e

a n d

for

o f

p u b l i c

n o r m a t i v e

m u c h

F e r m a t ,

fication

T h e y

p s y c h o l o g i s t s

p r o b l e m a t i c a l H o w e v e r

h o w e v e r ,

b i o l o g y .

o f

o u r

o f physical a n d

chapter,

o n e

n u m b e r

w i t h

k n o w l e d g e ,

p r o g r e s s i v e

i n d e p e n d e n t

h a v e

editorial

b e e n

s e e n

eclectic

d i f f e r e n t

brain

f u n c t i o n s .

d i s c r i m i n a t i o n ,

the

o f

the

f u n c t i o n i n g , o f

p e r c e p -

P e a r s o n

statistician.

t h e

it

a n d

N e y m a n -

statistician,

K a r l

i g n o r a n c e

statistical

e m p h a -

earlier

a n

T o

s c h o o l , read

w o u l d

o t h e r s ,

t h e s e e m

a n d

by

s c h o o l .

v i e w

o r i g i n a t e d s t e m

f r o m

t o w a r d s v i e w

b e e n

a n d o f

in

c o g n i t i v e

a

tools.

their t h e

p r o c e s s e s ,

different T h i s

b l i n d

c o n s t a n t

m e a n s

a n d

N a t u r a l

h a v e

science

a n d

the

h a v e

that

l o n g

d o e s

for

t h e

discussed.

t h e

b e e n

n o t

in

peculiar

since

universal: has

t h o s e

a c c o u n t s

w e

o u r

d i s c u s s e d

f r o m

c h a n g e d

a l m o s t

k n o w l e d g e

w a y

tools,

s p o t s

as it h a s

t h e o r i e s

history,

statistical

p r o b a b i l i t y

objectivity. w h i c h

o f

biological p r o c e s s e s . T h e

i n t e r p r e t a t i o n s t h i n g has

o f

a Fisherian

a B a y e s i a n

in

t o

statistician

o f

A n d

C O N C L U S I O N

t r a n s f o r m e d

u n d e r s t a n d i n g

a

7).

non-significant

that

c o n t r o l

c o g n i t i v e

o p e r a t e d

6 . 7

P r o b a b i l i t y

o n

d u e

p i c t u r e

a statistician by

M o r e

t h e

( B r e d e n k a m p

d e t e c t i o n ,

c o n t r o l l e d

literature

t o

s e n s o r y

t e x t -

r e a s o n i n g ,

increasingly

f u n c t i o n s

t h e

m e t h o d s

c h a p t e r

w e l c o m e

errors

t h a n

s o m e

o f articles is

they

type-I

g e t

r e v i s i o n

h o m u n c u l i

that

this

o u t s i d e

Sozialpsychologie

c o g n i t i v e w e

as

causal

o p i n i o n

o f

1 9 7 0 s

significance.

statisticians

s u c h are

a n d

B a y e s i a n

(see

are

for

rather

territories

studies

fur

r e a s o n s

B a y e s i a n

d e c i s i o n s

that a c c e p t a n c e

achieved,

j u d g m e n t

p s y c h o l o g i c a l

e a c h

m e r e

h o m u n c u l i

statistics.

traditional

t h a n

v a r i o u s

m e m o r y

its

rather

t o g e t h e r ,

f u n c t i o n s

t h e

w a s

N e y m a n -

institutional

since

B a y e s i a n

inflation

1 9 6 2 ) .

a n d

d e s c r i b e d

a n d

T h e

a l t h o u g h

o f

significance

Fisherian

u s e

as judicial

explicitly

p e r s o n

rarely

p o w e r

t h e

t h e

still

a n d

o f

( M e l t o n ,

intuitive

w h e r e

that

c o r r e c t

rhetorical

o f

s u c h

size

1 9 7 7 ) ,

as

1 9 7 0 )

level

results

as

s u c h

o n

s o m e

233

h y p o t h e s e s .

scientists

c h a p t e r s

r e - e n t e r e d

u s e d

o w n

h y p o t h e s e s ,

e x p e r i m e n t e r ' s r e c e n t

mind

(e.g. w h e t h e r

test

t o

i n c l u d e d

has

of the

Pascal identi-

a

m o d e l

d e p e n d

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o n

234

Statistics

s e a s o n e d tive."

j u d g m e n t ,

P r o b a b i l i t y

p s y c h o l o g y , arrives

at

cally,

that

u n d e r

t h e

t h e

that

exist a n d

1 9 8 0 ) .

that

o f

o b j e c t i v e

k n o w l e d g e ,

v a l u e d

as

t e r m s b e

o f

o u r

science.

a

w a y

b y

t h e in

o u r

t h e

t o

a n d

s a m e

m a t h e m a t i c a l , m o d e l

sense,

c o g n i t i v e

v e r y

is

r e p r e s e n t

n a t u r e

m e t a p h o r , arbitrary

o f

a n a

illusion, p o w e r f u l like

a n d

h e n c e

t h e

m e c h a n i c a l ,

a n d

t h e in

reflect

o u t s i d e

o u r

o f

s o v e r e i g n t y capricious

o f

in

e s s e n c e

d e e p

for

c o m -

n u m e r i -

e v e r y t h i n g c o m p u t a t i o n

p u b l i c

m e c h a n i s m i n s u r a n c e

for is

b o t h

a c c o u n t s

a

a n d

m u c h for

p e r s o n a l

of'statistical o f

p e r -

o f

t h e

g e n e r a t i n g

c o m p a n i e s ,

d e c i s i o n s

in

i n d i v i d u a l

w o r l d

h e a d s

c o g n i t i o n

"objec-

k n o w l e d g e

w h i c h

idiosyncracies t h e

a n d

p e r s o n a l

b y

characteristic

p s y c h o l o g i s t s , t h e

for

p s y c h o l o g y

probabilities

partly

e s c a p e

t h e

a

mind

p r o c e s s e s

brains

Statistics

i m p e r i a l

c o m p r o m i s e d

in

t h e

" o b j e c t i v e "

t h o u g h

a u t h o r i t y

sense,

b e c o m e

subjective

T h i s

k n o w l e d g e ,

it

are,

a

that

t h e o r i e s

v i e w

s u n ,

in

h a s

m e a n s

C u r r e n t

t h e r e

( P y l y s h y n , sonal

w h i c h

t o

is,

t h e o r y

k n o w l e d g e

n u m e r i c a l . m i t m e n t

b u t

of the

h a v e

decision. l a w its

I n

c a n n o t

a d m i n i s -

trators.

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" Y o u

can't

fight

the

law

o f

averages."



G r o v e r

S n o o d

in T h o m a s

P y n c h o n

(1984,

p.

142)

7

rest

e n h a n c e d o f

m o r e

e x p e r i e n c e

255

b y

n u m b e r s o n a n d

this

h a s

b o o m

c r e a t e d

i n f o r m a t i o n p e r s o n a l

a n d

in

p r o b a b i l i t y

a n e w

k i n d

f o r m a l

j u d g m e n t .

N o t

o f

t e c h since

Numbers

236

P y t h a g o r a s

has

b o t h

a

b o o n

that

statistics

( m i s ) u s e d p o s i t i o n .

a n d

tivity

a n d

rules

o f

c a n

o t h e r

E c h o e s

L o n d o n

t o

r e a s o n s

for

o f

in

the

t o

t h e

States.

b y

e x t r a o r d i n a r y

p r o f e s s i o n a l

p e r h a p s

e v e n

w e a k n e s s

o f

elites. large

role

in m o s t

in t h e

o f

erally

b e e n

h a v e

t h u s

States. has also

d e c i s i o n

-

G r u b e r ,

b e

stratified

o r

t o

a p p e a l

o f

v a l u e s

clash

m a n i p u l a t e

a n d t h e m

is

o r

( 1 9 8 7 ,

p.

are e s t e e m e d

that

q u i t e

t o

t h e

fact,

political

2 8 7 ) .

T h e o f

elusive, their

-

recently,

in

f o r m a l ,

Its

role

p r o m i n e n c e e x p e r t s

plays

m o r e

p u b l i c

R u s s e l l

h a v e

g e n elites

U n i t e d scrutiny

p r o c e s s e s

a r g u e d

a

t h a n

has

a n d

that

t h e

traditional

e v e n

o b j e c t i v e

o f

as

m o d e r n t o

is

b u r e a u -

T e c h n o c r a t i c

decisions

subject

fields. m a t t e r

o t h e r

m u c h

t h e

M i l t o n

o f

e d u c a t i o n

o n .

facili-

entirely a

tests,

States

o f

M i c h a e l that

c a n n o t

a n

easily

b o t h

t o

a c c u s a t i o n s

o f

m a n i p u l a t i o n

in

t h e

o f

l e a d e r s h i p

t h e

d e g r e e

in

h a v e

s t r o n g

m e n t a l

d e -

e c o n o m i c

r a n g e

in

o f

m o r e

p a s s e d

a n d

T h i s

faith

analysis,

are

e v e n

c e n t u r y

institutions

o f

a n d

universities.

c h i l d h o o d

p e r c e i v e d

for

established

t r u t h

business, a n d

idiosyncratic

especially is

in

U n i t e d

risk

is a m a t t e r

w i d e ,

o f

in a w i d e

a b s e n c e

arbitrariness.

a n d

real

c o n s e n s u s

t h e

A m e r i c a n

t o

a n d

universities

implicit

p r e t e n s e

lead

o b j e c -

d i s c r e t i o n

institutional

o p p o r t u n i t i e s

q u a n t i t a t i v e

q u a n t i f i c a t i o n

statistics

o f

t h e

d e f e n d e d t o

an

early

o f

e x c l u d e

m a y

this

t o a w i d e r public.

at least until

at least

e x p e d i e n c y "

practical

are

in

s t a n d a r d i z e d

f r o m

T h e

a n d

a n d

at

m e t h o d s ,

A m e r i c a n

elites in t h e

o p e n n e s s

o n

a n d

o f

political

a

n i n e t e e n t h - c e n t u r y

t h e

o f statistics is n o t

m u c h

m u l t i t u d e

o f guidelines

capriciousness

in

a

b e l i e v e d

e x p l a i n e d

political

o f

h i g h l y

w r i t i n g

"absence

f o r m

w h e r e ,

e n c o u r a g e d

o f

authorities,

s e l e c t i o n

relative

w e a l t h

responsibility

E u r o p e ,

T h e

t h e r e

in g o v e r n m e n t ,

t h e

for

b y

has

i m p r e s s i v e

in

f o u n d

p r o b l e m s ,

s o

o f t e n

a b o v e

n a t i o n o f l e a d e r s h i p

n o t

s o

g r o u n d ,

statistical

m a t h e m a t i c i a n s

alternative

Statistics,

o f

p u b l i c i n f l u e n c e

reflects

said

impartiality

a p p l i c a t i o n a i m i n g

n o w

heard.

a n d

cratic institutions w i t h t o o l s

that

o p i n i o n

still

is

b e e n

s u p p o r t

it is t h e

the

has

are

p e r s o n a l

o n e

h i g h

Cle'arly

a n d

scientists

m o r e

statistical

are

o f

it

t h e y

parallel

e x c l u d e

t h e

If

their p r e t e n s i o n s .

bias, t h e

s e e k

practical

size

t h e a t t a i n m e n t

t h e

B o t h

this

r e a s o n e d

h o w e v e r ,

m e c h a n i c a l

a v o i d

a n d

e x p e r t s .

b e c a u s e

e x p e r t

B o t h

d e v e l o p m e n t

U n i t e d

this;

t o

great,

p r o v i d e

m u c h ,

e v e n

s o

is

e n c o u r a g e s

e x c l u s i o n

t h e

a p p l i c a t i o n

cisively

b o a r d

S o c i e t y

t o

m o d e r n

a n d

b e e n

that

t o o

e v e n

t h e

world

n e w - s t y l e

m e r e l y

bureaucrat.

t h e

Statistical

their

B u t

c l a i m

fairness.

o f

L e a d e r s h i p

tated

o f t e n

t h e

at

t h e

a n y t h i n g ,

c o n s i s t e n t

across

t o

n o t

o f

the

n u m b e r s

things,

m o d e r n

t h e

p r o c e d u r e s

in

p r o v e

that p e r m i t s ,

t h e

o f

t e m p t a t i o n

t e c h n i q u e s

e m p h a s i z e

fray.

a

If e x p e r t s

s y s t e m

t h e

p r e s t i g e

t o prove

social

a n d

t h e

rule

rather

pluralistic

n u m b e r s

o f

a n d

o s t e n s i b l e

t h a n

service

U n i t e d o f

k i n d .

d e m o c r a c i e s . t h e

States

W h e r e

t e c h n i q u e s

neutrality. W i t h

T h e

that statis-

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Numbers

tics,

h o t l y

d e b a t e d

issues

rule

c a n

the

world

s e e m i n g l y

b e

237

t u r n e d

i n t o

p r o b l e m s

t o

b e

m a t t e r s

o f

s o l v e d . T o d a y ' s daily

a p p l i c a t i o n s

c o n c e r n

t e c h n i q u e s in

its

a n d

reflect

t h e

a n d

d e v e l o p m e n t s t e s t i n g

n e w

e x p e r i m e n t s , o b j e c t i v e

o f

a

i n t o

as

in

p e r s o n a l

a r r a y

w h i c h

o p i n i o n

l a w

n e w

a n d

in

its o w n

a p p l i c a t i o n .

d o

a n d

t h e

l o n g i n g

for

t h e

r e m a r k a b l e

m e c h a n i z e d

c o u r t r o o m s ,

o p i n i o n

t h e

w h i l e

p o l l i n g

n i n e t e e n t h

t h e

c e n t u r y

m e a s u r e m e n t

m a d e

b e l o v e d o f

intelli-

trials

c o n t r o l ,

s t u d i e s .

c e n t r a l

a g r i c u l t u r a l

S u b j e c t i v e

in

a p p l i c a t i o n s

like

o f

p r e c i p i t a t i o n

a n d

a b o u t

w a s

T w e n t i e t h - c e n t u r y

r a n d o m i z e d

q u a l i t y

t h e

c o n t i n u e

Q u e t e l e t ' s

statistics.

t o m o r r o w ' s

it

r u l e s

h a s

-

n o t

success

i n

a n d

w e a t h e r t h e

p o s s i b l e

7 . 2

i n t e r p r e t a t i o n s ,

e x t r a o r d i n a r y

Statistics

is

h a s

i n d i d o w n -

t r a d i t i o n a l r e p l a c e d

t h e

t h e

v a l u e s

t h e

E

o f

W

t h e

O u r

rules.

w i t h

t h e

o f

e x a m p l e s e m p h a s i z e

w o r l d

like

t h a t

v a r i e t y

o f

daily

i n t e l l i g e n c e

i n d i v i d u a l i s m , w i t h

familiarly o f

a

i m p o r t a n t

s y m b o l i z e s , o f

i n

r a t h e r

n o t i o n s

f a s c i n a t i o n

n u m e r i c a l

b u t

m o r e

j u d g m e n t s

m a t h e m a t i c s

N

o l d

t h e m

u s e d

r e m a d e

all

flexibility

m o d e l i n g .

field,

h a s

r e d e f i n e d

m a d e

n o w

a n d

t h e

all its g u i s e s

It

t h a t o f

t h e

e x h a u s t

all reflect

c e r t a i n t y

a n d

m e a s u r e m e n t ,

t h e r e b y

t r a n s f o r m e d

n e w

e x p l a i n

i m a g e .

m e d i c i n e ;

v a l u e s ,

as

e x p e r i m e n t a l

t e c h n i q u e s

h e l p s

statistics

a n d

in

o f

a p p l i c a t i o n s

it h a s

i n t e r p r e t a t i o n

t o

f r e q u e n c y

c h a n c e

e i g h t e e n t h -

i n d u s t r i a l

c o n v i c t i o n

i n f e r e n c e ,

i n

b e f o r e ;

p a s t

o f

o f

play.

e x p e r i e n c e p u b l i c

t h e

m a t h e m a t i c s

p e a s a n t s .

p e a c e f u l l y

c o m p l e m e n t

a n

in

a n d

t o

w i t h

a n d

t h a t

h a v e

o t h e r

c o e x i s t

b o t h

d e s c r i p t i o n ,

w a y s

statistics

o f

t h e

full

m e t h o d s

m a t h e m a t i c a l

t h e r a p i e s ,

h o s t

r u b r i c

m u n d a n e

b y

s t u d i e s

f u n d a m e n t a l o f

t h e o r y

t h e

c o n t e m p o r a r y

w o r k e r s

m u c h

"statistics,"

m u l t i f a r i o u s

in

c o u n t a b l e

still

m e d i c a l

f o r m i d a b l e

-

is

i n f e r e n c e

w h e r e

c o m e

k n o w n

t h e

" m a s s "

f o r e c a s t e r ' s

T h i s

o f

t h e

a n d

u p o n

B a y e s i a n

s o c i o l o g i c a l

p r o b a b i l i t i e s

f o r e c a s t i n g ,

p o u r

in

d r a w

e i g h t e e n t h - c e n t u r y

o f

t o

p r o b a b i l i t y

a c c u m u l a t e d

h i s t o r y .

for

i n d e e d

a n d

citizens

a c o m e b a c k

d i s t r i b u t i o n

g e n c e ,

v i d u a l

m a d e

d i s d a i n

t o

n o r m a l

a n

statistics

t h e

a t t a c h e d

a n d

h a v e

d e s c r i p t i v e

w a y s

o r d i n a r y

i n t e r p r e t a t i o n s

l i n e a g e

rationality

t o

statistics

t h r e e - h u n d r e d - y e a r

c e n t u r y

t o

t o

o f

t h a n

e v e r

p a r t i c u l a r l y

N e w

objects,

n u m e r i c a l

a n d

p r e c o n d i t i o n s

f o r

u n c e r t a i n t y .

O B J E C T S

B a s e b a l l

B a s e b a l l g r u o u s s a n d l o t s

is a m o n g -

o b j e c t s a n d

t h e o f

m o s t

i m p r e s s i v e

statistical

-

b e c a u s e

m a t h e m a t i c s .

city streets, s u p p o r t e d

b y a c u l t u r e

T h e

s e e m i n g l y s p o r t

o f w o r k i n g

m o s t

g r e w m e n

i n c o n -

u p

f r o m

a n d

f a r m

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Numbers

238

b o y s , o f

i n f o r m e d

m a n a g e r s .

a n d

c a n

P a l m e r ,

b y

Y e t

t h e

n o t o r i o u s l y

statistics

e v e n

b e

1986,

p p .

t r a c e d 9

( M c K e a n ,

ff.).

tics

o f

t h e i r

t r a d i t i o n s a n d

b o t h

ball

Abstract.

s t o r y

is

h a v e

B o t h

o f

to

a n n u a l

t h e

m o s t

o f

Play

its It,

e x p l a i n e d

h o w

a

g a m e

n a t i o n a l

m e r

c r i c k e t

t e m a t i z e d this

" f r o m t h e

t h e

A s

t o

b y

w o u l d t h e

o r

hitters,

a n d

H e

l o b b i e d

i n g

e r r o r s

w o r s e p r e s s

t h a t

w i n n i n g p r e s s

h a d

o f

p l a y

o n

b a s e t h e

a r e

statis-

v e n e r a b l e cricket,

B i l l James

Base-

t h e

b a s e b a l l

d i d

g a m e . "

o f

as

sys-

c h a n g i n g

1868,

p .

w o u l d

12).

all,

t h e s e

baseball

in

h e

t h a t

statistics t o

e x -

h o m e ( p p .

r e a c h e d d i d

u s e d

w a n t e d

w a n t e d

" s h o w y "

clearly

p a r t l y

u s e d

C e r t a i n

t o

11).

b e

b e

d e p r e c a t e d

b a s e s

u p

statistics

C h a d w i c k

c o u n t i n g

g a m e

a g o

t h e

w i t h

t h e

years

A b o v e

o v e r l y

establish

"a

g a m e .

since

t o

c o n n e c t i o n

g a m e

H e

C h a d w i c k

d e v i s i n g

statistics

a n d

It,

for-

t w e n t y

(p.

Learn

A

t o

i.e.

g r e a t

E n g l a n d .

t h a t

latter.

c a t e g o r y ,

in

( C h a d w i c k ,

t h e

to

H e n r y

I n

o n

t h e

also a

a t t e m p t

i n t e r e s t s

r e c o r d e d ,

n o t ,

w a s

r u n

6 2 - 8 ) .

o n

n o t

field-

d e m o n -

66).

t e a m

hasty,

his

c r i c k e t

r e c r e a t i o n "

a v e r a g e s ,

m o r a l

loss o f

t h e

o f

t h e

a t e a m

loss p r o m p t e d

b e t t e r

b e t s

b e e n

u n c e r t a i n t i e s s o m e t i m e s

T h e

t h e

b i g

t h e

t o

a n d

How

1868,

s o m e

o f

w e r e

p r a c t i c e

p r o m o t e

i n v o l v e d

a

c o n c e r n e d

o t h e r s

r u n

t o

n o w "

i d e n t i t y

" m o r a l

p .

o f

it w a s

(literally)

t h e

(e.g.

t h e

rate,

b u t

Ball:

in

i n f l u e n c e

is

g a m e s

h o m e

b a t t e r s '

c o u l d

it

v e r y

a

s t o p

t h e

a n d

football,

t h a t

baseball

Base

o f

baseball

details

ball

o f

of

m o d e l

his

d e e m p h a s i z e ,

t o

skill

t h e

s o m e

t h e

, w h i l e

t h e

t o w a r d

r e c o r d .

o f

v i r t u e s

least

T h o r n a m e n a b l e

b a s e b a l l

r e c o u n t i n g ,

i n t e g r a l

e x e r c i s e

w a s

b e

b e g i n n i n g s ,

b e

a n y

a n d

p u b l i s h e d

w e r e

t h e

w h i c h

t o

h e n c e

Statistics i n s t a n c e

t h e

h a r d

o n

field

H e

t o

A t

o f

Wisdon

Game

It,

h a v e

g a m e

in

The

d i r e c t e d

p e r c e i v e d ,

g a m e

b a t t i n g

w o r t h

its

(see

c o m p l a i n

statistics

a r e

g e n e r a t i o n s

as A m e r i c a n

n e g l e c t e d .

t h e

his

U . S . ,

s i m p l e

s u c h

said

s p o r t s

e.g.

Teach

t o

c r i c k e t

b e e n

early p r o m o t e r s

statistics

b e g a n

t h e m .

at

I n

to

h e

real v i r t u e s

p u n g e ,

-

i n

f r o m

o f

p u r p o s e s .

r e c o r d i n g

w a y

p r o m o t e

r e f l e c t e d

s t r a t e

o f

t h e

n a t i o n a l

t h e

t h e

scientific

r e p r e s e n t

a r o u n d

i n f l u e n t i a l

f o r

C h a d w i c k

f o r m e d

o t h e r

b e e n

How

a l m o s t

m a n l y ,

t h e s e

s i m p l y

statistics.

h e

o t h e r s ,

a b s t r a c t s

r e p o r t e r ,

p u r s u i t ,

m a n y

w i s d o m

b a s e b a l l

h a v e

h a v e

baseball

p l a n

s p o r t s

o f

o u r

o f

a n c e s t r y

F a n s

f o r

and

p a r t

its

d e v e l o p m e n t s

e n o u g h

world

u n g r a m m a t i c a l

t o

t h a t

the

b e e n

T h e s e

d e v e l o p e d

h a v e

c h a m p i o n How

f a v o r i t e s

rich

O n e

1 9 8 2 ) .

h a v e

b a c k

statistical analysis in w a y s n o t

rule

h a d

" t h r o w n "

C h a d w i c k

p o o r e s t

g a m e s

o f

s o m e

g a m e

b e t w e e n

c h a r g e d : t h e

w h e n

w a y s

r e c o r d

f r o m

t h e

m a t c h u p

i g n o r a n t o f

a b e t t e r

a c c u s a t i o n s

s e c o n d

ball, a n d

w i t h

o t h e r

for t h e

" K n o w i n g fact least

t h a t

t h e

t o

as a

well. t e a m

w i t h

m e m b e r s t h e t w o

o f

p u r p o s e t e a m s .

n o t h i n g

t h o s e

a

t h e o f T h e

o f

s t r o n g e s t

e x p e c t e d , "

O n e

t h e c l u b s n a i v e

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Numbers

journalists

h a d

o v e r l o o k e d

m a t t e r

o f

c h a n c e

tegrity

o f

t h e

t h e

g a m e

(see

in

p p .

in

E r n i e

c a r e d

Lieb,

sort

w e

p.

6 3 ) .

E v e r y p a s s e d

m a i n l y

m a j o r

a b o u t

3 0 ) .

statistical as

t h e

u p

a

statistic o f

s i m p l y

n o

m o r e

t h e

a in-

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thinking

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s u g g e s t i n g 6 ) ,

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r h e t o r i c a l l y

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was

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test

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e r a s e

1 9 8 6 ,

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d e t e r m i n e d

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t h e

h a d

f r o m

t h e

c h a p t e r

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play at

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a n d

players

have

was

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1 9 7 4 ) .

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1 9 7 0 s ,

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justify

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241

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the

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r e m a r k a b l y

r u n s

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science.

e n j o y e d

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the shortstop's h e a d

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s h o r t s t o p ,

" p l a y i n g T h e

a n d

a n d

1985, p.

w h o

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p e r c e n t a g e s , " t h a t T h o r n

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in

5).

t h u s if

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t o

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coefficient"

unitary

b y W i l l i a m

o f

i n d e x

is p r o p e r l y

o f

W e c h s l e r

statistical a n d

-

a n

q u e s t i o n s .

c l o u d s

d e f i n i t i o n

T e r m a n .

o r

d e s c r i p t i v e

later r e n o u n c e d

b y

p o s s i b l y

a n d

intelligence

t h e

coefficients,

t h e

h e t e r o g e n e o u s

p s y c h o l o g y o g n i z i n g

m o r e

"statistical

p i o n e e r

m e n t o r ,

245

S p e a r m a n ' s g,

o f

t o

world

particularly

a c o r r e l a t i o n

l o o k e d

his

a

o r

the

a n d

a v e r a g e ,

T e r m a n ,

T e r m a n as

t h a n

c h a m p i o n

L e w i s

S p e a r m a n

a n d

t h a n

A m e r i c a n

States.

intelligence,

m o r e

d e v i a t i o n ,

c h o l o g i s t

b u t

as n o

o f

rule

a

e a c h

i 5

p u r e l y a g e

w a s

( W e c h s l e r ,

1 9 3 9 ) . T e r m a n

d i d

n o t

w o r r y

a c k n o w l e d g e d

that

h o m o g e n e o u s .

B u t

since

t h e y

m o s t

abstract, a n d a

n o t

mill

c o n c e p t u a l

h a n d

A l t h o u g h h a v i n g sisted in

o r

h e

that

A l r e a d y

o n

stress

o r

tests

test b e

o f

w h i c h

t h e

in

a test

a

single F.

N .

all called v a r i o u s yields

u s e

o f

t h a n

g,

m e a s u r e F r e e m a n ,

for

m a n y o f S.

i n c r e a s e d o f

a single

a b r o a d

s o m e o n e ' s

a t t e n t i o n

result

( R u m l , o f

a n d

is

p p . o f

traits, b u t g e n e r a l

a

year

a n d

c o n t e n t

firmly

b y

that

that

1 4 3 ) . E d w a r d

in-

c h a l l e n g e

character

t h e

as

level

" q u o t i e n t "

insisted

score,

1 3 1 ) .

g r a d e

H e n m o n ,

R u m l

as

age, a n d

s y m p o s i u m

B.

that

c h i l d r e n

t o

C .

t h e

129,

p r e p a r e d a

a n d

success

age.

particular

" s o m e

o t h e r s ,

m e n t a l

t o

o r

t h a n

d e t e r m i n e

o f

A .

1 9 2 1 , p .

d i v e r s e

intelligence

V .

strictly

w i t h

s p o k e

intelligence

I n

n o t

intelligences,"

c h r o n o l o g i c a l

c o n c e p t

C o l v i n ,

o f

1 9 2 1 ,

s h o u l d

H e

r e c o g n i z e

correlations

intelligence. S.

m u s t

p s y c h o l o g i s t s

q u a n t i t a t i v e

a v e r a g e

W e

their

t h e

is

p r o g r e s s ,

"hierarchy

l o w

latter

intelligence,

as p o s s i b l e "

e v o l u t i o n a r y

r o u t i n e l y

f r o m

this

a n d

realism.

i m p o r t a n t

( T e r m a n ,

o f

u n d e r c u t w e r e

metaphysical

aspects,

t h e

h e

t h e

r e p l a c e m e n t

t y p e s

as h o m o g e n e o u s

a t o p

m o t o r m a n "

rather

t h e r e

o f

society.

it yields

f o r m e r

o n

t o

s t a n d s

age, d i f f e r e n t

1 9 2 1

o f

a d v a n c e d

car

d i s t r i b u t i o n

m a n y

stages

" b e c a u s e

street

in

m e a s u r e

a n

t h i n k i n g

W e c h s l e r ' s

w a s w i l l i n g

h i g h e s t

issues

aspects are m o r e

m e n t a l

intelligence,

T h u r s t o n e

t h e

t h e s e

S p e a r m a n ' s

t h e

s t a n d a r d i z e d

o f

has

o p p o s e d

a g i v e n

s c h o o l .

this

s o m e

abilities

c o n d e m n

a b o u t

intelligence

r e p r e s e n t

useful

m u c h

L.

L.

traits, "in

a n y

s h o u l d

T h o r n d i k e d e n i e d

p o w e r

that

w h i c h

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re-

Numbers

246 sides

in

task"

h i m

a n d

d e t e r m i n e s

( T h o r n d i k e ,

1921, p.

rule

his

convention.

f o r m

the

R a t h e r

factor

it

analysis

ability

n o t

was

a

differently,

so

set o f perhaps

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s a m e

analysis

p r o p o s e d t h e m . (or

by J.

of

chapter R e a d

issue,

5). B u t

can

be

W h a t e v e r

m e n t a l

United

it

a n d

b o t h

g

-

influential. I Q deficiency,

preferred

n o t

a

according

m o r e

w e r e

n o t

t h a n

inferred

intelli-

I Q ,

to

the

o n e

often

the

has

1964, p.

that

used

in

the Russians

( W i g d o r

for

a n d G a r n e r ,

admission

fessional

schools

in

o f m u c h

criticism,

the for

influence

to

decide

U n i t e d

m e n t a l

constructs.

that

w h a t e v e r

w h a t e v e r

can

testing has

education,

its

alleged

colleges

association

in serving a n d

be

b e c o m e

c o m m i t m e n t

especially in

"secret w e a p o n "

States. Ability

1981,

516).

1982, vol.

selective

treat-

to

their statistical

a d d e d

o f

correl-

( G o u l d ,

d i c t u m

for

o r t h o g o n a l

impossible

statistician's

testing America's

w e r e

h u n d r e d

f r o m

g r o u n d s

a

s c h e m e

enthusiastic president o f the Educational Testing

w i t h

per-

points o u t in his elegant

reality o f

widely

to

to seven,

n o t generally

be

o f interpretation,

are

statis-

single

the P M A s

statistical

factorist

influential

it m e r e l y a

tests have quasi-legal standing in

a n d

called standardized

required

o n

( T u d d e n h a m ,

the difficulties

-

could

the

gave

and,

practice

" T o

it

to limit

P M A s

in the

the

T h u r s t o n e

fact give

S p e a r m a n

writes:

exist"

States. A n

its baleful

in

in

believed

once

are

is

measured,

m u s t

e n o r m o u s l y

did

t h o u g h t

intellectual

m o s t

abilities." These, a n d

giving

s e c o n d - o r d e r

T h u r s t o n e

'measured'

for

a

T u d d e n h a m

exists

o f

the

o f

for various special abilities, b u t

t h e m . A s S t e p h e n J a y G o u l d

this

b e t w e e n

capable

capacity

b e c a m e

that

impossible

since T h u r s t o n e ' s

i n d e p e n d e n t ) ,

m e n t

m e n t a l

it p r o v e d

P. Guilford,

M o r e o v e r ,

ations a m o n g

"primary

was

every

mistake.

a n d a range o f deviations

the

in

because h e

gence measure

real. U n f o r t u n a t e l y ,

world

126). T h u r s t o n e

critic o f the unitary I Q , t h o u g h tical

the

a n d

legitimating

tests

a n d

p r o -

the

eugenics a n d

an

contest

E T S

g r a d u a t e

testing has b e e n

w i t h

Service

in its

1, p . 9 5 ) , a n d

the

target

racism,

inegalitarian

or

capitalist

order. T h e r e f r o m

are,

T e r m a n

terpretation T e r m a n m u c h , o u t

to

it

m o r e

was

foolish for

A m e r i c a n

p r o v i d e d

A m e r i c a n

have than

for

the

to

favour

l o w

for

testing was

s e e m

could

parents

for

o r

W a r

language

T h e

(Kevles,

skills

as

in-

to

require.

never

achieve

teachers

closely linked

sterilization.

enthusiasts

a hereditarian

w o u l d I Q

I Q

o f "feeble-mindedness"

First W o r l d

English

criticism.

evidence

w i t h

sentimentality

g r o u n d s

such

t e n d e d

p e o p l e

evidence

in the

required

that

t h e m . I Q

stztcs

legal

recruits

clearly

reasons

fervor

suggested

any ambition

ations

g o o d

A r t h u r J e n s e n

w i t h

often

and

in s o m e

that

perhaps,

to

h o l d

to eugenics, in three

massive

a n d

gener-

testing

1968-69), using

well

as

a

o f tests

considerable

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Numbers

m e a s u r e

o f

nativist l a w s

p r o p a g a n d a

that

B u t h a v e

acculturation,

t h e

n e f a r i o u s

surely

rhetoric, scores

b e e n

( T e r m a n ,

o r d i n a r y

1 9 2 3 , p p .

p o i n t s

s t u d e n t s .

l e m s

o u t

W i t h

n i n e t e e n t h w a s

n e e d e d .

s t u d e n t s dary

e x i s t e d

w e r e

for

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w a y

regard

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t o

c a n

l o w e r - c l a s s

i n e d u c a b l e .

T h e

p r e v a i l e d q u i t e

t h e r e

o f

i n f l u e n c e

G e r m a n y .

T h o s e

for It

s c h o o l s

d i c t e d

w a s

e v e n

T h e T h e r e

" t o n e "

b e c a u s e

W a i t e s ,

1 9 8 1 , u s e

s e e m

w o r k i n g - c l a s s

o f o f

p p .

o f

t h e

t o

s t u d e n t s t h e

their

b e

d o

b a c k g r o u n d s

results tests

o u t J e w s ,

m o s t

in

t h e

U n i t e d

c h i l d r e n

Intelligence

w i d e s p r e a d ,

a l m o s t h a v e t o

b u t

this.

a d m i s s i o n s ,

a n d

b e e n

used. a n

f r o m

a p t i t u d e

universal,

i m p o s e

b u t

e n d

h e l p

o f

t h e

learning

p r o b -

tests h a v e

rarely

as

alternative

as

e d u c a t i o n a l

e v i d e n c e

s y s t e m

o f

that s e c o n -

test

results.

In

test-

fact,

States, p e r h a p s

m u c h

less

districts in

s o m e w h a t that

G r e a t

scholarships

t e s t e d

a n d

Britain

b e t t e r

intelligence

b e -

c l a s s - b o u n d

t o a w a r d

p o o r l y

States

a p p e a r e d

in

1 9 2 6 ,

it

s o o n

a n d

t h e

t e s t i n g

intelligence

m u l t i p l e - c h o i c e

t o

has

o u t s i d e

is

C o l u m b i a

elite c o l l e g e s w e r e

T h e

t h e

t o

W a r

( S u t h e r l a n d ,

was, o f course, n o t h i n g equivalent

s c h o o l s .

California.

W o r l d

a d m i t t e d ,

m o r e

intellec-

S e c o n d

w a s

o n

t h e m

t h e

t h o s e

reliance

I Q

o p p o r -

for

"attain-

tests

that

that

t h e y

t o o

w o u l d

t h a n

their

tests

1 9 8 4 ;

also

E v a n s

p r e a n d

1 0 6 - 8 ) .

t e s t i n g

c h a n n e l e d

d i d

b e

British

U n i t e d

t h e r e

t h a n

o r

t h e

p r o v i d e d

w o u l d

s c h o o l ,

m e n t a l

their

u s e d

m u c h

scores

e x a m i n a t i o n s

h a v e

against

ability

that

e d u c a t i o n a l

1 1 +

c h i l d r e n

a r g u e d

w o r k i n g - c l a s s t h e

tests in

at

w i t h

n o t e s

after

t o

is

c l a s s - b o u n d

i n

o r

intelligence

s c h o o l i n g

test

until

i n d e p e n d e n t

far its g r e a t e s t

o f t e n

as

t h o r o u g h l y

s t u d e n t s

in interwar

e v e n

m e n t a l

testers

anti-egalitarian

A s i a n s

a n d

admissions,

Gillian S u t h e r l a n d

o f

i m m i g r a t i o n

d i s c o u r a g i n g

c h i l d r e n

c h i l d r e n

l o w

his

o f

a n d

b e

i d e n t i f y i n g

part

intelligence

tell

m o v e

universal

selective

i n t e r p r e t

that

o f

t o

fear

a reactionary

t e s t i n g

n e w

d e s p i t e

w o m e n

in E n g l a n d

m a n y

plish

m e n t a l

h e l d

e d u c a t i o n

m e n t . "

a r m y

h e

a d v a n c e d

tunities

t h e

a n d

t h e

not

for

t h e

b e c a m e

E u r o p e a n s . o f

b o o k

t o

g r a m m a r

that

1 9 2 3

t o

east

T e r m a n ,

a d m i s s i o n

u s e d

r u i n

In

n o t

b y

a

hardly

s o m e

r e a s o n s

e x e r t e d

cause

t o

d i d

E v e n

in

247

results w h i c h

a c h i e v e m e n t s

i n t r o d u c t i o n

against

e d u c a t i o n

t h a n

-

o f d i s c r i m i n a t i o n .

authorities

i n g

that

century,

a n d

c i r c u m s t a n c e s ,

m e n

world

c o n t r i b u t e d

s o u t h

a n d

2 4 - 5 ) ,

t h e

d i s c r i m i n a t e d f o r m s

a i m s

the

d u b i o u s

h a v e

against

teachers

tually equal t o w h i t e G o u l d

m a y

e x a g g e r a t e d .

c o u n s e l e d

u n d e r

p r o d u c e d

a n d

d i s c r i m i n a t e d

rule

b e e n 1 1 +

t h e in

test

i n s p i r e d in

f o r c e d

Scholastic g i v e n

u p p e r

t o

t h e

1 9 1 8 , t o

find

closely

e x a m i n a t i o n

s c h o o l s

difficult w a s

less

classes has

b e e n

in

t h e

T e s t ,

e x t r a o r d i n a r y

technical

a b o u t

results

h o p e s

Britain

e x t r e m e l y

o f

o t h e r w a y s

A p t i t u d e

in

t o

g e n e r a l i z e b y

s t u d i e d .

h o w

o f

the

s c r e e n i n g t o

for

a c c o m c o l l e g e

diversity

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a n d

Numbers

248

decentralization is

probably

the

or

system,

classes

T h e

a n d

certain

n o t

It

c o n t e x t

o f

h o p e d ,

possible,

at

frame T h i s

is t h e

studies, inspiring h i m legerdemain,"

n u m b e r s

E c o n o m i c

for

w i t h o u t

together

to

probabilistic the

f r o m

ways in w h i c h p e n d

an

exact

is

practical

character

w h e n

has not, science, of

to

the

w h o s e

E. B. W i l s o n

the p r o p e r

o n precisely h o w

a b o u t

o f its

just

founim-

measurement,

1984, a n d

have

in

the

rivals that

have p.

at

229).

being

a

a

index

o f the value o f the

less

o f

that

go

unit

o f

n u m b e r s

o f statistics, less

flood

measured.

c o m m o n

E d g e w o r t h

might

Because

o f I Q , have

b e c o m e

1880s, Francis

c o n c e i v e s it. O n e

1932).

A l t h o u g h

century

"statistical

c o m p o n e n t s

least

manipulation

this

is

the

medical

to p r o d u c e

w h a t

remarks,

n u m b e r s

In

the

has p r o v e n

certain

(Wilson,

it is p o s s i b l e

clearly

D u n c a n

m e a s u r e

o n e

p u r p o s e s

influence

collection

t h e m .

firmly

Certainly

statistical

abstract

p r o m i n e n t

analyzed

currency

the

m i g h t

de-

see the value o f g o l d

a real entity, u n d e r l y i n g all c o m m o d i t y p r i c e s a n d i m p e r f e c t l y i n d i c a t e d t h e m ,

b u t

n o t

reducible

to s o m e

function

best m e a s u r e

o f the value o f gold

according

the

v o l u m e . by

to

If,

o n

definition

than

o t h e r w h a t

t h e n

it

the

o f

w o u l d

their

hand,

the

can

buy,

price

o f

prices value

o f these prices. In w e i g h t

o f gold

m e a s u r e d

grain

calculation

should

o f

n o t

than

s o m e

be

w e i g h t e d

to the

index

n u m b e r s

n u m b e r that

it

merely

m e a s u r e

almost

entirely

t h a t it

b e

s o m e

l o n g - h i d d e n

entity

their

identical o v e r

m o r e

quantity

stable, unbiased,

to

as

average

pragmatic;

the

c o m m o d i t i e s

is c o n c e i v e d

by

all

highly

c o n s u m e d

1920s, m a d e h e

as by

that case

according

1888-90). Irving Fisher, writing in the early

the ideal index like,

these other

rather

that o f pineapples precisely in p r o p o r t i o n

( E d g e w o r t h ,

the

the to

c o m m o d i t i e s ,

stability

a

intelligence.

indirect,

( D u n c a n ,

advis-

m o r e

as s o m e it

for

intelligence

in.

for

measure,

use

a b o u t

b r o u g h t

tradition

a n n o y e d

i n d e x

the

o f

intelligence

defining

considerations

discussion

genetics

o f

D u d l e y

u p

m o n e y

plainly derive

in

Otis

m a k e

m e a s u r e m e n t ,

debates

is o f t e n

ever

a

"intelligence,"

designed

give

p r o p a g a n d a

n u m b e r s ,

this looseness. A s

the

t o a s s e r t t h a t critical analysis is b e t t e r t h a n

except

index

are

h o w e v e r ,

Galtonian

that

statistical m e a s u r e m e n t o f

tests

their

theory

weakness

change

w i t h

psychology

a convincing

testing

"legitimates"

aggregate

is o n l y p a r t l y o v e r c o m e

the

it

m u c h

m u c h

of m e a s u r i n g

least w i t h i n

n o t

respective

quantitative

r e n d e r e d

standardized

Perhaps

h e t e r o g e n e o u s

t o o

does,

elusiveness, w h i c h

statistical m e t h o d

to

their

does

system,

universities.

the

interfered

admissions.

g r o u n d e d

ders

selective

that

world

1982).

it e v i d e n t l y

of defining

the

States school

(Resnick,

b u t

"aptitude,"

has evidently ing

U n i t e d

entering

difficulty

even

the

inevitable

hierarchical o f

o f

rule

the

required

reversible, (Fisher,

o f a n d

1911,

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Numbers

1 9 2 7 ) .

In

c o n t r a s t

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-

I Q ,

in particular,

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m e a s u r e m e n t s u m e r

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t h e

w h o l e s a l e

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price

decisions,

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lated

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t h a n

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M o s t

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e c o n o m i c

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a n d

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that

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statistical

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R e s p o n d e n t s t h e y

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I Q

o p i n i o n

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in

its

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c o m p u t a t i o n s . "the

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ability

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w i t h

d e p e n d e n c e clinical t h e

o f

e n h a n c e d quantified. E l m o

o n

s e n s e

case

in

t h e

in

I Q , t h e

first

t h e

s a m e

t h e

statistics -

p i o n e e r s

w o u l d

h a v e

t h e

o r h e r e a n d

o f

least

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in

calcu-

s q u a r e s

are

attentively t h e s e

t h e

t h e y

o n

b y

n u m b e r s ,

t e n d e n c y

m e a s u r e

issues

a l w a y s

t h e

o f

t h e m .

a b o u t

are

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socially

w h i c h

o b l i g e d

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t o

poll-

p u b l i c

c o n s t r u c t e d ,

o f

d e -

p u b l i c

t h e

a

for

large

( B e r n a y s , o f

f o r m e r

1 9 2 3 ,

like a n d

c h a m p i o n

better

t h a n

actuarial

a n d

s a m p l e s .

o v e r

w i t h

a

p p .

t h e

G e o r g e

d e n i e d

b e

s a m e o f

5 3 - 4 ) .

t h e

w i d e

m u s t

probabilities o f

d r e w d u r i n g

d e v e l o p m e n t

n a t u r e

s a m p l i n g ,

a

w h i c h

a n d

s a m p l i n g

t h e

r e c k o n e d .

w h i c h

scale

ability

t h e

statis-

tact as a

s u r v e y s

self-criticism

s t u d y

scientific

o f

political

p r o p a g a n d a

c o n s u l t a n t

o n

r e q u i r e d

b e

w a s

m e d i c a l

specialized

c h a n g e d

s e c o n d e d

s a w

u s e f u l n e s s

s u r g e o n " t h e

o f

a

b a s e d o n

enterprise,

success

relations

a

b e e n

c o u l d

L. B e r n a y s

1 9 2 2 ) . H e

is

that

that

reactions

has

o f p o l l i n g

o n e

E d w a r d

t h e

are

o p i n i o n

a d v e n t

b e c a m e

p u b l i c

area

that

d o c t o r

as

set

p u b l i c

p a i n s t a k i n g

e x p e r i e n c e

t o

a p p a r e n t

g r o u p

p s y c h o l o g i c a l t h e

clearly

a l m o s t

o r

g e n e r a t i o n

d e n y

e s t i m a t e

c o n -

different.

o p i n i o n s

h e l p

L i p p m a n n ,

n o t

o f

u n i q u e

m a n y

t o

t h e

a n d

n u m b e r s

W i t h o u t

q u i t e

w h i c h

s t o c k

w a t c h e d

m u c h

a n d

p i o n e e r s .

i m p o r t a n c e

T h e

R o p e r ,

t o

a n d

w i t h

p r o f e s s i o n a l d i d

for

it also

f r o m

(see

are

n e v e r

r e p o r t s

rates,

a k i n

m o r e as

R e v o l u t i o n ,

t h e

r o u t i n e

has

m a n u f a c t u r e d .

c e n t u r y ,

inspiration

t h e

b e i n g

t o

e v e n

i n v e n t e d ,

w i t h , a n d

o u r

in

i n d e x

t h e y will o n l y partly agree. I n addition,

b e

F r e n c h

relations

for

t o

o b v i o u s

First W o r l d

m o d e l

B u t

the

t o

all

-

b y

o p i n i o n

m u c h ,

w i d e l y ,

said

r e c k o n e d

tical s a m p l i n g T h i s

b e

at least

t o

w h i c h

case

s a m p l i n g ;

officials.

a s k e d

t h o u g h t

w i t h

i n v o l v e

p h e n o m e n a

o f t e n

b r o a d c a s t

c o m e s

Since

are

a

are i n d e x

s o m e t h i n g

displays

s h a p e

polls

a n a n s w e r

If

f o r c e

t o

t o

results

bate.

p o l l i n g

m e a s u r e d

currency

is

interest

a n d

P u b l i c

P u b l i c

this

N o r

g o v e r n m e n t b e

the

t e c h n i q u e s

results,

w o u l d

o f

m e a s u r e d ;

statistics

d i v e r g e n t

investors,

deflation

affect

s o

249

t h e p h e n o m e n a

p r o c e s s

a n d

world

results,

indices

prices, i n v e s t m e n t respect.

a n d

p o l l i n g

o n

the

reality o f

inflation

L i k e

b a c k

rule

t h e

A s

-

in

b o t h

o p i n i o n G a l l u p

t h e

it a n d

latter,

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for

Numbers

230 they insisted that tunity

to

m a k e

designed people could

to

thus

p r o v i d e a n d

be

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key

this was

to

the

largely w o r k e d n e e d e d

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a

admirer

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ferent

the

the

T h e

Institute

Archibald

l o n g

w h i c h

to

the

decisions,

the

public

and

unless

o f

the

w h o

better

than

R o p e r

studies, have derstand

to

1940, p.

they

w e r e

m a t h e m a t i c s

as

o n

the

the

A.

research, w h i c h t o o k that

the

color T h e

goes

to convince influential,

o f

for political

longer shape

find

or

s o m e

for

as m u c h

price

and

o p i n i o n

polls,

to manipulate

dif-

poll-

o f

o f

those i m p o r -

learning

like

public

to

see

opinion

a n a l o g y is like

to

success

those

w a y

1940, pp. 332-3). T h e

anticipate,

expect

m a k e s

research

1901).

i m p o r t a n t

business. I should

m a r k e t

per-

their roots in a

b e c o m e

n o w

can

the

and

h a d

size o r

o f

K i a e r

theory o f sampling

n o

public

o u t

N .

a n d

h a d

could

or

theirs

Marshall

this as a m o d e l

it

b u t

conjec-

1980; also Bowley,

Crossley, h o w e v e r ,

s o o n

director

M o r e

o f

334).

possible

saw

h e was unable

Mosteller,

a m a n u f a c t u r e r

be used

soundness,

e v e n

m a r k e t i n g

the p u b l i c as t o

un-

it.

Gallup,

R o p e r ,

vaulted into T h e

Digest

lists

o f

w o r k e d

c o m e

w h o s e

the time o f Laplace,

viability.

w r o t e

. ." ( R o p e r ,

could

distin-

objective opinions

statistical

its

a n d

principles

research to g o v e r n m e n t .

intellectually

Bowley, a s t u d e n t o f Alfred

purchased.

the public wants, h e application

o f

learned

public

H a d l e y

probability

w h a t

t h o u g h

1930. R o p e r a g o

t h o u g h t ,

w i t h

o p i n i o n

a v a i l a b l e since

N o r w e g i a n

(see K r u s k a l

by

agreed

R o p e r ,

public

they

old political arithmetic, insisting that

of Francis E d g e w o r t h ,

Gallup, a n d

society,

n o t

century. T h e

w h a t

w o u l d

"the m o r e

m a d e

o f

o u t

o f issues. Polling

sense,"

also

find

w h i c h

R o p e r

t h o u g h

230;

to

carefully

t h e m ,

mass

a n d

e s c h e w e d

the e c o n o m i s t A r t h u r

dictating

w h a t

p.

b e e n

a

c o m m o n

that

use of sampling, m a r k e t

things tant

o f

Statistical

"Business

while

1944,

sampling

facts.

large corporations ing:

G a l l u p

individual,

statisticians

it e x t e n s i v e l y

R o p e r ,

thing.

in

o p p o r -

sampling,

h u n d r e d

variety

d e m o c r a c y

citizen an

the pollster

several

extraordinary

1890s to use sampling,

International

used

an

(Cantril,

o f

Probabilistic

just

o u t in the twentieth

science

haps, was

heard.

" h a r d - h e a d e d

speculations

b e g a n in the

to give the average

contacting

a g o o d

nineteenth-century

was

by

to estimate error h a d

tures a n d

world

b y its a c c o r d a n c e w i t h

experts" m e t h o d s

the

all g r o u p s , p e r m i t t e d

average

h a p p i l y , is a t t e s t e d

T h e

voice

vigorous

possessed

realistic

her

for

surely

that

guished,

his

thinking

the

Cantril

theirs was the w a y

represent

w e r e

rule

the

h a d

Crossley

limelight b e g u n

potential o u t

and

in

g o t

1936

c o n d u c t i n g

subscribers

for

reasonably well in the

their

start

as a result o f presidential its first

sampling five

in

the

1930s,

t h e Literary straw

w e r e

Digest

polls

in

population.

attempts, a n d

a n d

1916,

Its

fiasco. using

polls

h a d

at least g o t

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the

Numbers

w i n n e r

right,

ness.

J u s t

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Literary

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air

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f o r e c a s t

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b o t h

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t h e

t h e y

1 9 3 6 ,

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c o i n

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t h a t

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off"

a n d

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n o t o r i o u s l y ,

l e a r n e d

in

d i d

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1 9 3 6 . G a l l u p

a n n o u n c i n g

v i n d i c a t i o n

a n n o u n c e d

W e

Digest,

feel

w e r e

T r u m a n .

e r r o r

a d v i c e

political

p p .

available

c o m p e l l i n g

" h a v e

h a v e

his A m e r i c a n

d e f e a t

c a u t i o n a r y

g u e s s e r s ,

w h o

t h a t

p r e d i c t

1 9 4 0 ,

s m u g -

e d i t o r s

d i v i d e d

k n e w

o f

freely

m i l l i o n s

fail i n

t h e

t o

R a e ,

w e

o n e ,

o f

T h e

t h e

G a l l u p

a b l e

1948, w h e n

t o

t o

w a s

s o

6 ) .

p o l l i n g

h e

a n d

p .

w e

fact

m e a s u r e

infallibility.

a n d

t h a n

s e p a r a t e d

p i e c e

p e o p l e

stratified

H e n c e

s m a l l

critics s e c o n d o f

in

n o

b e e n

w h e r e

likely

a c k n o w l e d g i n g

c o n c e i v e :

a f f i r m

a

a n d

late

o n l y

B u t

m a r g i n

D e w e y

b u t

also

g a p

p o o r .

a b o u t

just

w a s

o n .

( G a l l u p

o n l y

release

s o

w i d e

t h e i r

m e t h o d ,

b u t

a w i d e

t h a t

o u t c o m e ,

c l u d e d

a

u s

h a s

L a n d o n ,

m o n t h s

7).

affluent,

t h e

careful

p r e s s

p .

p o p u l a t i o n ,

f o r t y

p o l l

t o l d

t o

1 9 3 6 ,

" H o s t s

f e w

Digest's

status, a n d

w o u l d

a

1 9 3 6 ,

relatively

r a n d o m

i n

3 1 ,

called

251

this

claims

w h i c h

f o r

h i n d s i g h t :

h a v e

14,

t h a t

v i c t o r y

world

q u o t e d

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a c c u r a c y '

the

d i s p l a y e d

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m a k e

T h e y

p o l l i n g

N o v e m b e r

t h e m

o f

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result.

a b o u t

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a s w e e p i n g

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t h e

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t h e

' u n c a n n y

b y

s c o r e

1 9 3 6

year:

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p r e d i c t e d

m o r e

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b e f o r e

p h r a s e

p o l l s "

a n d

rule

o f o f

his t h e

p e o p l e , "

t h e s e

c h a n g e s

p r o f e s s i o n

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V A L U E S

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G N P ,

n u m e r i c a l ,

solidity

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in effect,

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t h e i r

t h e

vitality

I Q a

c o r r e s p o n d s

h a d .

t o

t h e

c o m m o n

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also

as m e n t a l

a n d

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d i s t r i b u t i o n e v e r y d a y

if v a g u e

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o f

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q u i t e t h e

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as

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"in-

Numbers

252

telligence."

M o r e o v e r ,

e d u c a t i o n a l

p a t h s

b e

e v a l u a t e d

less m a i n l y s y s t e m o u t

t h e m

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( B o u r g u e t ,

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studies

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w e r e

Statistical

p u r p o s e s : G r a h a m

s t u d y

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a n d

1984,

1 6 2 - 8 0 ;

p p .

T h e

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t h e

for

s u r v e y s

a l m o s t is

is

m e t r i c s , "

their equal.

as

T h e

T o t o

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u s e s

t o

s u p p o s e i g n o r e

o f

m u c h

t h e y t h e

g u t

m o s t

are s p a r k

the

s u c h

is

n o t t o

o f

t h e

o f

t h e as

r e d u c e

t h e

originality

o r

t w o

science

o f

stereoreleased

(see

B u l m e r ,

individuality, intellectual strikingly

since

polls

rational

t h e

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t o o

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a c a d e m i c

t o

c o m -

" s c i e n t o -

p u b l i c a t i o n s o r

its a n d

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t h e m s e l v e s ,

university,

o r

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for

b o o k s ,

scholar

that

for

t o

b y

a n d

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in

field,

are

all p a p e r s ,

o f

m o s t

rather

scholars

a r g u e d ,

n o t

largely b y

individual,

a

w i t h

1 8 2 - 5 ) .

intellectual

o f

u s e d

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attitudes,

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t h e

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in

p r o m i n e n t

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in

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253

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scientists

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1 9 2 0

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world

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l o c a t e d

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w o m e n ,

sociological

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s o m e t i m e s

m a t t e r s

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character

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a n d

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T h e

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t o w a r d

ascertain

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subjects

just as T h u r s t o n e

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p p .

as

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t o

p r o b a b i l i t y

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also

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life.

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soldier's

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et

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attitudes,

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" n o t

t h e y

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o p p o r t u n i t y

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t h e

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d u r i n g

t h e

a n a l o g i e s

h a d

o r

a t h e

e v e n

o n ,

b e c a u s e

recruits

t o

( 1 9 8 5 )

policies

-

like

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for

w i t h

character

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d u r i n g

t h o u g h

t h e

m e a s u r e m e n t

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that

b y

c y n i c i s m

S t o u f f e r ,

factors

traits

soldier

t h e s e

just

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o r

t h e

w e n t

e x p r e s s

n u m b e r

attitude,

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analysis.

c o n t e n t

identify

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a r m y .

as s u c h

h e

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rather

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w i t h

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p l a c e

b a c k

3 6 0 ) .

5 3 7 ) .

b i g

a n d

u n l i m i t e d

p e r s o n n e l

abilities

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as

its

later,

b u t

rather

5 3 1 - 2 ,

c h e c k

v a l u e d

i n c r e a s i n g

factor

p r i m a r y

m e n t a l

T h i s ,

w h o

h e l p

w a r

o p i n i o n s , "

p e o p l e p p .

p.

o f w o r d s

b u t

social science

t h e

h i g h l y

w i t h

t o

t o

and,

b y

A t t i t u d e

T h u r s t o n e ,

w a s

t h e

string

t e s t i n g h a d

b e e n

s t u d e n t s

h a v e

t h e m s e l v e s .

h a d

1 9 6 7 ,

as it stands,

r e c e i v e d

virtually

m o r e

war.

t o

u s e

a

e n t e r i n g

c o n t e n t

t h e

1 9 2 7 - 2 8 ,

o f a nascent

e n c o u n t e r e d

t h e

o f

life

e n j o i n e d

o n

p l e a s e d

d e a l i n g

world

( F l e m i n g ,

in

c o g n i t i v e

a i m

a r m y

o n

w a s

p r e v i o u s

t h e

t o

t o o l s

lost

their

tests

u s

s e n t e n c e

b e

s y m b o l s

I Q

practitioners

p a t i o n

t h e

the

really t h e

just as intelligence

h e r e

a d a p t a t i o n

their

o f

m e a s u r e m e n t

a r m y

officers;

u s is n o t

( T h u r s t o n e ,

W a r ,

like

a m i s t a k e

"shall

o f

o r

A t t i t u d e W o r l d

p e o p l e

m a d e

m e a n i n g

speaker."

marily

w i t h

interests

i m m e d i a t e t h e

n o t

rule

o n l y

T h a t

h e

s o m e t i m e s

o f

attitudes

probabilistic. attitudes.

A s

T h e w i t h

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Numbers

T h u r s t o n e , t h o u g h t , t h e s e

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t o

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1 9 5 0 ;

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s o c i a l r e s e a r c h e r s is less d e c i s i v e

t o

a b o u t

255

n o n - r a t i o n a l

a p p r o a c h

t h a n

world

c o n c e r n e d

c o m p a r a b l e their

the

Lazarsfeld,

n o t e , w a s

w h e t h e r

r e c o u r s e

m a t i o n

1 9 5 0 ;

m a y

w a s

a n d

n o t

unarticulated

their subjects

G a l l u p

is

( S t o u f f e r ,

military.

enlisted

sters,

the

a p p r o a c h , w e

t h e s e

t h e

researcher

r e s p o n s e s

T h i s t u r e

t h e

rule

a n d

reliable

n u m b e r s

o f

t o

i n f o r -

individuals.

I n s u r a n c e

T h e in

quality

d e b a t e s

o f

t h i n k i n g

o v e r

e x p e c t a t i o n ,

t h e

rationality

either

in

e c o n o m i s t s

a n d

tradiction

b e t w e e n

b e

i n t e r e s t e d

b u t

o n

the

t h e

s t a n d a r d s

c e n t u r y a m e n d h o n o r t h e

o t h e r ,

o f

a n

p r o b a b i l i t y

t h e

u s e

t h e o r y

a n d

a s k e d

6.6)

t o

a c c o u n t

here,

face

d e s c r i p t i v e

t u r n

o n

that

h o w

o f

t h e

claim,

statistics

u n l i k e

that

its

o f

has

t h e

t h e y

p r o f e s s

d o

r e a s o n ;

irrational

their are

u n w i l l i n g

p e o p l e has

d o

n o t

codifipractical

success

e x p e c t a t i o n in

t o

b e c o m e

w i t h

financial

its w o r t h

b y

e i g h t e e n t h -

t h e o r y

spectacular

p r o v e d

t r a p p e d

m a t h e m a t i c a l

b y

o f

c o n -

o r

p r o b a b i l i t y

r e a s o n i n g

issue

s a m e

fact

m o s t

P r o b a b i l i t y

m e r e l y

at

n o t i o n

t h e

in

rational

e v i d e n c e

t h e

h a n d ,

e x p e c t a t i o n

e q u a t i o n t o

o n e

p e o p l e

c o u r s e ,

n o t

p o i n t

t h e

b e e n

T w e n t i e t h - c e n t u r y

d e s c r i p t i o n

subjects

O f

o f

f o r m s .

m u c h

in practice.

they

T h e s e

c a u g h t

o f

their

this

also

O n

u p h o l d e r s

d e f e n d

has

in

1.5).

rationality,

o f t e n

are

a n d

(see

in t h e

moyen

m o d i f i e d

theory.

t h e o r e m s

industry: o f

o r

(see

today's

I'homme

g a m b l i n g .

p r o n o u n c e

e c o n o m i s t s

insurance

s i m p l e

e m p i r i c a l

practical

W h e n

o f

probabilists

t h e y

p r o b a b i l i t y

rationality,

w i t h

o f

b y

p r e s c r i p t i o n

p r e d e c e s s o r s ,

arbiter

the

in

its a x i o m s

cation.

its

p s y c h o l o g i s t s

e i g h t e e n t h - c e n t u r y t o

d i s p l a y e d

o f

c o u p l e d

the

m a r k e t -

place. H o w e v e r , i n g

o f

t h e

realities o f

i n s u r a n c e

p r e m i u m s

c l a i m s u g g e s t s . in

t h e

m o s t

It is t r u e

a p p l i c a t i o n p e r v a s i v e .

asters d i v e r s e

o f

t h e

o f

are

W o r l d "

c o n s i d e r a b l y

that i n s u r a n c e

statistical

D a n i e l

i n s u r a n c e

a p p l y i n g p r o b a b i l i t y

D e f o e ' s has

m a r k e t .

a n d

T h e

p o s t

m o r e

t h e

probabilistic

d r e a m

a l m o s t

w a s

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c o m e o f

t h e

a n d

first

actuary

t h e

a n d

against

today's has

pric-

t h a n

g r e a t practical

m o d e l s ,

in

t o

c o m p l i c a t e d

i n s u r a n c e t r u e

statistics

this

success

it is still "all

t h e

t h e

D i s -

e n o r m o u s

a n d

e v o l v e d

f r o m

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that

Numbers

256

o f

a

l o w l y

firm,

c l e r k

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all

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t h r o u g h

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m a k i n g

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s u c h

1 9 5 1 , p .

m a r i t i m e

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T h i s

a g o , as

m o d e l .

b e

a n d

t o

m o b i l e

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life

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i n s u r a n c e

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fire h u n -

is k n o w n

in

6 7 ) .

o f

p a r t

statistical l a r g e

e q u a l l y

likely

o t h e r .

A u t o -

n u m b e r s ,

b u t

w o r k m a n ' s

c a t a s t r o p h e s a s s u m p t i o n

like o f

t h e

e n o r m o u s

u s e

a

o f

o f t h e

t h e

c o m p e n floods) i n d e p e n -

reality,

f o r m

t h e

class,

t h e

a n d

o f

p h e n o m e n a

t h e

e a c h

d i c t a t e s

c u r v e

b u s i n e s s

s u c h

t h e

f r o m

m o d e l

t r u s t

t h e

t h e

w h e t h e r

a n d

a g a i n s t

b e t w e e n t o

o n

free-

a n d

w e r e

p .

a

q u a l i f i c a t i o n

w e l l - d e f i n e d

o n e

e x t r a c t s

f o r

w h a t

c o n d i t i o n s

n u m b e r s ,

d e s t r o y

r e l u c t a n t

c o m p r o m i s e

t h e

d o u b t f u l ;

disparities

statistics. a

is

t h e

o n

j u d g -

a c u r v e

in

t h e y

a b o u t

i n d e p e n d e n t

i n s u r a n c e

disasters

u n d e r s t a n d a b l y t o

large

a c t u a r y

o n l y

1 9 5 6 ,

w i t h

i r r e g u l a r

a n

i n s u r a n c e

as

o f

yields

t h e

o f

f o r m

m o r t a l i t y

e x p e c t e d

L u d d i s m

d o u b t s

g u e s s w o r k

t h e

b u s i n e s s ,

reliance

t o

m e t h o d s ,

o f

e x p e r i e n c e

f o r m s

5).

m o d i c u m

t h e

a n d

c o n s t i t u t e

o f

m e e t

t r i c k y

(Pfeffer,

satisfy

b y m i s f o r t u n e ,

i n s u r a n c e

w i t h

e n t i r e l y

p r o b a b i l i t y

w e l l - f o u n d e d

a

t h e m

fortified

t r a d e ,

figures

statistics

d u e

p .

i.e. b y d r a w i n g

h e a v i e r

t o

s h o u l d

-

l o n g

o f

s i m p l y

t h e

w h i c h

o n

o l d e s t

b e s t

r e g u l a r i t y

o l d e r

n o t

f r o m

d o w n

is

e v e n

really

o f

e m e r g e d ,

j u d g m e n t "

p o l i c y h o l d e r s

s t r u c k

h a v e

is

s h i p w r e c k s

p r o f i t

t h e

c o n s e q u e n t l y

also

is a

o n e

o f

" a c t u a r i a l

o f s u c h

is t h e

w i t h o u t

f r o m

T h i s

i n n o c e n t

" u n d e r w r i t i n g

T h e

e n o u g h

a

t h e

m o r t a l i t y

t e c h n i q u e s "

d i s t i n c t i o n s

as

d a t a

c u r v e ,

nice

c o n s e r v a t i s m

fires

t h e

b e t w e e n

a l m o s t

b u t

t h e

p o i n t s .

O t h e r

a n d

o f

e d u c a t e d

i n s u r a n c e

w a r h o r s e

f r o m

t r e n d s

w i t h

1.6),

t h a t

n e w

3 3 5 ) .

a r e

u n d e r w r i t e r s like

b a l a n c e

t h a t

(see

Life

o f

a n

r e p u t a t i o n

1 9 5 6 ,

u s e

o w e s

w i e l d s ,

p e r f o r m e d

g r e a t

t h a t

m a t h e m a t i c s

m y t h

(Pfeffer,

a m o u n t

fair

t h e

t r u e

w h o

h e

t h e

t h e

c a l c u l a t i o n s

b u s i n e s s

o f

is

o f

inject

e v e n

o f

s u c h

i n s u r a n c e

e x p e r t

t e c h n i q u e s

m a k e

s m o o t h

c l o u d

a n d

t h e

It is a l s o

n e w - s t y l e

o f i n s u r a n c e

" g r a d u a t i o n

t h e

" i n d i c a t i o n s "

( S p o e r l ,

b y

a

t h e

s o p h i s t i c a t i o n

t h e

a

w i t h i n

last c e n t u r y .

c o m p l a i n e d

t h e

G r a p h i n g

n o t

p o w e r

I n d e e d ,

a n d

i n s u r a n c e

eye.

o f

p r e m i u m s .

c o n s t r u c t e d

g o o d

c u r v e

m u s t

B u t

a n d

t h e

a n d

h a v e

f r o m

t h e i r

b a s e d

p o i n t s ,

m o r t a l i t y

for

d o

in

e x a m s .

statistics

t e c h n i q u e s .

table,

p r e s t i g e

a m o u n t

all b r a n c h e s

t h a t

world

i n f o r m a t i o n

e c o n o m i s t s

t h e

the

p r o t o t y p e

t h e

u n c e r t a i n t y

m a t h e m a t i c a l l y d a t a

t h e

a r c a n e b y

s o m e as

a n d

g r e a t

a c c r e d i t a t i o n

p e r f e c t i o n , " e l i m i n a t e d

is

t h e

f o s t e r e d

o n

o f

a l r e a d y o b v i o u s

a c t u a r y

r e q u i r e d

t o

t o

rule

s u m s

u n d e r t h e y

s u b j e c t i v e statistical

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Numbers

m o d e l i n g

a n d

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bility"

t h o s e

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risk

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w h e n

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individuals

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t o

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actuaries

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t h e

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assets,

u p o n

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-

o f

c r e w "

t h e

c o v e r

h u m a n

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p.

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t h o s e

t h e practice

t o

m o d i f y

o r

skill o f

t h e

statistics w h e n o f

r e d u c i n g

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t h e

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cells, h a v e

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tests, h o w

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in-

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lies

n o t

e v i d e n c e history, a

n o t

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S u c h

in

the

in

differently

w h e t h e r

t h e

o r

a

usually

s o m e t i m e s

a n d

initial m o d e l s

a n d

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are as

t h e

s o m e in

t h e

w o r k s

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f r o m

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d o n e

u n d e r

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in infection.

Like

T h e

clinician's

m a m m o g r a p h y

s y m p t o m s ,

b i o p s y

t h e

j u d g m e n t s

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o f

d r e a m

probabilistic

i m p o r t a n c e ,

accurate.

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tables

T h e

M a m m o g r a p h y

p r o c e d u r e

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breast

d e c i d e

1 0 0 %

irrational

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situation,

X - r a y s

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a n d

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necessarily

statistics are at h a n d

t h e

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results

the

t h e

o f

e x p e n s i v e

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o f

in-

c o m p a n y ' s

in q u e s t i o n .

a n d

breast cancer.

cells

physicians

difficulty

p o w e r w h o

o w n

his

t h e o r y

rules

s t r a i g h t f o r w a r d .

s u b t l e t y

p e r s o n a l

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-

clearcut

case. E v e n

o f t e n

t o

t o

p r o b a b i l i t y

a p p r o x i m a t i o n

w e i g h t

w h e t h e r

p r e d i c t i v e

t h e p h e n o m e n a

m a m m o g r a p h y

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family

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that

it is n o t

m a t c h

o p e r a t i o n ,

eral anesthesia

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the

his

officers,

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rules are n o t

u s e

o n

L i k e

c a n o n s

the

c o n s i d e r a b l e

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nuclear

u n d e r w r i t e r

ship's

o r

d i a g n o s i s

actuaries

j u d g m e n t s

r e a s o n a b l e

o r

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u n d e r w r i t e r ,

factor,

t h e

t h e particular a

o f

d o

w h e t h e r

t o a p p l y

t i m e s

t h e y

ineffable

o f

t o

aside

bizarre

it.

w h i c h

L o n d o n ' s

claims a n d

i n v o l v e d .

for

for

6 8 ) .

o f i n s u r a n c e

set

a

also

t h e

available

e v e n t s

F l o r i d a

t o

m a r i t i m e

M e d i c a l

A s

in

possible is

are

L l o y d s o f b u t

h e l p

b e t w e e n

today's the

singular

just t o

p e r f o r m a n c e

V e n i c e ,

o r

pianist,

are

o f

statistics

blizzards

statistics

c o m p e t e n c e

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a n d

rare

c o n c e r t

the p r o p o r t i o n

t h e

large,

e x a m p l e ,

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s i x t e e n t h - c e n t u r y tegrity

is

this applies n o t

for

w h e r e

o f

i n s u r a n c e

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e x p l o s i o n s .

stead

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w i t h

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particulars

in

n o t . availability

has

various

b e e n

o f

statistics

e x t e n s i v e l y

p o p u l a t i o n s

-

n o r

-

t h e

studied, in

t h e

as

exis-

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t e n c e

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icians, i g n o r e t h e

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utilitarian

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legal

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259

d i s c r i m i n a t i o n

utilitariansim,

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t h e s a m e i n g

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261

probabilistically:

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d e m i o l o g i c a l

is

s q u a r e w i t h

d a m a g e

the

t h e p r o p o r t i o n

s u b s t a n c e ,

T h i s is difficult act,

o r

rule

t o

m a k e

t h e

s i m p l e

birth d e f e c t s f u r t h e r

t o o

asso-

p r o b i n g

o f

m o t i v e s .

M e d i c a l

T h e

ethical

i n d i v i d u a l in

a n d

m e d i c i n e ,

T h e as

clash

ethical

a n y

h a v e

t o

e v i t y

a n d area

rates

b e e n

p u b l i c

constitute

g e n e r a l

b y

o f

W i l l i a m

m o r t a l i t y

fever,

b y

o f

t h e

relevant

s o

o b v i o u s l y

o f

variation

(see

p r o c e d u r e s

t h e

c o u l d

Ironically,

t h e

n e w

issues,

m e a s u r e s ,

a n d

L o u i s - R e n e d u r i n g

a n d t o

T h a t

1 9 7 9 ; o f

C o l e m a n ,

scurvy,

e n a c t

t h e

are

reluctance that

the

w a s

w h o

t h e

o f

t h e

is

e n o r -

t h e

1830s,

t o

l o n g -

for o f t h e

the

t h e

n e w

in

d e a t h

r e s o l v e

the

differ-

p u e r p e r a l reluctance

statistics

b y

w e l l

p i o n e e r s

t o

as

b o l s t e r e d

a d v o c a t e s

are

s t u d i e d

S t u d i e s

legendary, that

disciplines

t h e y

greatest

r e s p o n s i b l e

m e a s u r e s

c o n s e q u e n t i a l

since

years,

1 9 8 2 ) .

balance.

c o n t r i b u t i o n

V i l l e r m e ,

w e r e

t h e

c o n t r i b u t e d

m a i n l y

t h e

sharper

in

m e d i c i n e

the

o n

e v e n

p e r t i n e n t

Statistics

c h o l e r a

that

h a n g

the in

P e r h a p s

is

this are as

m e d i c a l

Farr

sanitation

o f

c e n t e r e d

a v e r a g e s

in

e f f e c t e d

i m p o r t a n t

v a l u e s

o f t e n

b u t

w o r l d .

statistics

n o t

all

f o r m u l a t e d .

m o s t

Eyler,

dictate.

N o t

t h e

authorities

t o

d e a t h

in

a n d

S e m m e l w e i s s ,

in

the

t a k i n g

issues implicit

t h e s e

especially

h o u s i n g

ential

t o

o f

a n d

science.

h e a l t h

h e a l t h

district,

c o n d i t i o n s

life

sharply

b y m u c h

w e r e

o f

m o d e r n

a t t e n t i o n

h a v e t h e

m a t t e r s

b y

p r o f e s s i o n a l

necessity

e p i s t e m o l o g i c a l

m u c h

m o u s l y

traditional

statistical

w h e r e a n d

g i v e n a n d

this

t h e

p r e s e n t e d

k n o w n

that

b e t w e e n

t h e r a p e u t i c s

s e e m e d

p e r s i s t e n c e r e m e d i e s

o r

explain. standards

o f

e x p e r i m e n t a l

statistical

d e m o n s t r a t i o n

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Numbers

262

e n u n c i a t e d

b y

agricultural easier.

R.

A .

research

F i s h e r w h o

t o b a c c o

F i s h e r h a v e

h a d ,

industry, s m o k i n g

w i t h

m e n t a l

p r o t o c o l

h a d

t i o n

that

t h o s e

l u n g

cancer

m o n o t o n i c a l l y is full

o f

factor

that

1978, w e

p p .

n e e d

n o t

t h o s e

s p u r i o u s

t o

b e e n

4 7 3 - 6 ) .

A n

t o

a n d

t h e

cancer

rates

v a r i o u s

s m o k i n g

o n

ician

o f

a n d

this

Fisher

t o

t w o

take

a n

a n d

p e r b e

t o

can

cause

t o

e x p e r i m e n t

t h e

b e

a

w o r l d g e n e t i c

(see

B o x ,

t h e

issue;

their

s m o k i n g

t h e

resulting

actual

at

o f

n o n - s m o k e r s ,

analyze

w o u l d

t h e

settle

m a i n t a i n

d e t e r m i n e

rates

b y

a n d

q u e s -

increased

cancer

c o u l d

t h e n

e x p e r i -

n o

B u t

c a u s e d

s m o k e r s

t h e y

his

risk

day.

t h e

s t u d i e s

h i g h e r

t h e

a n y

t o

h e a l t h

c o u r s e ,

that

b e l i e v e d ,

W e

o f

o f

research

that

m u c h

m i g h t

that

t r e a t m e n t s

s u c h

h a v e

g r o u p s ,

care

w a s ,

s m o k e d

o n e

p u b l i c

r e a s o n

i n d e e d

s m o k i n g

e x p e r i m e n t .

B u t

therapies

c o n t r o l

p o s s i b l e

a c c o u n t . detail safe

-

-

a n d

d o

b u t

t h e

is

r e a s o n it

n o r

u n n a m e d p a t i e n t M i k e

b y

a n d

Sinclair c o n t r o l s

A r r o w s m i t h d u a l

m i s s i o n

lation.

H e

ister it t o rest

as

o n c e

effect

o f

i m p o s s i b l e

n o v e l

o f

e n d i n g

is c o n f i d e n t o n l y

h a l f t h e

refuses

T h e t o

result

t h e

o f t e n

less

-

c o n t r o l s

t h e r a p y

in

it,

t h e

d i l e m m a . for

is,

a d d i n g

t o

e l e m e n t

o f

b e

in

g r o u p

t o

t o

al-

solidity

o f

at

'flipping

a

lives

n e i t h e r

w h o

anguish

if

its

w h i c h a n d

b e

B u t

far m o r e

believes the

that

c o m p l e t e

used.

t h e

o f

o n

s h o w n

are

if

s a v i n g

T h e r e

in

s u p e r i o r

e v e n

c o n t r o l

t h e

p r e s s i n g

can o n l y

w h o

in

t h e

least o f

a

o n e

cancer

coin'

"

(see

6 7 8 ) . t h e

m o r a l

a n d

o f

p h a g e

a c c e p t

m e d i c a l

i n f e s t e d his

n e w

effective,

e n t h u s i a s t

i n o c u l a t i o n

until

in

w i t h

t e s t i n g 1 9 2 5 .

p l a g u e

h e

p l a n s

areas, a n d

w h o

t o

w i t h

t o

t h e

i n o c u a d m i n -

leave

a c c o m p a n i e s

A r r o w s m i t h

w i t h

M a r t i n

b a c t e r i o p h a g e b u t

at least in s o m e

h e a l t h t h e

island

b e

o f

p u b l i s h e d

testing

will

p o p u l a t i o n , p u b l i c

delicacy

first

a C a r i b b e a n it

e x p e r i m e n t a t i o n

p r o c e d u r e s ,

is i n

a n d

u n d e r s t o o d

w i t h h o l d i n g

Arrowsmith,

t o

n o t

e x p e r i m e n t a l

irrational

p.

is

e x p e r i m e n t a l

will

p h y s -

scarcely

all t h e r a p i e s

justification t h e

is

g r e a t e r

d o u b l e - b l i n d

t h e

p o r t r a y e d

controls.

S o n d e l i u s ,

" n o

j o u r n e y s

ethics

m e c h a n i s m

k n o w s

1 9 7 7 ,

his

o f

justify

n e w

i n t r o d u c i n g

in

H e n c e

t h e

t o

h e i g h t e n s

L e w i s

studies.

attained

T h e

G o o d ,

h e a l t h

a d e q u a t e

t h e r e b y

researcher,

s u p e r v i s i o n

virtually

s u p p o s e

physician

e x p e r i m e n t a l ,

m e d i c a l

w h o s e

difficult

run.

closer

p r o b l e m

w h e n

t o

is

l o n g

p a t i e n t

p u b l i c

that i n c l u d e s

k n o w l e d g e t h e

i n v o l v e

t h e r a p y

effective

ternatives, t h e

t h a n

A n y

a n d

t h e r e

in

cancer.

a n d

c o n t e x t

unethical.

T e s t s

is

t h e

t o

t h e

as a c o n s u l t a n t

o f

s i m p l e

in

m e d i c a l

m o n e y

T h e r e

cigarettes

a n d

t h r o u g h o u t in

n o t ,

e x p e r i m e n t ,

at r a n d o m ,

v e r y

o u t o f

f i n d i n g s

f o u n d

p r o m o t e

habits

a n d

o f

o n l y assign individuals

in a d v a n c e

t h e

t h e

d i d

t h e m

p r o b l e m s

f o l l o w e d .

correlations, b o t h

world

a c c e p t e d

w e r e

w h o

n u m b e r

t e n d s

t h e

a c c e p t for

the

w o r k e d

n o t o r i o u s l y ,

s m o k e d

w i t h

h e

m a d e

cancer,

w h o

t h a n

after

n o t

r e f u s e d

l i n k i n g

rule

t h e h i m ,

a g r e e s

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t o

Numbers

r e n o u n c e

his

later

o f

dies

e v e r y o n e .

c r u e l t h e

T h e

a n n o u n c e s

e x p e r i m e n t

p l a g u e ,

his

g o v e r n o r

o f

t h a t

"as

v i v i s e c t i o n i s t s

f r o m

( L e w i s ,

p .

m e n t ,

1 9 2 5 ,

t h e

d e s t r o y s c o n t r o l

t a x e d ( W e

t o

a n d

s h o u l d

p o s i t e d : m e n t a l

since

w e

h a v e w e

r a n d o m i z e d , i n

f o r e i g n

s e c u r e

e n o u g h

b e n e f i t

o f

U n i t e d

S t a t e s

g e n e r a l l y trials.

o f

l a w

m o r e

is

p r o b l e m

in

p o s t w a r

lifts

test

t h e

u s e

b u r d e n

p r o m i s i n g

l e n i e n t

o n

justifying

t h e

u s e

p u r p o s e c o u n t i n g

o f

t h e

erases

v i c t i m s , o r

c e n s u s , t h e

all

o f

o f

o n l y

o l d

E

W

d i s t i n c t i o n s

t h a t

c r u e l

m e d i c a l t h e

f o r

statistical

o f

t h e

w a s

it

t h a t

u s e

w h a t

o f t e n

e x p e r i t o

b e

first a

l a r g e -

s t u d y

r e a s o n

s h o r t t o w a s

s t r e p t o m y c i n

p o l i c y

f o r

t h e

i n

t h e

F e d e r a l

in, a p p r o v e d justifying

n e w

o f

it

k n o w l e d g e

c o n t r o l

a n

i m p o s s i b l e

C u r r e n t

o f

is

t h e

as likely

F o r

o r

rigid

clinical

t h e

d e p r i -

p o p u l a t i o n .

p u r p o s e s ,

c o r r e s p o n d i n g l y

l a w

T h e

a n d

t h e

a g g r a v a t e d .

R U L E S

j u r o r

e x p r e s s i o n s u n i t s

t h e

g r e a t l y illness.

c o n t i n g e n c y .

after,

d r u g s

s t u d y

m o d e r n

c o n v e n i e n t

m a d e

6 8 2 ) .

f r o m

B a y e s i a n

t h e

p .

b y

o f i g n o r a n c e

s o u n d

e x p e r i m e n t e r s

e x p e r i m e n t a l

T h e

p a t i e n t s ,

d r u g s

N

s e c u r e

d i f f e r e n t

t r e a t m e n t

7 . 4

C o u n t i n g

a

t o

his

p e r m i t t i n g

i g n o r e d )

t h e

w h i c h

e v e r y o n e .

1 9 7 7 b ,

f r o m

( o r

1 9 4 6 ,

b y

o f

s e r i o u s

a n d

P e r h a p s

in

o b l i g a t o r y ,

o f

n e w

trial,

w o u l d

d e a t h

s o m e t i m e s

it is j u s t

justified

t r e a t

t h a t

is

efficacy

total.

m o r e

all.

bizarre

t h a t

e x p e r i -

s a v e

b y

cases o f

t h e

p l a n ,

c o r p s e s "

c o n t e m p o r a r y

o f

Britain,

( T u k e y ,

o f

truly

is rarely

t h e

t o

Y a n k e e

his

u n e t h i c a l

e q u i d i s t r i b u t i o n

w a s

e v e n

in

w i t h

y o u

will

B u t

after

p r e d a t e d

clinical

t o

r e s u l t

a n d

p h a g e

s a n g u i n a r y

e x p e r i m e n t

s t u d i e s

c a m e

t h e

A r r o w s m i t h ' s

o f

r e s e a r c h e r s

t h e

g i v e

p r e v e n t

c e r t a i n l y

k n o w l e d g e

a d v a n t a g e

t h e

t h e

p r o v i s i o n a l l y

p e r h a p s

t a k e s

is

t i m e s

a n d

o f

universally,

c o m m e n c e s

t r e a t m e n t

o f

i g n o r a n c e

p a t i e n t s

a h i g h l y

o f

B u t

careful

p e r m i t s

v a t i o n

a s s u m e

t o l d

t o

this little island.

m o s t

real

s t r e p t o m y c i n

f u t u r e

T h a t

n o

a p p e a l

c o n c l u s i v e

m e d i c a l

L a p l a c e ' s

p h a g e

c e r t a i n l y

w r e c k s

m o d e r n

t u b e r c u l o s i s ,

a

a

t h e

t h a t

t h e

u s as a l o t

c o n t r o l l e d

t h a t

in

c u r r e n c y

in

h e

d o u b l e - b l i n d

l e g i t i m a t e ,

available

o f

263

n o n e t h e l e s s

e x p e r i m e n t

like

as n o t .

o f

w a s

o u t

shall

r u n

r e c e i v e

h o w e v e r ,

t r e a t m e n t ,

ethically

t o

a n

w h e n

u s i n g

o n

a n d

i n g e n u i t y

S o m e t h i n g

s t r e p t o m y c i n a g e

n o w

p r o c e d u r e s

i m p r o v e m e n t scale

lost

d o u b l e - b l i n d ,

e x p e r i m e n t a l m e t h o d s . )

will b e

c a r r i e d

I

i n a n d

l o n g

fictional

a d d ,

e x p e r i m e n t s

p o s s i b l e

t h e

t h e

justify

island,

i n

world

w o r d s

A r r o w s m i t h

p o p u l a t i o n

the

a d m i n i s t e r

d y i n g

his icy r e s o l v e ,

A r r o w s m i t h ' s s t a n d a r d s ,

as

a n d

t h e

c o m i n g

t h a t

lives i n A s i a t h a n w i f e

far

3 7 6 ) .

c o n f i d e n t

rule

o f o p i n i o n

a r e

m a t t e r

identical. s o

i m p l i e s B y

crucially

its t o

that,

f o r

v e r y

n a t u r e ,

t h e

t h e

i n d i v i d u a l

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264 -

t h e

m o t i v e s

for

statistics

c r e a t e d ations k i n d

t h e

o f

culus

statistics

o f

t h e

n u m b e r s

f o r g e

for

o f

S i n c e d r a w p r o v e b u z z

o f

m o r e

t h e

n o

w a y

its

t h e

Bayes'

a n d

are

t h e o r y

cite

t h e o r e m the

d o e s

a t t e n d

n o t

a d d u c e d

t h e o r y

I n t r o d u c i n g t h e

" i n n o c e n t

until

o f

difficulties probabilists

p r o v e n

Bayes' o f

( K e y n e s ,

o f

o f

a n d

i n f e r e n c e a z e r o

Bayes' guilty"

i n f e r e n c e s

t h e s e

in

1 9 2 1 ) .

violate

t h e

p r i o r

t h e

this

o f

a x i o m

1978,

c o u r t r o o m

p .

o f

t o

b e

p r i o r

reason,

m o s t

o f

q u e s legal

s i m p l y

a

c o n p r o -

u n i f o r m ,

a n d

that

o f

lay

in-

p r o b a b i l i t y

c o u n t e r s

o f

that

it

d o e s

e v i d e n c e ,

it

e v i d e n c e

o f additivity

in

1 4 5 ) .

guilt

dramatically w o u l d

m a k e

principles A n y

probabilities, are

t o

also

a b a n d o n e d .

i g n o r a n c e

a

leads

already

w o u l d

t i m e - h o n o r e d

h a v e

is

se. M o r e o v e r ,

p r o b a b i l i t y

s u p p l y

state

F o r

p e r

t h e y

is

a l t h o u g h

b o d y

t o

t h e r e

s o u n d

effect

for

e v a l u -

t h e

T h e y

o p p o s i t i o n

K o r n h a u s e r , i n t o

so.

c a n o n s

certain

e v i d e n c e

w o u l d

a

a

o n

n o t

t h e

r e a s o n i n g ,

g i v e n

m a y

d o

t o

t h e

T h e

d o

S o m e

e x c i t e d

i n f e r e n c e

o f

t o

h o w

S i n c e

explicit,

studies

t h e o r e m ,

m u s t

t o

in

t h e o r e m

if jurors

t o

a n d

s h o u l d

t u r n s

Bayes'

t a u g h t

legal

t h e

e v i d e n c e

t h e o r e m

fixing

b e

1 9 7 0 ) .

i n f e r e n c e

Since

a p p l y

that

a c c o r d i n g

m o d e l

( B r i l m a y e r

B a y e s i a n

t o

s h o u l d

w e i g h t

B a y e s i a n

essentials

a n d

ersatz

t h e

has

scholars.

t h e

p s y c h o l o g i c a l

o t h e r

trial p r o c e s s .

i m p o s s i b l e

c a t i o n

t h e

(or,

c a p t u r e s

Fairley,

o f

a n d

t h e i n t o

a n

i n s t r u c t e d

statisticians)

that

-

d e c i s i o n - m a k i n g .

b e

cal-

j u d g m e n t s

i n f e r e n c e ,

d e b a t e

a r g u e s

a n o t h e r

classical

p r o v i d e

t h e

m u d d l e d

a n d

t o

t h e o r e m

w h e t h e r

associ-

t h e

m a t h e m a t i z i n g

Bayes'

lawyers,

r e n d e r i n g

flawed

t o i m p e a c h

p r o b a b i l i t y

t h e y

o f

s h o u l d

e x p e r t

as

e x p e r t

intuition,

faction

o f

s t r e n g t h t o

d o e s

r e c e n t

is a

b y

judges,

t h e o r e m

t h e n

( F i n k e l s t e i n

u s i n g

r e a s o n i n g ,

h o p e l e s s l y

m e a s u r e

it

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s u c h

jurors

r e a s o n s

probabilities

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e x a m p l e ,

o r

r e a s o n a b l e

t o o l s

o n e s :

m e t h o d s

for

t h e

subjective

o l d

origi-

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H o w e v e r ,

t o

s a m e

translate

t h e

empirically

t h a n

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consistent, tuitions

test

dictates,

-

r e p l a c e d

a m o n g

t o

o f

o l d

t o

t h e

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t h e

m e c h a n i z e

w h e t h e r

p r o - B a y e s

v e r s i o n

t o

claim

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t o

t h e

its l o n g s t a n d i n g

irrationality.

h a r k e n s

are

e v i d e n c e

v e r d i c t s

w h e t h e r

r e a s o n i n g .

o f

f r o m

c o n t r o v e r s y

o f

f o r m

issue

i n e d u c a b l e ,

c o r r e c t

f o r m a l

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1 9 7 0 ,

o b v i o u s l y

alter

are

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stance,

c i r c u m s t a n c e s

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e x p e c t a t i o n ,

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century.

p e r p l e x e d ,

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for

c o u n t e d ;

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legal

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in

world

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t h e

i n f e r e n c e s

article

probabilists

rules.

p r o b l e m s

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c o n s e n s u s

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t o m a k e

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n o w

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t h e

in o r d e r

sociological

probabilists n e w

t h u s

-

act, attitude,

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rule

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nality o f a m o n o g r a p h tive

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t o

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m o d e l ,

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f r o m

p o l i t e l y

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b a d

e v e n

r e a s o n s

t h e o r e m

r e a s o n ,

( 1 9 3 5 ) .

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t o

g i v e

d e r i v e it

t o

g a p

r e a s o n

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a c o n t r o v e r s y

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s u g g e s t

t e c h n i q u e s ,

a

is

b a c k g r o u n d :

i n t e n t ,

1 9 7 1 ,

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i n f e r e n c e

t h e

s a m e

w o u l d

m i n d s

e x p e r i e n c e

like

w a r n

b e

a n d

t h e

r o o t

w h o

is d e f i c i e n t .

lies w i t h

this

n o n -

risk

t h a t

e x p e r i e n c e

w i t h

n u m b e r s ,

i n t o

m a y

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j u r o r s

t o

i n t o

i n t e n t

t h e n ,

is at

Experiments

t e c h n i q u e s

t h e m e s

a n d

statistical

w i d e n e d

r i g h t

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m a t t e r s

e x p e r t i s e ,

h a s

t h a t

T o

o n

c h a r a c t e r

t h e

1.8).

t h a t

t o

precisely

m e t h o d s

i n f e r e n c e s

legal

state

p r o b a b i l i s t i c

p r o b a b i l i s t s ,

b e s t

t o

e v i -

likely

a n d

T h o s e

h o w

is m o r e

t h a n

1 9 7 5 ) .

f o r e n s i c

" h a r d "

s o f t "

b e l i e v e

e v e n

c o n c l u d e

p a t e r n i t y

(Fairley,

m a t h e m a t i c a l

k n o w l e d g e ,

j u r o r s

it?

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t h e

r a t h e r

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d e m o c r a t i z e

e m a t i c s ,

w o r d ,

s u c h

l i t e r a t u r e

t h e

h a s

t h e o r y

h o w

o f

a b o u t

m a s t e r e d ,

a p p l i e d

fact

t h e

o n e ,

o f

r e a s o n i n g t o

w h o

e i g h t e e n t h - c e n t u r y

s c h e m a t i c t h e

a n d

B a y e s i a n

p r o b a b i l i t y

s e n s e s

f o r

it,

o v e r

s o r t

e x p e r t

" r a r e "

1 5 0 0

o v e r w e i g h t i n g

p r o o f ,

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s o m e

o f

o c c u r r e n c e

s w a m p

t h a t

a n t i - B a y e s i a n s

m o t i v e

as v o l i t i o n ,

is t h e p r o b a b i l i t y

f o r

p o s s i b l e

t h e

statistical

o f i n d i v i d u a l

e l e m e n t s

as

a n d

o f m a t h e m a t i c a l

a w a y

as

a n

c o m b i n e

e v i d e n c e

f o r

this

r u l e

-

p r o - B a y e s i a n s

m u c h

o f

t h e

h a n d p r i n t s

e v i d e n c e :

P o l a n d ,

f o r m

a p p r o x i m a t i o n s ;

s p e c i o u s

I n

t h a n

s o m e h o w

T h e

as

r o u g h

d a n g e r s

o f

tests, w h a t

analysis

q u a n t i t a t i v e

m a t c h

e v i d e n c e .

r a t h e r

265

quasi-scientific

child?

p r o b a b i l i s t i c

in

world

u s i n g

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b l o o d - t y p e

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t o

accidental

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p r e s e n t e d

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p r o b l e m s

results o f

s u b m i t t e d

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t h e

rule

m a t h -

T h o s e

allegedly b a t t l e

is

discipline

in

w h o

p o r t r a y j o i n e d . o f

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Numbers

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180). C o m p a r i n g

c h i e f

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t a c k l e

dollars'

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w e

m u s t

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n u m b e r

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m o r e

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life?

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t h e

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t h e

t h e m

t o

o u t c o m e s o

s u b j e c t i v e

u p

p e r s e v e r e

assessors

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i n s p e c t o r s

o b j e c t i v e

s u b j e c t i v e

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p o s e s

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risk

e a r n i n g

a m o n g

1 0 0 , 0 0 0

t o o

t h e

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t h e

q u a n t i f y i n g

t h a t

e x a m p l e ,

m a k e

o f

a n d

n u m b e r . '

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d e r i v e d

collected,

said

is

b e

b e e n

i n

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c a n

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difficulties

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t r a c k

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b u t

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traditionally,

a n d

p a y

p e r m i t

i n g

d e b a t e d :

r u l e

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a u t o m o b i l e

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s i m p l y

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g u e s s w o r k

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3 7 ) .

p r o b l e m s

d a t a

m o r e

t h a n

p r o b a b i l i t i e s t h e

t h a t

e x c e p t i o n

p r o b a b i l i t y

B u t

t h e

i r r e v o c a b l e

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t h e

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s h o w

f o r

cases

e x p e r t s '

s u c h

' g o o d . '

p .

lives,

o n

in

a r e

a

as

1980,

t h e

s t u d i e s

a c c i d e n t s

t h e

d e f i n e

p r o b a b i l i t y

is m o r e

t h e

rationally.

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m o n e t a r y

f r o m

t h i n g s

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b e t w e e n

e x p e r t s

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t h e

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for

r e s o r t

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f o r m i d a b l e

u n i t s

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substantial

m o r e

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cases,

see

t h e

t h e

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see

( S c h n e i d e r m a n ,

e v e n

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p s y c h o l o g i c a l

p r a c t i c e ,

s o m e

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p o w e r

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o f

a c c i d e n t s .

a p p l y ,

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fear

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exist,

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t o

s t u b b o r n

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w r o n g " e v e n

f o r

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t o

a n d / o r

t h e

t h e

a u t o m o b i l e

m e n t i o n e d

c o m p a r e .

( a n d

f o r

assessors

p r o b a b i l i t i e s

-

statistics

by.

world

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the

N u m e r o u s

criteria

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rule

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its

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as

r e s p e c t a -

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Numbers

bility w i t h b y

B .

d e

t h e

r i g o r o u s

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o f

w i t h

e m p i r i c a l

valor,

for

t h e

v a r i e t y

u p o n

p a r t

objectivity,

p r o b a b i l i t i e s

L l o y d s

t h e

0, a n d

a m o u n t

t h e

w i t h

4 4 1 ) . a n d

t h e

f u m b l e

p r e s s e d

like

p e r s u a d i n g

r a c e t r a c k

o f

p r o b -

e x a m p l e ,

b a d

It

e s t i m a t i n g

n e w

w h e n

finely.

t h o s e

f o r m a l

a r e

T h e

m a g n i t u d e

m a k e s

a n y

level.

a

o f

t h o s e

t h e

s t u d y

t h e y

h a r d e s t

1 9 8 0 ,

o f

u n t i l

for

d e s p i t e

p e o p l e

especially t h a t

o f

m a k e

o d d s

w e

c o n t i n u u m ,

f o r t h c o m i n g ?

e m p t y

h a b i t u a l l y

i n d e e d ,

w o u l d

v o g u e

q u a n t i f r e n i c i r o n i c

g o o d

analysts

a

n o t

is n i l -

b e -

shall

v a l u e s

a b o u t

e x e r c i s e

is

t h e

a r e

r a t h e r

m o r e

i n c l u d i n g

i n s u r a n c e

k i n d

t h e y

s u b j e c t i v e

f o r

something

t h e

a

s u b j e c -

c h o o s e

g i v e n

o r d e r s

p a r t i c u l a r l y

j u d g m e n t s

s i t u a t i o n s

g r e a t e s t

a n y

o f

difficulty

e x p e r i e n c e

t h a t

t o

a r o u n d

n o n e t h e l e s s

j u d g m e n t s , o f

f o r

e x p e r t s

m i n d ,

p r o b a b i l i t y

o u t

r e q u i r e d ,

as

t o m o r r o w ?

w i t h

a d v a n t a g e

k n o w s

a n d

p r o b a b i l i s t i c

j u d g m e n t risk

-

r a i n

t h e r e

j u d g m e n t .

u s i n g

o f

i n

s u b j e c t i v e

safety

a s k e d

crystallize

speciality

p e o p l e

d o e s

v e r y

Fallin,

s u s p e n d i n g h a z a r d

t h a t T h i s

a r e

s h e

o r

2 0 4 - 5 )

t o

s u c h

c o n t i n u u m

s t r a i g h t

is

is

5 0 %

t h e

p a r t i c u l a r

o r

disasters

m o s t

u n c e r t a i n

t h e y

a

u p

a r e

p e r s o n a l

t o

t h e

Still,

i n s o f a r

s t a t e

m o r e

a n c h o r e d

h u n c h e s

t r u e

it

o f

n u c l e a r

a l o t t e r y

full

t h a t

i n f o r m a t i o n

m i s t a k e s

i n

h e

p r o b a b i l i t y

s u g g e s t

t a k i n g

o n c e

m e c h a n i z e

" c o r r e c t "

will

for

t e n d

p r o b a b i l i t y

h a v e

l o n g e r

u s e

t o

assessor

-

d i v i d e

t r a i n i n g

w h e r e

p p .

n o

naturally.

g e s t s

in

cases

t h e

assessor

0 . 0 0 0 1 ) ,

p l a n t

s u c h

m e n t s

t h e

t h a n

" t h a t

a r e

fixing

t o

t h e

a n d

assessor's

t i c k e t

r e s p o n s e s

n u m b e r s

little

c o m e

a n d

1 9 7 5 ,

p u t

s t r o n g l y

a s k

in

t h e i r

t h e

o f

classical p r o b a b i l i s t s .

q u a n t i f y i n g

l o c a t e d ,

r e p e a t e d

assessor in

a

n o

a n d

q u e s t i o n

a n d

a r e

f o r e c a s t e r s ,

U s u a l l y

in

C o n s i d e r a b l e

u n c e r t a i n t y "

o f

p r o b a b i l i t i e s

0 . 0 0 1

e v e n t s .

a r t

m i r r o r

-

t h e y

t h e

p r o b a b i l i t i e s

r a t h e r

s m a l l

f o r

i n t e r p r e t a t i o n

classical p r o g r a m

t h e

is

t o

b u t

267

P r o b a b i l i t i e s

d e c i s i o n - m a k i n g

e v e n t

n a i v e

1 0 0 % ,

w e r e

w o r l d .

is t h e n

m o s t

c o n f u s e

r a r e

t h e

1 9 5 0 s .

belief,

w e a t h e r

a n d

t h e

s i m p l y

7 5 % ,

a p a r t

in

i n d i f f e r e n c e

d o

o f

t h e

this site?

p r o c e s s n o t

t h e

T h e s e

o f

oil at

o f

s a m e will

s t a t e b e t

drill f o r

i n

o f

c o n s i s t e n t

a n y

S a v a g e

r a t i o n a l i z e

p r o b a b i l i t i e s .

i n t e r n a l l y

a p e r s o n a l i s t

as t h e y

s c h o o l e d

world

o f

d e g r e e s

e c h o

the

revival

e x e c u t i v e s ,

a r e all b e i n g

t h a n

L.

e x p e r i e n c e ,

t h a n

tive

a n d

rule

t h e

u n -

s u b j e c t i v e s y m b o l i z e

fact.

v i r t u e s

It

is

o n l y

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int o

268

t h e

e x t e n t

t h e y

are

T o t o

that

t h e y

i n t e n d e d

t h e

a g r e e

t o

a m o n g n o

o u t

p s y c h o l o g i c a l a n d

lay

respectively, accidents,

m e n

t h e

t o

o v e r o f

fatal

as

M a s s i v e

T h e a n d

e x p e r t s

irrationality,

n u c l e a r

p o w e r

s o c i o l o g i s t s theless risk,

for

in

t e n d e n c y

u n d e r w e i g h t

t h e

t h e

"disaster

p o t e n t i a l "

t h e

v i v i d n e s s

G o v e r n m e n t s w h e n

large

relative

shifting

t h e

c u l a t i o n s

o f

t h e

w h e r e

o f life a n d

h a d

s o u g h t o f

f r o m

c o n s e n s u s .

l a y m e n

b e l i e v e d p r e t e n d

d e a t h "

a

t h e

sorts

is

B u t

t h e

Far f r o m r e s e n t e d

v a l u e s that

it

( q u o t e d

is

f o r m s

b o w i n g

s h o u l d best

t o

in D o u g l a s

t h e

o f

t o

c o u n t .

lay-

o f

t h e

1980, p.

nuclear

as m a s s

hysteria

o v e r

b e t w e e n

b u t

m i g h t s t u d y

w e r e

also

t o

w h e n risk

t o

distort

lay

subject.

d i s a p p o i n t e d t h e y

p r o b l e m

in

politics

t h e t o

v a u n t e d

objectivity

a b o u t

o f

rather

o f calt h a n

objectivity

i n t o

travesty

h a d

h o p e s

that

t h e

a

o f

the

f a n n e d

is

n o n e -

a n d

o p i n i o n

technical

o f

a n d

i n v o l u n t a r y

v a l u e

t o

m u c h

78).

the

e x p e c t a t i o n

that

a n d

p u z z l e d

d i s m i s s e d

irrational

e n e r g y ,

"It

a m o n g

a n d

s o l u t i o n

i n t r u s i o n

w a s

p s y c h o l o g i s t s

e x p e r t

a

v a l u e s

e x p e r t s '

t h e

-

States

t o

s t u d y

p r o p o r t i o n i n g

discipline

a s o l u t i o n

o f

o f

etc.

risk

o u t c o m e

d e p i c t e d

U n i t e d

r e a l m

t o

risks,

far g r e a t e r

part

v o l u n t a r y

t h e

b e t w e e n

associations

t u r n e d

b o r n

e s t i m a t e d

b e h a l f o f

r e c k o n i n g s

n e w

v a r i o u s

t h e

o n

t o

a u t o m o b i l e

( K a s p a r ,

historical

their citizens rejected

c o n t r o v e r s y .

t h e y t o

T h e y

o f

a n d

their

u n w a r r a n t e d

e v e n t

c r e a t e d

E u r o p e

d e c i s i o n

e x p e r t s ,

t h o u g h t

T h e y

t h e

t h e

they p e r c e i v e d

intuitive a n

b e

w h a t

for

w a s

e x p e r t s

o p p o s i t i o n .

w h a t

p u b l i c

e x p l o s i o n s ,

p u b l i c

T h e y

o f

accidents,

t o

f o r

o v e r w e i g h t

in

the

d a n g e r o u s "

b y

s u c h

"subjective"

o p p o s i t i o n

t h o u g h

p r e f e r e n c e

is large,

risk-benefits

a n d

d a m p e n e d

p r o b a b i l i t y

n u m b e r s

c o m m i s s i o n e d . t h e

in

a t o

w h i c h

v e h e m e n t

c o n d u c t e d

it

u s i n g

p s y c h o l o g i c a l

calculated

w e a p o n s .

-

N o

d e v a s t a t i n g

o v e r

able

disparities

p l a n t

that

w e r e

risk p e r c e p t i o n

s y s t e m a t i c

p u b l i c

t h e y

g e n e r a l

p o w e r

a n d

b u d g e

t h e

d a n g e r s

u n d e r s t a n d i n g

i n n a t e

w i t h

e x p e r i e n c e

risks

relative

s o m e t i m e s ,

t o

o f

1 9 8 2 ) .

T h e

v a r i o u s

t h e

t h e y

like

o f

w h e n

a n d

for

e x p l a i n e d

factors

p e r c e p t i o n s .

o n

e v e n

" o b j e c t i v e "

e v e n

w h a t

nuclear

h e l p

p e r s o n a l

p e r s u a d e

nuclear

their h e a d s

s y s t e m a t i c

a n

risk

t o

failed

a n d

c o u l d

as

plants,

and,

a n d

assessors,

Lichtenstein,

campaigns,

s h o o k

ineffable

discipline

t o

accidents.

S w e d e n ,

t h e

r e v e a l e d

probabilities

"insensitive,

in

that

analysts)

i n d i f f e r e n c e

e d u c a t i o n

i n d u s t r y

e d u c a t i o n

p o w e r

small

world

m a g n i t u d e

t h e w i d e s p r e a d

a u t o m o b i l e

e x p e r t s

t h e

(referred

a n d

n u c l e a r

p u b l i c

o n

risk

p r e g n a n c i e s ,

d i s c o v e r

a s t r o n o m i c a l l y

t h e

e x p a n d i n g

risk

f l o o d s ,

t o

o f

studies

v i e w s

Fischhoff,

r e q u i r e d

f r o m

o f

rapidly

b y

the

s u p p l a n t .

a m o u n t

suit. T h e

(Slovic,

d e r i v e d

t h e m s e l v e s

f o l l o w

e x p e r t

rule

d i s a p p o i n t m e n t

t e c h n i q u e s ,

o f

are

Numbers

o f

take

v a l u e - f r e e

d e c i s i o n s

in

a n d

W i l d a v s k y ,

1 9 8 2 , p.

7 3 ) .

a n

area

rational m a t t e r s A b o v e

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Numbers

all,

t h e y

t h a t

it

r e f u s e d

w a s

e x p e r t i s e a n d

t o

r a t h e r

a

c o l l i d e d

P o l l a k ,

a c c e p t

rule

t h e

q u e s t i o n

h e a d - o n

the

issue

t o

b e

w i t h

as

world

a

p r o b l e m

d e b a t e d .

t h o s e

269 t o

H e r e

b e

t h e

s o l v e d ,

ideals

o f p a r t i c i p a t o r y

i n s i s t i n g

o f

t e c h n i c a l

d e m o c r a c y

( N e l k i n

1 9 8 0 ) .

G a m b l i n g

T h e

v e r y

o l d e s t

c e r n s

g a m b l i n g ,

c l o s e r

t o g e t h e r .

p r o p o s i t i o n t o

i g n o r e

m u c h

d i v e r g e n c e a n d

c a l c u l a t i o n s

t h e m .

S i n c e

f i r s t h a n d m a d e

a

s t u d y

w e r e

fair:

o u t

o f

c a l c u l a t e d

t h e

o t h e r

p l a i n e d

b y

o f

b e e n

w h i c h

c h a n c e s .

F o r

a r e

e x a m p l e ,

o n

a n

w i n ,

s o

t h a t

y o u r

m o u n t s

v e r y

q u i c k l y ,

late

e v e n

n i n e t e e n t h

r e l e v a n t h o r s e m i z e

t h a n

u p

t o

t h e i r

o f

t o

in

Of

p r i m e

d u e

c h o i c e

Games

n e e d

t o

ticularly e v e n

a w a y 1 9 8 6 ) .

d i s t i n g u i s h h i g h l y

s o m e

a n d

t o

w h a t

t h e

o f

a

C a r l o .

t i m e s ,

o f y o u

t o

h a v e

e v e r y

K a r l

P e a r s o n

T h e

a v e r a g e s

b l a c k

T h e

t o

y o u r

capital

large-scale

a n d

t h e

y o u

b e c a m e

e v e n

o f

o n e

u n t i l

y o u

t h e

g o i n g

s t a k e

o v e r

b e t t i n g

i n

a m o u n t

o d d s

b e t

t h a t

r a c e t r a c k

total

c h a n g e

o r

a

a n y b e t

e x 1 3 4 ) .

o n

lose

is

b e

o n

s y s t e m s ,

b e t s

w i t h

p r o b l e m

f r o m

1 9 8 3 , p .

d o u b l i n g

t i m e

h a d

d e v i a t i o n s ,

M o o r e ,

b e g i n

l o s i n g

d e v i a t i n g

s t a n d a r d r e d

a n y

c o n t i n u e

p r o b a b i l i s t s

f r o m

c a l c u l a t i o n s

h o r s e s

t h e y

h a u n t e d

t h e v o n

r e v i v e d

t h e

in

t h e

case

o n

c o n s t a n t l y

less

a

g i v e n

t o

m i n i -

i n s u r a n c e .

N e u m a n n

a n d

o f

g a m b l i n g

i n v e s t m e n t s

b e

r a t i o n a l

a n d

m a x i m i z a t i o n

p r e d i c a m e n t

i r r a t i o n a l

t o

c o n t r a d i c t i o n s

b e t w e e n

self-interest.

n e o - ( D a n i e l ) B e r n o u l l i a n

rationality

p h e n o m e n o n

T h e i r

b y

c o m p u t e

o f

b y J o h n

e c o n o m i c t h e

still

i m p a c t

w h i c h

s p e c u l a t i v e

f o r m s

u n i t .

b o o k m a k e r s

a r e

a d v a n c e d

o f

t h e

since

( 1 9 4 4 ) ,

c r i t e r i o n

L o p e s ,

o f

b e t

o f

as

in d i s t r u s t i n g g a m b l i n g

e x h a u s t i n g a d v e n t

t h e m

g a m b l e r s

a l t h o u g h

c o n -

losses.

g a m b l i n g

r a t i o n a l i z e

1 9 7 6 ;

t i m e ,

o n e

p r o b a b i l i t y

h o w e v e r ,

p a r t

r a t i o n a l

Theory a

is

t h e

c e n t u r y ,

race

is

e i t h e r

W i t h

p o t e n t i a l

w i d e s p r e a d

g a i n

f e w

5 7 ; also

M a r t i n g a l e , t h e

utility;

T h e

p r i n c i p l e

d o u b l i n g

k n o w l e d g e

E c o n o m i s t s ,

T h i s

n e t

1 8 9 7 , p .

o p i n i o n

g a m b l i n g

8 , 0 5 3

0 . 2 5 % .

lay

b r o u g h t

M o n t e

s w i t c h e s

t h e

t h e

at u p

u n a n i m o u s

o n

w i t h

c h a n c e ,

m a x i m u m .

[1894]

n o t

tables,

c a m e

m a n y

a l m o s t

o r v e r y

w h e e l s

o n l y

a n d

c o n d e m n

g a m i n g

r e d

b y

t o o

b a s e d

u n i t

c a s i n o

spins,

( P e a r s o n ,

h a v e

t h e

v a l u e

t o

C a r d a n o ,

r o u l e t t e

s u g g e s t e d

c h a n c e

P r o b a b i l i s t s m o s t

1 6 , 0 1 9

h a v e

e x p e c t a t i o n

at

t h e

e x p e c t e d

h a n d ,

c e n t u r i e s

G i r o l a m o

o f

p r o b a b i l i s t i c

c o n t i n u e o f

e x p e r i e n c e

o n c e

e x p e r t

t h r e e - o d d

P r o b a b i l i s t s

b y

t h e

o f

f o r c e d

g a m b l i n g w a s

f u r t h e r

f r o m like

E c o n o m i s t s

o f

M o r g e n s t e r n ' s

e x p e c t e d

e c o n o m i s t s ( I g n a t i n

a n d

c o m p l i c a t e d

r a t i o n a l

c o m m o d i t y g e n e r a l l y

O .

t h e o r y

v a l u e

literally S m i t h , b y

i n v e s t m e n t s , f u t u r e

a d m i t

t h e

as

t h e p a r -

t r a d i n g

o r

s t r u c t u r a l

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Numbers

270

similarity o f

b e t t i n g

p e r s p e c t i v e e m a t i c a l

m a i n t a i n t o

D o w

e x p e c t a t i o n ,

a n d for

b u y

that

syndicates sell

Industrial

( M o o r e ,

d o

o f

p.

fall

a n d

i m p a c t

o n

In

chapter,

this

these

t o o l s

values; d e e p

in

has

r e a s o n s

i n t o

battled.

O n

cations

o f

t h e r e ply

T h i s

Financial N e w

t h e

like

is n o

m i r r o r i n g

s i m p l e

act

o f

t h e

statistics

established also

part

certainty.

h a v e n e w

o f

t h e

T h u s

part

e x p a n d e d ,

steadily

retreated.

in

t h e

m a t h -

e c o n o m i c is

h a r d

p e r m i t t i n g L o n d o n

t o

i n v e s (or

t h e

o n

t h e

b e t t i n g

s h o w

h o w n e w o f

areas

t h e

t h e y

t o

b e

m a t t e r .

t h e s e are

m a n y

o f

w e

that

b u t

o b j e c t s

the

claim i n t o

rationality t o

s e e m i n g

p a r a d o x

chance's

t w i n

n e w

b e l i e v e that,

c u t

s o

t o

b e

t h e

as

u n c e r t a i n t y

c o i n e d claims

that t h e

w i t h

s i m t h e

attitudes

a n d

b e l i e v e

that

o f

t h e

t h e

appli-

m a r k .

T h e s e

n e w

values,

authority.

n u m b e r s

t o

o f

e v e n

t o

t o

appli-

H o w e v e r ,

seen,

e m p i r e

a p p e a r s

e m -

universally

s e n s e

c o l o r

f r o m

m o s t

a m b i t i o u s

fatalities. in

t h e

e v e r y w h e r e

r e v e r b e r a t i o n s

b e i n g ,

a n d

applications

c r e e d

strays

o f in

h a v e

c a n

g r o w i n g .

application

a l m o s t

traffic

A s

still

T h e i r

a n d

less

neutral,

life.

facts

are

are

o f

in

b o u n d

P y t h a g o r e a n

this

c r e e d

subtle,

that

a s s u m p t i o n s

far

a n d

g r e a t

as

o u r

w h e r e

statisticians

a

t h e

v e r y g u i d e a n d

registration

o f

o f

P y t h a g o r e a n

steadily

are

d e s c r i p t i o n ,

s t a n d a r d s

t h e

t h a n

d i s t i n c t i o n

o u t r i g h t

t h e

b e c a u s e

that

i n n o c u o u s

i n v o l v e s

called

f r o m

"useful

is e n o r m o u s

c o n s t r u e d ,

the

facts

m e r e l y

a

I n d e x

i.e.

s t u n n i n g

J u s t

t h e r e

a n d

s o

q u a n t i f i c a t i o n

applications

c h a n g e s ,

b r o a d l y

It

o f

t h o s e

say

interpretations.

cations

o n

t o

c o u n t i n g

is

sciences,

n o t

bare

is

as t h e

t h i n k i n g ,

a p p l i c a t i o n

-

b e c o m e

o f

census

rather

a s c h e m e

T i m e s

Y o r k )

i n d e e d

f o c u s e d

contrary,

the

s e r v e t h e

I n d e x ,

w a y s

statistics,

that

m o r a l

m a r k e t

C O N C L U S I O N

u n r e a s o n .

is

t h e

s t o c k

1 4 3 ) .

for

a n d

traditional

controversial.

accepted,

m a d e

t h e

H o w e v e r ,

t h e in

daily life, as w e l l h a v e

o n

o n

C o r a l

statistics h a v e

w e

b a c k

n o t .

7 . 5

P r o b a b i l i t y

world

b e t t i n g

t h e

I n d e x

1 9 8 3 ,

the

i n v e s t m e n t s

like

units

a n d

a n d

b e t w e e n

t h o s e

a n d

J o n e s

m a r k e t

at a c a s i n o

d i s t i n c t i o n

f u n c t i o n "

tors

o f

rule

o f

a n d It

c o m e s

c h a n c e

h a v e

is

just

Downloaded from https://www.cambridge.org/core. Newcastle University, on 03 Oct 2018 at 11:29:14, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.009

has as

II f a u t Blaise

parier.

Pascal

(1669)

8 o

>

T h e

8 . 1

e m p i r e

l e m s

s o m e

tual

c o n t i n e n t s .

p a r i s o n s

o f c h a n c e t h r e e

i m p o r t a n t

h u n d r e d

literary parts

o f

w e

listen

t o

tests, p u r s u e o r

e v e n I n

t h e s e

g r o w t h

this

applications. m e r e self

w i n

p l a y e d p r e t e d in

s o m e

b e

t h e y

w e

roles, o f

w a y ,

a n d

as

b e e n

ability,

t o

a n d

o f

as

c e n t u r y

t h e m ,

o f

c o u r s e

s h o w s .

a

o f

a n d

t h a n

t o

l e n g t h e n i n g

c o m -

e c o n o m i c s ,

e v e r y

wall.

b u y

a n d ,

I n s o f a r

u n d e r g o

statistics

a c q u i r e d w e n t

H e r e

m e d i c a l

insurance,

w a s

classical in

e x c l u d e

t h e

in

o n c e

c e n t u r y

w a s

intero r

applications, A

b e e n

shift t h e

t h e o r y t h e

i n t e r p r e t a t i o n s

applications.

it-

a n a l o g y

as a p r o p e n s i t y ,

p r o b a b i l i t y o u r

b u t

a n d

insurance.

h a d

as

d i v e r s e

sufficient

particular

life

that

o f

n o t

p r o b a b i l i t y

o f

t o

e v o l v e d

m o r e

i n t e r p r e t a t i o n

f r e q u e n c y ,

o r

e v e r

e x p l o s i v e

h a n d - i n - h a n d ,

W h e t h e r

list

its

e n c o m p a s s e s

occasionally

a n d

t e c h n i q u e

H o w e v e r ,

t o

statistical

also

polls,

c o n c e p -

subjects.

t i m e

applications

It

p r o b -

b e l o n g

o f living i n d e x ,

t h e o r y

e v i d e n c e

w h o l e

sciences

practical

plausibility

fate

o v e r

a l m o s t

s t e a d y

seen.

in g a m b l i n g

cliometrics,

a n d

its

s a m e

t h e

t h e

rather

-

as a relative

legal

discredit

a c c u m u l a t e w i t h

all t h e

t h e

d e t e r m i n e d

practice,

has

s t a n d a r d are

h a v e

certainty,

o f

n i n e t e e n t h

at

social

political

applications.

w e

c o u l d

early

w e

s p r a w l s

h u m a n i t i e s .

p o n d e r

t h e

f o o t h o l d

b r e a c h e d

m a t h e m a t i c a l

i n t e r p r e t a t i o n s probabilistic

has

p r o b a b i U t y

n e w

e v a l u a t i o n s

a n d

t h e

f o l l o w e d

as

n o w

industry,

d e v e l o p m e n t s

t h e o r y

a n d

in

reports,

a n e w

as a d e g r e e o t h e r

e v e n

aspect,

h a v e

I M P E R I A L I S M

c o n q u e s t s

m e d i c i n e ,

e m p i r e

o f

t h e

-

n e w s p a p e r ,

T h e s e

critical

t o

law,

disciplines

e x i s t e n c e

t o

style

a g o

b e e n

c h a n c e

a n u n s t e a d y

natural

sciences, p l o t

the

m a t h e m a t i c a l

h a v e

w e a t h e r

p a g e s

o f

t h e

statistical

t h e

read

years

o f

t h e r e

in its d e s c r i p t i v e as

b e g a n w i t h

A l l

a n d

o f

o f

P R O B A B I L I S T I C

T h e

territories,

i m p l i c a t i o n s

in

c o r e

in

the

t e n d e n c y o f

p r o b -

A l m o s t

e v e r y

271

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The

272

a p p l i c a t i o n f o r m ,

e v e r

a t t e m p t e d

h o w e v e r

T h e

d u b i o u s

e m p i r e

o f

i n t e r p r e t a t i o n s S e c o n d , o u s

as

a t i o n s

w e r e

t h a t

h a d

effectively

e c u m e n i c a l

a n o t h e r

c a t i o n s t h e s e

as w e l l

v a r i o u s

cation. o f

o r

e x a m p l e , b y

A n a l o g y m i g r a t e d

o f

w a s

f r o m

t h e

b r i d g e

o n e

o v e r

t r a n s p l a n t e d c o n t e x t c u r v e

o v e r

t h e

s c a t t e r i n g

o f

o f

w e l l

for, a n d

w h e n t o

t h e

cules en

masse

t h e

c o m e t ,

as

a

p r o d u c e d

inaccessible

a n a l o g i e s

i n t e r t w i n e d

5.5, a r e

t h e n

t o

o f

t o

as

q u i t e

t h e

a n

o f

a p p l i -

a n d

m e r i t s eclectic.

t h e i r

s u b j e c t s N e y m a n -

t h e

o f

a

o f

a n d

2.5). J a m e s t o

t h e

t h e

t h e

as

original

a p p l i e d statistics, as

for,

as

say, t h e

m e a n

as a

t h e s a m e

" t r u e " M a x -

a n a l o g i c a l

c h a i n

d i s t r i b u t i o n i n d i -

i n d i v i d u a l

m o l e -

t e m p e r a t u r e

t a k e n

M a x w e l l , t i g h t l y

h e

w e l l

u n p r e d i c t a b l e s o

t h e

C l e r k

n o r m a l

u n i f o r m

a p p l i e d

t e c h n i q u e

u n d e r s t a n d t h e

a n d

r e p e a t s

d i s t r i b u t i o n

v a l u e

masse,

h o w

o f

social

a r o u n d

l i n k

Q u e t e l e t ,

r e v e a l i n g

t e c h n i q u e

t r u e

(see

en

t h a t

Q u e t e l e t

n o r m a l

gas. J u s t

t a k e n

m a r k s

t o

n o r m a l

p s y c h o l o g y

i n t e r p r e t a t i o n

" e r r o r s "

ideal

t h e

statistics. A

m u s t

v e r s i o n

t o

t e c h n i q u e s

o f

p a t t e r n

t h e

m e a n ,

p r o d u c e d

cases

a

a n d

t h e

a n o t h e r

statistical

explicit,

m a t h e m a t i c a l

f o r m ;

o f a n a t i o n

in

o f

A d o l p h e

statisticians

n a t u r e ' s

o b s e r v a t i o n

p h y s i c s

a s t r o n o m y

t h e

regularities

I n

i n

t h e

a d d e d

m o l e c u l e s

5.6).

c e n t u r y

is

p r o b a b i l i s t i c

retains

u n d e r s t o o d

c o n d i t i o n

social

w h i c h

w a n d e r i n g s

t o

w h e n

e r r o r s

social o f

T h e

e x a m p l e

a n o t h e r

a r o u n d

social

p r a c t i c e

p a r -

a p p l i -

relative

F i s h e r i a n

p a r t i c u l a r

p r o b a b i l i t y

e x a m p l e ,

B o l t z m a n n t h e

o f

as w e l l

m o r a l

a p p l i e d

(see

F o r

s c a t t e r i n g

L u d w i g

velocities

v i d u a l s

d o m a i n

a s t r o n o m e r s

say, t h e

t h e y

h i s t o r y

o b s e r v a t i o n a l

I f

w h i c h

i n s t r u c t i v e

o b s e r v a t i o n s

a

d i s t r i b u t i o n v a l u e

o n e

s u b s t a n c e

t e c h n i q u e .

p o s i t i o n

t h e

a p p l i c a t i o n .

d e s c r i b i n g

t o o k t h e

o f

a l o n g

s o c i o l o g y

a n d

t o

in

c e n t u r i e s

c o n t e x t

t h e

this

b e c a m e

t w e n t i e t h

t h e

t h e

o f

o f

6.5).

t o

i n

f r o m

a c o m b i n a t i o n

result

d o m i n a t e d

t h e

in

d e g r e e

a s t r o n o m y

d r a m a t i c

t i m e s

t h e

in

b u t

i n t e r p r e t -

n i n e t e e n t h

h a d

least

n u m e r -

statistics

still d e b a t e

a n o t h e r .

b e y o n d s e v e r a l

b e n t

t o

f r o m

a

at

discipline

d i s t r i b u t i o n is

m e a n t

t o

t h e

a

o f t e n

a n a l o g y .

i n t e r p r e t a t i o n

a n d

d i s c u s s i o n s ,

a n a l y z e

6.4,

a n d

e i g h t e e n t h

via

s h e d d i n g

a n d

s o m e

a n d

m a n n e r

as

in

years.

lines

this

t h e o r y

coexist,

t o d a y

t e c h n i q u e s

Finally,

i n t e r p r e t a t i o n s ,

u s i n g

(see

use.

m e a n i n g

a p h i l o s o p h i c a l

t h e o r e m

in

f o r m a l ,

p r o b a b i l i t y

p e a c e f u l l y

p e r s o n a l i s t

m e t h o d s

t h e

w h a t

p s y c h o l o g i s t s

B a y e s '

P e a r s o n i a n

in

t o

First,

a p p l i e d

p r o b a b i l i t y

r e s p e c t

w e l l

disciplinary

t h e i r

p h i l o s o p h i c a l

m e a n i n g s

P r o b a b i l i s t s

r e a s o n

o f

b e

a n d

i n t e r v e n i n g

p h a s e s .

t r u l y

g u i d e d

W h e r e a s

v i e w

t o

is alive t h e

a c r o s s

b e c a m e

w i t h

chance

i n

t h r e e

c a m e

t h e y

as m o r e

f r e q u e n t i s t

F o r

in

f o r m a l i z a t i o n ,

a p p l i c a t i o n s .

o r

g r e w

originally

a n d

o n e

r e p u t a t i o n

t e c h n i q u e s

subjects,

of

a p r o b a b i l i s t

b o r r o w e d

e x p a n s i o n

ticular

b y

its

c h a n c e

t h e s e

d i f f e r e n t

implications

a n d

( a n d

c o n t e n t

B o l t z m a n n , s u g g e s t i v e l y )

c o u l d

b e .

Downloaded from https://www.cambridge.org/core. Durham University Library, on 03 Oct 2018 at 11:31:06, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/CBO9780511720482.010

The

T h e r e across

are

n u m e r o u s

disciplinary

still s h o w

a n d

a c t i o n

-

o f

test

e.g.

leads

(see

reject

a h y p o t h e s i s

o f

h a v e

t h a t

o r

m i g h t

m e t h o d ,

p s y c h o l o g i c a l I n

s u c h

n i q u e s

m a y

m a y o f

c o m e

l i g h t

w i t h

a w a y

b e

t h e

o n l y

o n c e

d i s t r i b u t i o n

in

B u t

u s e r

n o r m a l

b e

b e

t o l d

a b o u t

t h e

(see

4.4,

t i e d

t o

T h e l a t i o n

field o f

s c r i p t i v e f e r v o r

7.2).

t h e i r

a

t o

o f

a r e

a

t h e

p a r t

o r

d e c i s i o n

e r r o r s .

w i t h

n o t

c u r r i c -

e x p e r i m e n t s

h y p o t h e s e s

k e e p i n g

o f

a c c e p t

d e m a n d

o f

a

c o u r s e

n e w

scientific

c o s t

B a y e s i a n

in

l i g h t

ideals

o f

t h e

o f

o f

t h e

e s t a b l i s h e d

t h e

practically

t e c h n i q u e s

b o t h

t h e w a s

o f

f o r

h i m

o f

a

a r e

m u l t i p u r p o s e

t o o l s .

h a s

facts;

n a m e l y ,

o f

a p p l i c a t i o n s

h a s

h o l d

in

o r d e r

is

for

n o r m a l l y t o d a y ' s

similar

t h a t s t o r y

analysis. h e r e d i t y ,

g e n e r a l

a

G a l t o n ' s

c o m m i t

f a c t o r

s o

b e c o m e

in

A

late

a c q u i r e d

F r a n c i s

a n d

n e w

F o r a n d

i n t e l l i g e n c e

a r e

n o

l o n g e r

a p p l i c a t i o n . o w e s

t h e

t h e

i n t e r p r e t a t i o n s

a n d

t h a t

discipline.

e v e r y t h i n g

w i d e s p r e a d ,

statistics

o f

T r o j a n

d e b u t

b i o l o g i c a l

t h e o r y

m a t h e m a t i c a l

statisticians

its

t e c h n i q u e .

d e s c r i b e d

a

s u c h

o f

specific t h e

t e c h -

c o n s e q u e n c e s

o f

e n t h u s i a s m

c o r r e l a t i o n

m e a n

t e c h n i q u e s

c o n t e x t s

n o r

fit

i n d e e d

m u s t

t h a t

o f

o f

h a s

s o m e t h i n g

h i s t o r y

g a t e s

S i n c e

it

t h e

t h e

n o t

d i s t r i b u t i o n

t h a t

v e r y

t o

t h e i r

v a r i e t y

c o n d i t i o n s

t h e

m a y

t h e

o r i g i n s .

c o n d i t i o n s

early

o r

a n d

c o n v i c t i o n

t h a n

i n t e r p r e t a t i o n

a n d

w i t h i n

n o r m a l

c e r t a i n

t o

a n d

m a y

a n d

m o r e

c o m p a r e d

a s s u m p t i o n s

disciplines

s u r e ,

t h e s e

t h a t

p a r t i c u l a r

m a n y

b e

c o n t e n t

n u m b e r

t h e o r y ,

analysis

o r i g i n a l o f

t h e i r

t o w a r d s

N o w

s u c h

f o r

s o m e

a d e c i s i o n

m i g r a t i o n ,

a l r e a d y

s h e e r

d i s t r i b u t i o n o f

f a c t o r

a r e

t h e

p a r c e l

S p e a r m a n ' s

p s y c h o l o g y e d u c a t i o n ,

a d o p t

w h i c h

t h e

c o u l d

a n d

a p p l i c a b l e ,

n e i t h e r

r e g r e s s i o n

t h e y

b e

a n d

G a l t o n ,

t h e s e

s o

p a r t

m i g h t

explicit,

o f

T o

t o

d i s t r i b u t e d .

w e r e

o f

a b o u t

B u t

e r r o r

l i n g e r s i n

t h e

t o

m a k e s

r e a s o n s

t e c h n i q u e s

t h e

m a r k s

t e c h n i q u e .

o f

o r

later,

agricultural

in

a n d

c o n c e r n i n g

usually

( a n d

t h r o u g h

a g r i c u l t u r e

a l t h o u g h

i n t e r d i s c i p l i n a r y

T h e

h o w e v e r

t h e

e n t h u s i a s m

historical

m a d e

a p p l i c a t i o n s

" m e r e "

in

in

F i s h e r i a n

r a n

c o n s e q u e n c e s

m o r e

chaining,

A p p l i c a t i o n s

p r o b a b i l i t i e s

a s s u m p t i o n s

e i g h t e e n t h - c e n t u r y m a n y

o f

a p p l i c a t i o n .

E v e n t u a l l y w o r e

cases

n o t

c o n t e x t t o

r o u t e

fertilizer

e s t i m a t i o n

revise

f o r

t h e

d e c i s i o n

c e r t a i n

c o n s i d e r e d

b u t

i m p o r t e d .

p a c k e d

o r

o r i g i n s :

practical

analogical

p s y c h o l o g y

e x p e r i m e n t ,

t h e

b e

t o

273

p r a c t i c e .

early

a r e

h o r s e ,

p e r m i t

s u c h

social scientist

e a c h

successively

e v i d e n c e

a

t h e

i m m e d i a t e

t h a t

scientific

after

t o o k

y e s - n o

u s e

Similarly,

n o

s o r t

m e t h o d s n e w

6.3).

o f

a d m i n i s t r a t i o n .

a

t o

chance

e x a m p l e ,

practical

t o

w h e t h e r

u l u m

usually

F o r

statistics

t h e s e

of

e x a m p l e s

e d u c a t i o n a l

t r a c e s

significance

o t h e r

b o u n d a r i e s .

N e y m a n - P e a r s o n i a n ) t r e a t m e n t s

implications

It

n i n e t e e n t h

m a t h e m a t i c a l

its

e x i s t e n c e

j o i n e d

c e n t u r y

t o

t o g e t h e r p u l l e d

p r o b a b i l i t y

t h e w h a t

a s u n d e r

t h e o r y

a n d

a c c u m u t h e in

d e t h e i r

e m p i r i c a l

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274

The

statistics.

T e c h n i q u e s

e n o r m o u s l y statistics a t i o n s

o f

a p p l y

t h e

s a m p l i n g

p r o d u c t s

t u r n e d

r e p r o d u c t i o n . as t h e s e t e s t i n g

o u t

T h e

n e w

t h e r a p y

traffic.

n o t h i n g .

A l t h o u g h

h u r t ,

h e r e

in

k n i g h t s

e r r a n t

8 . 2

T h e

W

o f

H

i n t e r p r e t a t i o n s

c a t i o n s

a r e

a

d i s t i n c t i o n t h e

b e t w e e n

r e c e i v e d

c o n c e p t ,

w i t h

i d e n t i f i e d

t h e s e

spectively, h a v e

a n d

b e e n

years, basis

c o n s e n s u s

I a n

H a c k i n g s ( H a c k i n g ,

p r o b a b i l i t y

in

c o n s i d e r a b l y

h o p e b e g i n T h e J a k o b s e n s e s ( o r

o t h e r s

1 9 7 5 ) .

will

d o

T h e s e

t h a t

o f

o f

its

little

this

m o r e

c o m p l e t e

a n d

in

as

it

are w e r e ,

m y r i a d

c e l e b r a t e d it

is a

a p p l i -

h a s

b e e n

J a n u s - f a c e d

C a r n a p

( 1 9 4 5 )

relative

f r e q u e n c i e s , A l t h o u g h c a m p s

T h e

in

r e -

t h e r e r e c e n t

d u a l i s m

is

t h e

e x p l o r a t i o n

o f

t h e

origins

o f

close

o f

t h e

h i s t o r y

o f

s i t u a t i o n

is

s t u d y

r e v e a l s

p o i n t

b r i n g

in-

r e a s o n

1 8 3 7 ,

s u b j e c t i v e

s i m p l e

t h a n

n o t

R u d o l f

o p i n i o n .

a p p l i c a t i o n s

t h a n

d o

P o i s s o n ' s

i r r e d u c i b l e .

a

e l e v a t o r s

t h a t

t h e s e

t o

H o w e v e r ,

a n d

M E A N ?

a n d

s t i m u l a t i n g

a n d

are,

b e l i e f

C a r n a p ' s

a b o u t

e v e r y t h i n g

p r o b a b i l i t y

a n d

w o r r i e d

3.7).

sides.

f r e q u e n t i s t

i n

v e r y

e x p e r t s

" c h a n c e "

b e

o r g a n i s m s

r e s e a r c h e r s

t h a t

b e h i n d

t h a t

o f

m e d i c a l

a b o u t

S i m e o n - D e n i s a n d

q u a l i t y

u b i q u i t o u s

r e g i m e n s

(see

lie

t h e

b u i l d i n g

f o r

t e c h n i q u e s

a n d

t e c h n i q u e s

a n d

c h a n c e

d u a l i s m

r e c e n t

b y

e x p e r t s

s u b j e c t i v e

t h e

c o m p l e x c a n

flexible

a n d

c o n s i d e r -

s a m e

o f

h a v e

t h a t

t h e

b i n a r y

o p p o s i t i o n

w o u l d

t o

c o m p l e x i t y ,

in

t h e

e n u m e r a t i o n

w e

o r d e r

t h a t t o

t h e

h e r e . first

g e n e r a t i o n

B e r n o u l l i , t h a t

d e g r e e s

m i n d s ,

w e

-

specific

g e n e s

as

u p o n

p r o b a b i l i t y

P R O B A B I L I T Y

f a v o r e d

c o n t e x t

m o r e

H e r e ,

t h a t

t h e

o f

d e g r e e s

b o t h

is

m e d i c a l

p r o b a b i l i s t s

t h e

h a s

p r o b a b i l i t y

s u g g e s t .

w i t h

in

rests

c r o i r e "

a n d

b e l i e v e d

m i l i t a n t s

t h e o f

sides

w i t h

S i n c e

d e

a m o n g

o b j e c t i v e

t h e

office

s e n s e

m a t t e r

lot.

" r a i s o n

w i s d o m

a

p r o b a b i l i t y

m u l t i f a r i o u s

a n d

a n

in

f o r

e l e c t o r a t e ,

o f

D O E S

o f

a n

a r c h i t e c t s a r e

i n f e r e n c e

T h e

c o n s u l t e d

e m p i r e

T

line,

a p p l i c a t i o n .

t h e

A

s e c o n d a r y . o f

a n d

w h e r e

b e

e x p e r t i s e

i n

p o i n t

t o

s u b j e c t

g e n e r a l

t h e

statistician

e x p e r i e n c e

t o

c o n c r e t e

b r e a t h t a k i n g l y t h e

l o n g

s a m p l i n g ,

o p i n i o n s

is as l i k e l y

as b y

c l a i m

t o

a s s e m b l y

Statisticians

t h e i r

a n y

a n

a n d

chance

a p p l i c a t i o n s

s e e m

political

b y

o f

c e n t u r y ,

m a t h e m a t i c a l

e l e v a t o r

c a n ' t

d o m a i n

c o n t e n t

t h e

t e c h n i q u e s , a

t h e

a n d

of

m e a s u r e m e n t ,

t w e n t i e t h

c o n t e x t

t o

for

e x p a n d e d

i n

implications

f o r

p r o b a t i v e

a l r e a d y

p e r t a i n e d

t o

o f p r o b a t i v e t h e y

w e i g h t

o f

w e r e o f

p r o b a b i l i s t i c

i n t e r p r e t e d d i f f e r e n t w e i g h t )

f r o m

p r o b a b i l i t y

k i n d s w e r e

i n t e r s u b j e c t i v e ,

this w i t n e s s '

w o r k s ,

o f

subjects.

states o f if

t e s t i m o n y

i n

n o t o r

m i n d

a

H u y g e n s v a r i e t y

D e g r e e s -

o r

o f o f

(see o f

d i s t i n c t c e r t a i n t y

r a t h e r ,

o b j e c t i v e t h a t p i e c e

t h r o u g h

states

1.3).

o f

T h e

c i r c u m s t a n t i a l

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The

e v i d e n c e f o r e

w a s

has

a s s u m e d

closer

K e y n e s '

logical b e

physical n o t

v a r i o u s

m o r t a l

r e s e m b l e

rather

q u i t e

as

close

l o n g t h e y

dictions

o f

strongly s u c h

in

T h e r e h a v e

o f

n o

a r g u m e n t

years J u s t

w a s

his

solar

a n a l o g y

balls,

o f

w i t h

17

a

p o i n t e d a

" F "

D e

insisted

c o u l d

a n

n o t

e q u a l b e

o r

b y

t h e

at

t h e

t i m e ,

18

Bernoulli's that

b e c a u s e

n u m b e r

ascribed

t o

o f

t h e

w e r e

inp r e -

D u r i n g

a n d

o f

this

is

still

probability,

s o

u n r e m a r k e d

" f r e q u e n t i s t " 1 7 1 0 in

w a s

o f

18

o f

a n

" M . "

u r n

w o m e n

c h a n c e " .

T h a t

o f

t h e

o b s e r v e d : 17

o v e r b y

p r o m a n y

c h a n c e . r e c o n -

probability,

d e s p i t e

"F."

filled

N i c h o l a s

p e r f e c t l y 3 5

m a d e

Y e t

s e r v e d

A s

w i t h

( D ' A l e m b e r t

discrepancy

enlist

c o m f o r t a b l y

a n d

a r g u m e n t . )

t o

c o n c e r n i n g

g o v e r n e d

b e

t o

" p r o -

service

t h e

as

o r

a t t e m p t

t h e

that

ratio

c a n n o t

birth

a n d

also

century,

field,

statistics w e r e

m e n

" m e r e

t h e

p r o c e s s

p l a n e t a r y

d e c a y

w e r e

statistics.

t h e

m a r k e d

p r o -

o b j e c t s

similar a r g u m e n t

a r g u e d

in

say,

t o

m a r r i a g e

will

instances

" M "

-

h u m a n

collectives,

n u c l e u s

m a r k e d

m e c h a n i s m a n d

like

i n t e r p r e t a t i o n s

d i e

b u t

P o p p e r ' s

applications

statistics

" c h a n c e "

p r o p e n s i t y

o r

o f

K a r l

t h e

o f

susceptibility

i n d i v i d u a l

A r b u t h n o t ' s

A r b u t h n o t

if

t o

f r o m

label

births

if

Probabilities

o f p r o b a b i l i t y

Bernoulli's

h u m a n

m e a n t

o u t

D a n i e l

i n s u r i n g

s y s t e m .

t w o - s i d e d

criticisms o f M o i v r e )

D a n i e l

n o t

drift.

e m p i r i c a l

i m p r o b a b l e

c h a n c e

m a r k e d

a n d

f e m a l e

f r e q u e n c y

B e r n o u l l i

e x a m p l e , J o h n

m a y

classic

as

n i n e t e e n t h

a n d

g e n e t i c

t w e n t i e t h - c e n t u r y f o r

t o

p h i l o s o p h y

t h e

c r i m e

mortality

t h e

o t h e r s

i n t e r p r e t a t i o n s

o f

m a l e

all

r a n d o m

p r o b a b i l i t y

t h e

d r o v e

t o

original

o f

are

a t o m i c

t h e

in

p s y c h o -

p r e d i c a t e d

w r i t e s

objects.

n o t i o n .

basis

t h e

w h i c h

a v e r a g e s

that a n

collectives;

f r o m

t o w a r d

t o

physical

statistics

p e r s o n a l

facility,

r e s p e c t

o f

current o f

A r b u t h n o t

w i t h

patible

t h e o r y

e x t r e m e l y

w h a t

ciled

in

d e s i g n , o r

o f

w i t h

a p p l y

the

Savage's

d e v i c e s

a p p l i e d

d e s c r i p t i v e

f r o m

o r i g i n s

o f

s o m e t i m e s

facility

o n

M a y n a r d

subjects,

as f r e q u e n c i e s

l o n g e v i t y

c o n v e n i e n t

m a t h e m a t i c a l

p o r t i o n

m e m b e r s

C o n s i d e r ,

single

original

i n t e r p r e t a t i o n

t h e

t o

b u t

t h e r e -

c o n t i n u o u s .

g a m b l i n g

t h e p r o b a b i l i t y

t h e

are still o t h e r

pensity."

t h e

t o

r e p r e s e n t e d

as

o f

individual

f r e q u e n t i s t

ideal)

d e g r e e s

B e r n o u l l i

facilities,

u n d e r s t o o d

are

h e y d a y

t o

a n d

J o h n

d i s t i n g u i s h e d

p r o p e n s i t i e s

t h a n

i n t e r p r e t a t i o n

early a n d

t h e

physical

t o

L e o n a r d

b e

o f

judges,

c e n t u r y

n u m e r i c a l l y

s y m m e t r i c

o r

all c o m p e t e n t

t o

also

275

d i s e a s e s . Q u e t e l e t's " p e n c h a n t s "

moyeri\

c o m e s

t h a n

s p o k e

J a k o b

chance

t w e n t i e t h

e v e n

also

facilities

t h e s e

"I'homme

sofar

e x a m p l e ;

s u c h

t h e

f o r

(as o p p o s e d

o r

probabilists

sole

h a d

p e n s i t y

real

of

s a m e

s h o u l d

objects: physically

t h e

b o d i e s

o f

c o n s i s t e n t ,

early

in

latter

probabilities

T h e

t h e

probabilities

T h e s e

internally

b e

affinities

logical

probabilities.

t o

implications

c o m -

identical a n a l o g o u s

A r b u t h n o t

a p u r p o s e ,

o f

m a r r i a g e a b l e

is,

a n

e v e n t

( a n d

n a m e l y age,

c a n n o t

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it b e

276

The

i d e n t i f i e d

as

o r

(see

d e s i g n

s e n s e

o f

a

c h a n c e 1.7).

c h a n c e : like

d e s i g n .

s e n s e

o n

T h i s

" c h a n c e "

t h e

w e r e

i n

m e n t w h i c h

t o

in

d o

T h i s

s h o r t

f r o m

t o

cast

w i t h

w a s

i n

a l o n e .

o n

a n c e

t h e

a n d

in

a n d

h i s t o r y ,

(1)

s e e m s

a r e

later

n a t u r a l

a b s e n c e

t h e i r

t h e i r

o f

e m p h a s i s

u s e f u l n e s s

t h a t

a n

t h e

for

a

t o

o f

1.2),

a n d

a r e

e v e n t

t h e y

a r e

first

familiar o f

will

t o

p e r s o n a l o n l y

s u b j e c t i v e

will o r

p a r t

t h e

s u r f a c e

n e i t h e r

i n d i s s o l u b l e

o f

a r e

s y s t e m

T h e y

j u d g -

e x p e c t a t i o n s ,

b a c k b o n e

p r o b a b i l i t i e s

a n

p r o b a b i l i t i e s

c o m b i n e d

s o r t s

S a v a g e ' s

b e t t i n g .

w i t h

t h e

f o l l o w

a n d

list,

n o t

o f

a

o r

t w i s t s

o n

i n

in t h a t

n o t

c o m e

i n t e r s u b j e c t i v e ,

o f

t h e

d e t e r m i n i s m ,

c a n

d e f y

b o t h

e x p e c t a t i o n

a n y

w e

o f

in

real a

t h e

m u s t

a n d

t h e o r y

a n d

s i m p l e

as

at

a

variability

s u r v e y

t h e

t w o

statistics

o r

o f

o f

r e l a t i o n s h i p s

e n o u g h

o n l y

a n o t h e r

p r o b a b i l i t y

m e a s u r e

f o r m

is

g e n e r a l i z a t i o n . o n e

f u n d a m e n t a l

first

m e a s u r e

it is still

i n t e r p r e t a t i o n

u n d e r s t o o d

t o

t w o ,

m a s t e r s

w h i c h

s u g g e s t

t u r n s

B u t

m e a n

u n c o m p r o m i s i n g

e v e n

t h o u g h t

t a x o n o m y .

also

m e a s u r e

a n d

b e e n

p r o b a b i l i t y

s e r v e d

m o s t

as

a

h a s

p r o b a b i l i t y

P r o b a b i l i t y

t h e

w o r l d ,

t h e

p r o b a b i l i t y

h a v e

a s c e n d a n t .

o f

i g n o r -

d e t e r m i n i s m ; c o u l d

a d m i t

stochasticity. b e t w e e n s e v e r a l

I n

p r o b -

p o s s i b l e

d e t e r m i n i s m .

u s e f u l

t o

m e t a p h y s i c a l

entific

w i t h

p u r p o s e

A r i s t o t e l i a n

F o r

w h i c h

t h e

(see

a n d

c e r t a i n t y ,

t h a t

8 . 3

It

like

d e p e n d i n g

t o

o f

w e r e

p r a c t i c a l

i n d e t e r m i n i s m

r a n d o m n e s s

b r a n d s

a g e n t s ,

c o n v i c t i o n o f

in

T h e s e

p r o b a b i l i t y

it is a

statistics

t h e

t h e o r y

o l d

s i m p l y

b y

called

v a l u e .

r e l a t i o n s h i p s

u n d e r s t o o d

ability

m e a n t

D a r w i n i a n s ,

s i t u a t i o n

o f

a c t i o n ,

v i e w

p r o b a b i l i t y

t o

t h e

n a m e ,

T h e y

a n d

t h e

h a r m o n i z e d

o r d e r

still

t h e

cause.

o c c a s i o n e d

F i n e t t i ' s

t h i n g s

historical

t h e i r

t h e n

t h e i r

d e g r e e s

list o f

T h e

d e

i n d i v i d u a l ' s

d e t e r m i n i s m

p o i n t

t o

e x h a u s t i v e ,

P r o b a b i l i t y

n o t

t o

o f

arise.

d o u b t

t h i n g s .

t h e

o u t c o m e

c o n c r e t e

s t a n d

t h e y

a n d

f r o m

u n l i k e

t h e y

w h i c h

far

a n

since

m a t h e m a t i c a l

call f o r

b u t

b y

c o n s i d e r a t i o n s

o r

p r o b a b i l i t i e s "

p r e f e r e n c e s

T r u e

e x p r e s s

o r d e r ,

c h a n c e

t h o s e

" p r a c t i c a l

p r o b a b i l i s t s

pass,

n o r

t h e

o f

p r o b a b i l i t i e s .

t h e y

i.e.

invisible,

c o n c e r n

t h a t

Paley,

o f

p e r t a i n e d

p u r p o s e ,

p r e s e r v e d

p r o b a b i l i t i e s

f o r m u l a t i o n s

cases

also

effect

t o d a y ' s

o f

-

chance

i n d e p e n d e n t l y p r o b a b i l i t y

W i l l i a m w a s

of

(4.3).

w e r e

o f

H e r e ,

v a r i a t i o n s

o r g a n i s m

T h e r e

e v e n t

a b s e n c e

t h e o l o g i a n s

implications

u s

t o

d i s t i n g u i s h

d e t e r m i n i s m ,

d e t e r m i n i s m ,

(4)

D E T E R M I N I S M

(2)

at

least

five

v e r s i o n s

e p i s t e m o l o g i c a l

m e t h o d o l o g i c a l

o f

d e t e r m i n i s m :

d e t e r m i n i s m ,

d e t e r m i n i s m ,

a n d

(5)

(3)

sci-

e f f e c t i v e

d e t e r m i n i s m .

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The

(1) t h e

Metaphysical

for

f u t u r e .

a

f u t u r e

h a s

t o

C l a u d e

B e r n o u l l i

i n

W r i g h t

d i d

n a t u r e ,

like

(2)

m a t i o n . ciple,

( o r

c a n t h e

n o

p a s t )

possibility

e q u a l

since

it

s t r e n g t h ,

e v e r

p r a c t i c e .

I n

this

sense,

h a r d l y

e p i s t e m o l o g i c a l t h a t

t h e

(3)

also

T h e

s o m e w h a t

r e t r o d i c t i o n ) :

p h e n o m e n a ,

Scientific f e a t u r e s o f

t h e

t h e s e

f e a t u r e s

t h e o r i e s

o f

t h e i r

b e

t o

b y

trivially

l a w s

a n d

as

w h i c h called t h a t (ii)

o b t a i n e d

for

o r

t h e

b e

classes is

p r i n t o t h a t

is

o n l y

t h e r e

is

p r i n c i p l e "

m o r e

s u c h

o p e n in

t h a n

a n

d e t e r m i n i s m ,

w i t h o u t

it c o m e s

a n d

l e a v e s

( o r

p h e n o m e n a

n o

m a k i n g

as n o

as t h a t

s u r p r i s e

L a p l a c e

a n d

o p p o n e n t s

o f

B i c h a t . b e t w e e n

m e t a p h y s i c a l

u n s a t i s f a c t o r y . m e a n s

e m b e d d e d

in

if t h e y

u n i q u e l y l a w s

f u t u r e

T h i s

w o r l d

o f

scientific

specify

(i)

a

a n d

w h i c h

p a s t )

is ( o r

o b s e r -

t h e o r i e s .

set

all o b s e r v a b l e f r o m

a n d

s i t u a t i o n

o f p r e d i c t i o n

usually

( o r

it

a r g u e ,

o f

t h e

f u t u r e

i n

s e e m

t h a t

clause

g o v e r n i n g

n e c e s s a r y

i n f o r -

p r e d i c t a b i l i t y

r u l e s

d e t e r m i n e

specify

m e t a p h y s i c a l

m e t a p h y s i c a l

p o t e n t i a l

d e t e r m i n i s t i c

t h e

t h a n

e s c a p e

d e t e r m i n s m ,

t o

e x t e n d e d

w o u l d

o f

in

4.2).

least

b e

w o u l d

d e t e r m i n i s m ,

d o e s

it

w e l l

s h o r t

false. H e n c e ,

c o u r s e ,

o n

a r e

" i n

d i s t i n c t i o n

is, o f

l a w s

o f

(see

at

c a n

d e t e r m i n i s m

q u a l i f i c a t i o n

f o c u s i n g

g e n e r a l

m a y

S e w a l l

p o t e n t i a l

that,

it,

v a r i a t i o n

ability

o r

c l a i m s

it

J a k o b

o p p o s e d

a b o u t

o u r

sight,

c e r t a i n

several)

latter,

o f

p h i l o s o p h e r s

p r e d i c t

effective

o b j e c t s

objects, c a n

t h e

t h e a n

a r e

B u t

like

e v o l u t i o n i s t

p o s i t i o n first

g i v e n

p h y s i o l o g i s t

h a v e

B i c h a t

c l a i m

" i n p r i n c i p l e "

a m o n g

d e t e r m i n i s m

m i t i g a t e d

s o m e

e p i s t e m o l o g i c a l

o f

A t

latter.

T h e

t h e

a c t u a l

s t r o n g e r

m e t a p h y s i c a l

reject

lack

e p i s t e m o l o g i c a l

v a b l e

o f

t h e this

e p i s t e m o l o g i c a l

d r o p

o u r

" d e t e r m i n a t i o n "

a b l e

o n e

also s u p p o r t

f o r m e r

o f

d e t e r m i n i s m

p r o t a g o n i s t s

B e r n a r d ,

b e

( p o s s i b l y

c a n

as

i n p r i n c i p l e .

will

w e

m a k e s

p r o v i d e d ,

w e

A g a i n ,

t h e

as

a

i.e.

d e t e r m i n i s m

t h e

O t h e r s

o t h e r

t i m e ,

t h a t

p r o b a b i l i s t s

is i n d e p e n d e n t o f

I n

t o

M e t a p h y s i c a l

1.4).

n o w

d e t e r m i n e d

effect

like

g i v e n

affairs

r e s p e c t

t h e

p h y s i o l o g i s t

basis

o f

a b o u t .

c o n s i d e r a t i o n s

m a k e s

i m p l i e s

w h e t h e r

since

t h e

r e t r o d i c t i o n .

e x p l i c a t i o n

r e t r o d i c t a b i l i t y )

e x p l i c a t i o n

t h e

d e t e r m i n i s m

m e a n i n g f u l

b y

that,

u n i q u e l y

w i t h

t o

p h e n o m e n a ,

f u t u r e .

o f

(see

state

a n d

past.

c l a i m

c o m e

p r o m i n e n t

L a p l a c e

determinism t h e

thesis

t h e

o r

t o

single

less specific

o n

e v e n t

s y m m e t r i c a l

w i t h

d e t e r m i n i s m

p r e d i c t

d e t e r m i n i s m ,

it

p r o p o u n d e d

t h e

e p i s t e m o l o g i c a l

f o r

b y

a n t i - p r o b a b i l i s t s

p r o b a b i l i s t i c

Epistemological

w e

i n c l u d e

o f

d e

M e t a p h y s i c a l

a

d e t e r m i n e d

S i m o n

277

b o u n d

a d d i t i o n a l

s h a r e

4.5), o r

t h o s e

f u t u r e

a n

m a d e

4.2)

o f

a n y

o n l y

scientists;

P i e r r e

(see

is

u n i q u e l y

(see

v i e w

w o r l d ,

is

chance

c h a r a c t e r i z e d

necessarily

c l a i m

a m o n g

o r

w h e t h e r

t h e

o n e

B e r n a r d

t h e

t h e r e

c o m p r i s e

o n l y

c o m m o n

o f

p a s t

of

is

w a s

g i v e n

S o m e t i m e s

u n d e r s t o o d

t h e

h i s t o r y

c o n s i d e r a t i o n

w o r d s :

is

determinism

a n t e c e d e n t

u n d e r

implications

o f

basic

p r o p e r t i e s t h e s e

t i m e s ,

o n c e

basic t h e y

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278

The

are

k n o w n

b e

ascertained

Scientific t h e

at a g i v e n t o

t i m e .

a n y

determinism,

claim

t h e o r i e s initial

can

t h e

b e

t o

desirable

o f

its

as

p o s i t i o n

credible

o r

n o t

N e w t o n

himself,

b e l i e v e d

their

faithful

their

b e

w i t h o u t

P l a n c k

c o n t r a s t e d

w i t h

t h o s e

the

scientist

d e l a y

E v e n

scientific

t h o u g h ,

a c c o u n t

b y

o f

l o o k

o f

n o t

c o m p l e t e l y

in

m o r e t o u s it

an

alike

c i r c u m s t a n c e

v e r s i o n

o f

e x i s t e n c e

o f

primarily

always

b e t t e r

b e

t o

scientific

(or

w h e r e

p r a g m a t i c )

d e t e r m i n i s m

is o n l y

s u p p o r t e d

i n d e t e r m i n i s t i c logical t o

e v o l u t i o n ,

causes,

m a c r o s c r o p i c d e t e r m i n i s m

t h e

a n d

S e w a l l

d e t e r m i n i s m , drift

t o

b e

c i r c u m s t a n c e s . rationally

is

s o

o f

c h a n g e s

b y

o f

o r

t o

T h e y

t o

t o

t h e

adjust

t h e o r i e s c o m e ,

in-

p h i l o s o p h e r -

c o u l d

reads:

b e

true

w a y s ,

o f

in

c o u r s e ,

that

it

is a n

t o

m i g h t

o p t i o n ,

s u p p o r t e d .

d e v e l o p m e n t

4.5),

since

all

d e t e r m i n e d O t h e r s

c o m p e l l i n g

s e e m that

b e

n o

t o

h a v e

t h e y

e.g.

i n t o

m a y

c o n t i n g e n t

t o

yet T h e o n e

in

b e

o f

that

w i t h

it

is

i n c o m M e t h o d -

(theoretical) t r o u b l e -

is

o n l y p o s i -

c o n f i r m e d

drift

b u t

f o u n d

c l u n g

as

acceptance

w h e n

b y

that

u b i q u i -

t h e

t h e

p r o b l e m

a

o n

r a n d o m

m u t a t i o n s

b y

as

empirically

o f

is

v i e w e d

d e t e r m i n i s m

o f

s a w

a n

attainable.

It g e t s

p r o t a g o n i s t

b u t

difference.

b u t

e v e n

e n -

p o s i t i o n

for

satisfied

b e

denial o f scientific

is g r e a t l y

o u t

relies

rest

scien-

situations

c o n s i d e r a t i o n s ,

t h a n

o f

false,

t w o

t h e

c i r c u m s t a n c e s ;

k n o w l e d g e

o r

w a t c h for

available

b a c k i n g

T h i s

W h e n e v e r

m a y ,

(see

actually

its acceptability

practical

t h e

t h e

c o g n i t i v e

r e s p o n s i b l e

p o o r l y

W r i g h t

5.8).

scientific

determinism.

that

q u e s t i o n s

T h u s ,

(see

o f

5.6)

t h o u g h

c o n f o r m

o u t l o o k m o r e

m a k e

physicists

w i l l i n g

t h e

d e t e r m i n i s m

t h e

w h o

(see

d i f f e r e n t

that

actual

theories.

m e t h o d o l o g i c a l

h a v e

b y

-

s o m e n o t

clear

t o

N e w t o n ,

d i d

fact,

o f

sufficient

w e r e

m o d e s t ,

d e t e r m i n i s m

if scientific i n d e t e r m i n i s m tively

in

f u r t h e r

a b s e n c e

E i n s t e i n

c o m p a s s

w o r l d ,

d i f f e r e n t i a t i n g

f u r t h e r

A l b e r t

n a r r o w

w h i c h

m o t i v a t e d

ask

k n o w l e d g e

ological

s u c h

w o r k

historical

(5.3).

d e t e r m i n i s m

theoretical

o w n

b y

d e t e r m i n i s t i c

o f

o f

c a n

c o m p l e t e n e s s .

o f

d e t e r m i n i s m ;

M a x w e l l

assertion

d e v e l o p

b e e n

t h e y

characterized

t h e

f o l l o w e r s

methodological

b e h a v i o r

p l u s

usually

M a n y

called

w i t h

m e t h o d o l o g i c a l

m a y

p l e t e

it

p o i n t

a n t i c i p a t i o n

the

b e

is

I n

a n d

c o m p l e x

o n l y

b y

c o g n i t i v e

u n d i s c o v e r e d belief

can

that

w i s h .

p r o g r a m

that

a n d

t e r m s

their

C l e r k

s u c h

in

c h a n g i n g

P e i r c e

o u r

v i e w

probabilists

t h e in

g i v e n

c o m b i n i n g

characterized m a x i m

e v e n

S a n d e r s

tific d e t e r m i n i s m h a n c e d

o r

t o

physicist J a m e s

C h a r l e s

(4)

beliefs

b e

w o r l d

h a v e

a l t h o u g h

m u s t

accuracy

scientific

M a x

m u c h

c l u d i n g

in

as

p h i l o s o p h i c a l

o f

w e

acceptable.

it,

s u c h

t h e as

t o

creed,

s h o u l d

o f

e x p a n s i o n

this

r e m a i n e d

features

is a p h i l o s o p h i c a l

d e s c r i p t i v e

f u r t h e r

chance

d e g r e e

c o m p l e t e

this

of

basic

d e s c r i p t i o n

m a d e

successes

obstacles

T h e

t h e n ,

that

implications

in

b i o -

s u b s c r i b i n g s u p p o s e d

t o

identifiable

m e t h o d o l o g i c a l

it d e s p i t e

a d v e r s e

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The theoretical that

it

d e v e l o p m e n t s ;

is

s o m e t i m e s

determinism Planck,

inspires

[1926]

1938, p p . (5)

T o

M a x

explicate

effective

several levels o f scientific versus

3, pp.

18).

that

o f

situation

at the second

level. F o r

well-defined

genetic

e n v i r o n m e n t ,

is,

the

change the

by

an

versa

1936,

pp.

( c o m p a r e 43ff.,

distinction

o f

the

that

to predict

certain

organisms

w e

have

or p r o d u c e

level

o f

occur

remain

restricted

by o u r

plant w i t h specific properties, w e w i t h

n o

c o m m i t m e n t

Effective the

to

determinism

p h e n o m e n a ;

or

the

o f

to a d o p t

claiming

cogni-

scientific

a deterministic

d e t e r m i n i s m

m a y b e local, referring t o a specified

global,

that,

in

spite

o f

in

general.

level or area

certain

in

the

w h e r e a s

p o s t - q u a n t u m

Nevertheless level

o f

strict

causal

mechanical

they n e e d

not,

macroevolution.

regardless

o f

the

for

c o m p l e t e

expansion

d e t e r m i n i s m

o f

the

each

m u t a t i o n

m a y

n o

this reason, a b a n d o n

o f

each

determinism

o f

chance

a n d

will

d e p e n d

d o

so.

at

the

r a n d o m ,

mutation.

n e e d

it h a s

b e e n

n o t

necessarily

taken

to, shake

against scientific d e t e r m i n i s m .

has only been affected

d e t e r m i n i s m

4.3),

the p r e c e d i n g distinctions a n d examples

It may,

primarily directed

(see

be

s i o n o f it, w h i l e l e a v i n g o t h e r s intact. I n g e n e r a l , t h e a d v a n c e o f has b e e n

D a r w i n

longer

m a y

o f

remain

d e t e r m i n i s m

m a c r o e v o l u t i o n

m i c r o d e t e r m i n a t i o n

e m p i r e

in general.

o f

evolutionists

Conversely

I n g e n e r a l , it is clear f r o m the

d e t e r m i n a t i o n

o n

the

indirectly. T h e c o m p l e t e

o f

that

subvert o n e

ver-

probability

Methodological

prospects

pattern

o f

violations

f o r all p r a c t i c a l i n t e n t s a n d p u r p o s e s . T h u s , C h a r l e s

believed

for

diverse

effective scientific

theories a n d techniques in various areas o f application, a n d hence again influenced

only

determinism, w h a t

counts

at

o n e

h o w e v e r , for

a n d

o f

against

theories.

structure

the

to

extent.

Also

removes.

it. W e

philosophical w o r l d

scientific

appear

t w o

T h e

fate

r e m a i n s o p e n , as l o n g as w e

w h a t

certain slack b e t w e e n t e r m s

or

A t

history

epistemological

any

m u s t

n o t

thinking

as defined

be

metaphysical specify to

exactly

observe

their articulations

discrepancies

o f probabilistic

o f

p r e p a r e d

views a n d

rate,

determinism,

b e

d o

a

stance,

scientific d e t e r m i n i s m , all a p p l i c a t i o n s o f scientific k n o w l e d g e will deterministic

the

p r a c t i c a l goals, say, o f b r e e d i n g

are free

truth

a

spon-

t a n e o u s l y a n d in a n u n p r e d i c t a b l e way. N e v e r t h e l e s s , as l o n g as o u r tive ambitions

a

situation

alterations

molecular

with

b e t w e e n

indeterministic

be able

help at

vice

a

s h o w s

methodological

conceivable

m a y

m u t a t i o n s

or

n e e d

level, b u t

the

attitude

as t h e level o f living

then,

first

His

w h e t h e r

[1929]

w e

example, w e

w h e r e a s

a n d

theorizing, such

at

example.

determinism,

1 6 5 - 6 ,

It

279

decide

determinism,

molecules.

deterministic

is a n

to

metaphysical

a n d

of chance

Planck

difficult

1958, vol.

1 2 - 1 4 ,

implications

b e t w e e n to

a

a in

t h e m

remarkable

above, w o u l d

s e e m

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280

The

t o

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ceived. t h e

o n

t h e

T h u s ,

w i t h i n

s e v e n t e e n t h

c o m p l e t e

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t h e

p r o b a b i l i s t i c s t i m u l a t e d

t h e o f

t h e

real

t h e

w o r l d .

w h e r e a s

science

p r o b a b i l i s t i c

w o r l d

v i e w .

r e m a r k a b l e

f o r c e

t e m o l o g i c a l

d e t e r m i n i s m

o w e s

t o

sense,

p o s s e s s

as

b e

this

s t r o n g

e v e r y w i t h

a

r u l e

w i t h o u t

g i v e n

t h e

t h e

t o

n e a t

o t h e r . issue

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a

d o

a r o u n d

1 8 0 0 ?

t e c t i v e

b e l t

h i g h e r

t h e

e d g e , less

s t a b l e

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t o

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a n d

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n o t

p h i l o s it l e d

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n o t

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w e r e

n o t

e a c h

c o n d i t i o n s

in

h a v e

c o n v i n c i n g

g e t

I n

this

a c c o r d -

L a p l a c e ' s

o f

a n s w e r

h a r d

c o r e

o f

a n d

s o m e

a n d

m e r g e d

c e n t u r y

t o

a n d

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t h e o r e t i c a l s u b s i d i a r y

s t a n d a r d s

a c c e p t a b l e .

p e r h a p s

e v e n

stabilized

a r e

for

a

e a c h live

t h i n k i n g flourishing

as a k i n d

o f

p r o -

p r o g r a m .

T h e

g e n u i n e

n e e d e d

W h e r e v e r

u n d e s i r a b l e ,

his

t o d a y .

scientific

s t a n d a r d s

w i t h

certainly

s e r v e d

d e t e r m i n i s t i c

g r o w i n g

m e t a p h y s i c a l ,

p r o b a b i l i s t i c

w a s

is t h a t p r o b a b i l i t y

t h e

r e m a i n e d

u n t i l

t h e

scientific

d e m o n

a n d

h a s

o p t i o n

r e l a t e

a n d

s e t t i n g ,

e s p e c -

C o n v e r s e l y ,

i n t o

f a m o u s

d e t e r m i n i s m

scientifically

l a c k i n g

ideals

i n t e l l e c t u a l

beliefs

t h e o r i e s ,

s y s t e m .

e n t r e n c h e d

d e t e r m i n i s m

b e e n

m e c h a n i c a l

p l a n e t a r y

d e e p l y

w i t n e s s

s e v e n t e e n t h

s h o r t

n o t

e p i s t e m o l o g i c a l

p h i l o s o p h i c o - s c i e n t i f i c

u r g e n t l y

a r e

t o

v e r s i o n

k n o w l e d g e

c o m p l e t e n e s s

b y

t h e

s c i e n c e

h a s

c u r r e n t

k n o w l e d g e

t h i n g

m o d e r n

b y

d e t e r m i n i s t i c

o f

p o w e r .

e p i s t e m o l o g i c a l

m o r e

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scientific

t h e

t h e

m a d e

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m e t h o d s

s o m e o n e t h e

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d e t e r m i n i s t i c

T h e

t o

o f

p h e n o m e n a

a p p l i c a t i o n

w o r l d

r e s u l t i n g

e m e r g e d

t h a t

b o u n d

t h e

s e r i o u s

t h a t

rise

t h o s e

t h e

s u p p o r t

a n d

t h e

n e c e s s i t a t e d

a s s u m e

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e p i s t e m o l o g i c a l

A r i s t o t l e :

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t h e

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o f

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t h u s

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law.

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in

w i t h

like

if

o f

p e r -

t h a t

h e n c e

t h e o r y

b e l i e v e d

p r o b a b i l i s t i c

specialized

c l a i m s

a

o f

t h i n k

a n d

i n e v i t a b l y

p h i l o s o p h i c a l

c o i n c i d e n c e

it

v i e w

u n l i m i t e d

w a s

successful

a c h i e v e m e n t s , scientific

o r

parellel

t h e i r

e r a

say,

W h e n ,

t h e m

w e r e

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d i s c r e p a n c y

e r g o d i c

p e r s i s t e n c e

a n

t o

m e t a p h y s i c a l

P e i r c e ,

if it is e s t a b l i s h e d

n a t u r e

o f

It is p l a u s i b l e

o f

o n l y

o f

o n e

in

f o u n d ,

d e t e r m i n i s t i c

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ially

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c o n c e p t i o n

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o t h e r w i s e .

a n y

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like

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d e t e r m i n i s t i c

w h o ,

t h e y

f r a m e w o r k

e x p l a n a t i o n ,

C o n v e r s e l y ,

t r a d i t i o n a l

k n o w l e d g e

p o s s i b l y o p h y ,

t h e

o f

w h e t h e r

e p i s t e m o l o g i c a l

o n l y

d e v e l o p m e n t

as

a n d

p r o b a b i l i s t s is t h e

a n d

t h o s e

a n d

m u c h

a n d

applicability

m e t a p h y s i c s

strict

n a t u r e

i m p r e s s i v e

chance

d i s c r e p a n c i e s ,

early

scientific practice

t h e o r y ,

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s u c h

of

m e t a p h y s i c a l

d e t e r m i n a t i o n

t o

c h a o s

o f

c e n t u r y ,

p r e s u p p o s i t i o n , ability,

k i n d

implications

a

f o r

k n o w l m a k i n g

c e r t a i n t y

a n d

w e l l - r e a s o n e d

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The

a n d

q u a n t i t a t i v e

d i s p e n s a b l e , science.

as

s o o n

light

o f

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i n v o l v e d . p o i n t .

w o u l d

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m a y

t h e y

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o n l y

statistics

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n a t u r e

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physicists

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a n d F r a n z

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ino n l y

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at

c u r v e

a s s u m p t i o n s . is

w i t h

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e r r o r

right, a n d

t h e y

d o

o f

c o n c e r n s

e v e n t s

in e v o l u t i o n a r y

it

o f

p a t t e r n

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b e i n g

d i s t r i b u t i o n s

m a t h e m a t i c a l

o w n

v e r y

m o r a l

t h e

t h e

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theory

o b j e c t s ;

t h e

free

o f

f r o m

n o t h i n g

t h e

p r o b a b i l i s t i c

o f

i n c l u d i n g

h a s

the s t u d y

far

v e l o c i t y

b e s i d e s

t h e i r

o f

w h i l e

e m e r g e d ,

u n d e r m i n e

scientists,

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o n e

a l a w l i k e

only,

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d i s t r i b u t i o n s

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t h e

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far

t h u s

p r o d u c e s

t o

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h u m a n

o b v i o u s l y

o b j e c t

this s e n s e

s u c h

listed

l a w

b e c a m e

p o s i t i o n

r e g u l a r i t i e s

level

d e t e r m i n a t i o n s , I n

h e

t h e

s h a p e

d i s t r i b u t i o n s t h e

e v e n t u a l l y

s u p e r p o s i t i o n

d e t e r m i n a t i o n s

tics

s o m e

v i e w s .

s t u d y

o n

e r r o r s

k n o w l e d g e .

o t h e r

its c o n c l u s i o n s . b e

o f

i m p o r t a n t

field

f u r t h e r

also

b e

a

o f

d e t e r m i n i s m ,

a p p l i c a t i o n s ,

is

o f

as e x p r e s s i n g

a s p e c t s

e x a c t

t r e a t m e n t

scientific

m i g h t

fact

t h e

a n

in-

h y p o t h e s e s .

-

e r r o r s

t h e i r

l a w

w h o s e

o u r

a p p e a r s

t h a t

n e g l e c t s

a n d

o r

o t h e r

( p o s s i b l y

u n d e t e r m i n e d ,

f r o m

p o s i t i o n

M a x w e l l

b e c o m e

A

t h e

w h o s e

o f

a n d

f e r e n c e s

S o m e

I n

i n t o

a s s e s s m e n t

t r u s t w o r t h i n e s s

o b j e c t i v e

s e t u p

d i s t r i b u t i o n s

clear

discipline

affect

Y e t ,

society, e x p r e s s e d

r e m a i n h a d

fact,

c a u s e s

e r r o r s .

probabilities

a t i o n

t h e

it is clear, h o w e v e r ,

d e s c r i p t i o n

level

a n

t h e

p r o b a b i l i s t i c

r e d u c e d

i n d e t e r m i n i s t i c

a c c i d e n t a l t h e

is

t o

scientific

t h a t

b e c o m e s

t u r n e d

bill, f r o m

a s s t r i c t l y epistemic

o b s e r v a t i o n a l

e x p e r i m e n t a l

u n a m b i g u o u s ;

o n

f o r

is

beliefs

t h e

e p i s t e m o l o g i c a l

e p i s t e m i c .

c u r v e ,

fit

e p i s t e m o l o g i c a l ,

(e.g.

b e

s e c u r i n g

p a r t ) .

s o u r c e s

t h e

o f

m i g h t

p u r e l y

t h e

c e r t a i n t y

W h e r e

t h o u g h

281

a n d

d a t a

u n o b j e c t i o n a b l e .

e v e n

t o

k n o w l e d g e

entities

is

n o r m a l

object,

o f

o u r

chance

i n v e s t i g a t i o n

statistical

i n t e r p r e t e d

d i s t r i b u t i o n

s o m e t h i n g t o

o r

o f

o f

a p p e a r e d

indefinitum.

i n t e r p r e t a t i o n

t h a t

b e

ad

q u e s t i o n a b l e ,

b r a n c h

d e g r e e s

r e s t r i c t i o n

p u r e l y

a

of

f o r m u l a t i n g

m e t a p h y s i c a l ,

is t o

d i m i n i s h e d

o f

t h e o r y

e r r o r s

r e l a t i o n s h i p s

b u t

as

P r o b a b i l i t y

o b s e r v a t i o n a l

I n

m e t h o d

implications

n o t

statisscien-

R e i c h e n b a c h , a n d

M a r i a n

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282

The

v o n

S m o l u c h o w s k i

g o n e

a

step

precision ation

further.

o f o u r

as

the

variation

a n d

implications

the

Since

as the

o f

w e

the

result o f

chance

mathematician discover

observation,

result

of

variation

they a r g u e d

m u t u a l

the

Richard

s u m m a t i o n

Mises, have

w h e r e v e r

that w e

cancellation

v o n

should

o f

o f m a n y

w e

force

v i e w

variations

e v e n the

d e t e r m i n -

rather

than

i n d e p e n d e n t

d e t e r m i n -

uncontrollable

variations

ations. T h e in

connection

nature

place

for

J a m e s ,

easily

b e t w e e n

associates

Peirce's

follower

a r g u m e n t

o f those w h o

h a d

o f physics, such

that

is

a n d

the

natural

friend,

presented

d e t e r m i n i s m

(James,

1884).

praised

in a question let

by

vincing

instantiation

the

as that

action

say

a n d

completely

identifiable

the

least.

m o t i v e s

freedom.

T h e

Decisions

reasons, role o f

all.

obtain

or

actions

hardly will in

a

con-

the

his-

in accordance

w i t h

one's

metaphysical

issue

remains

unresolved,

sumably T r u e ,

b e c o m e

there

scientific f r o m

the

w h a t e v e r T h e

ever

is

d e t e r m i n i s m

an

a n d

ideas.

m o r e

other

o f

i m p a c t

recent

with

be

o f

to

f o r all o t h e r

m a n y

like

triggered

o n

this

is w h a t

o f

the

o f

h u m a n

determinism

probabilistic

1986, for

first

theory

a n d

observable

w e

will

a n d

theories, freedom.

influences

W h a t e v e r

the

a recent and that was

applications,

genetic

material.

a small scale. W e

Since

such

the truth

careful

universally

indeterministic including

devices

tech-

natural can

be

d e t e r m i n i s m is v i o l a t e d , a t l e a s t may, h o w e v e r ,

o f

resulted

by a t o m i c o r s u b a t o m i c processes, a n d

o f

a b o u t

d e v e l o p m e n t

scientific

therefore

p r e -

observe.

t h o u g h t

strongly

o f determinism.

the

will

d e t e r m i n i s m

indeterministic

(see E a r m a n , was

d e t e r m i n i s m

with

erosion

conceptions

f o r m s

this

metaphysical

that interferes

built a n d such processes exist, effective suitable cases a n d

rate,

o f

effective

significant

as

scientific

any

strand

mechanics

m u t a t i o n s

A t

scientific

irreducibly

nological devices processes

o u r

l o n g

w i t h

f u n d a m e n t a l

theories o f physics

to

respect

m o r e

o n

fate

assessment), q u a n t u m recognized

loose.

i n d e t e r m i n i s m

e m e r g e n c e their

m o r e

the

as

correlation

i m p o r t a n t

B u t

present prospects a b o u t

the

b u t

to

to

will p e r h a p s accept or reject metaphysical d e t e r m i n i s m freedom,

a m b i g u o u s

c o n n e c -

as o p p o s e d

are

free

But,

O n e

o f

r e m a i n e d

after

possibly

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m i g h t

a

this day.

conception

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theories

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a

W i l l i a m

Conversely,

o f free

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Peirce. free

indeterministic

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alone

accidental

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in

the spell o f successful deterministic

controversial,

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as Pascual J o r d a n ,

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as is t o b e e x p e c t e d with

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against

b e c a u s e it s e e m e d

f r o m

itself

free will. M a x w e l l

forceful

tion

i n d e t e r m i n i s m

plausibly claim

in

that

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it is still p r e s e r v e d electric s h o c k s that

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283

F o r , ordinarily,

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of chance

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single

t h e

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a t t e n t i o n

M o r e o v e r ,

a larger

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certainly

o u r

o n

implications

p r e -

e n v i r o n -

is

b a s e d

d e t e r m i n i s m

o n o n l y

marginally. B y is

implication,

h a r d l y

t h e

i m p a i r e d

p r o c e s s e s .

O n are

t h e o r i e s

s o m e

b y

deterministic. finding

s u c h

t h e

as

o n

t h e

t h r e a t e n e d

physical

stricted

a l t h o u g h A t

this

part,

o f

T h a t

O f

t h e y

h a d

are

radically

t h e o r i e s

c a n u n d e r m i n e

o f

figuration, f r o m

N o t

t h e

is

a n d

q u a n t u m

in

t h e

a d d i t i o n c o n f i d e n c e

e p i s t e m o l o g i c a l

insights

o r

reactions

w o r k d a y

related

t h e

strikes

also

o r

a

a n d

p r a g m a t i c

t o

q u a n t u m

physicists

(cf.

m e t h o d o l o g y

o n t o l o g i c a l

b l o w

t h e

clearly

practical

a l m o s t

o f

r e f u t e d .

i m p o r t

has

o f v i e w

m a i n l y

t r u t h

o t h e r w i s e

s i t u a t i o n

distinct

are

p u z z l e s

o f

rare n o t

like

m e t a -

q u a n t u m

this

as

theory,

in

t h e

v i o l a t i o n

occasions.

c h a n g e d

the q u e s t i o n

a n d

against

Y e t ,

case is

I n

re-

o t h e r

dramatically,

is o n e

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e p i s t e m o l o g i c a l

indistinguishable

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o f

m o r e

i n d i s t i n g u i s h a b l e t i m e

as

principle.

d e t e r m i n i s m

c o m p a n i o n s

s y s t e m s , initial

a n o t h e r

also

m a d e

s y s t e m s t h e

in

b u t

as has b e e n

s u c h

c o m p l e x

l i m i t e d

r e v e a l e d

m e c h a n i c s ,

c o m p l e x

c o m p l e x i t y ,

radically w i t h i n

also

d e t e r m i n i s m ,

m e c h a n i c s

a l o n e

(practically)

d i v e r g e

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m o d e r a t e let

a n d

c u r r e n t

E u r o p e a n

a n d

e l e m e n t a r y

in

t h e

less

i m -

d e t e r m i n i s m .

w a y .

s y s t e m s

spirit

m e t a p h y s i c a l

b e c o m e

p o r t a n t

o f

o n

t h e

a n d

g r a n t e d

w a s

e p i s t e m i c

classical

v e l o p m e n t s

c o u r s e ,

c o n t r i v e d

t h e r e f o r e ,

t h e y

d e p e n d

g e n e r a l

m e t h o d o l o g i c a l

that

interest

c o m p a r i n g

m e c h a n i c s

a metaphysical p o i n t

p o i n t ,

after

h e y d a y

overall

f r o m

b y

o f

t h e o r y

t h e

A m e r i c a n

d e t e r m i n i s m

specially

t h e

b e t t e r

in

single

r e p l a c i n g

m e t h o d o l o g i c a l

p r a g m a t i c

i n d e t e r m i n i s m ,

t o

w o r d s :

s h o w n o f

o f

likely t o

o n

o f

p r o s p e c t s

c i r c u m s t a n c e s ,

t h a n

r e a l m

t h o s e

o r

d e t e r m i n i s m

duality.

d e t e r m i n i s m .

effective

as

i n d e t e r m i n i s m

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e p i s t e m o l o g i c a l o f

true

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m e t h o d o l o g i c a l

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inclinations

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as g o o d

a t h e o r y

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m e c h a n i c s

except basic

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m e t a p h y s i c a l n e e d s .

-

that

d e t e r m i n i s m

in

a d e q u a c y

a n d

classical clear

c h a o s

(classical!) c a n

b e

spans. T h e

physical

b y r e c e n t theory.

t h r e e - b o d y

unstable,

c o n d i t i o n s

n o

a n d

d e t e r m i n i s t i c

that

is,

d e E v e n c o n start

n e v e r t h e l e s s s t r u c t u r e

o f

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284

The

t h e

t h e o r y

s y s t e m s ,

d o e s

like

e x c e p t i o n s . c a n c e , t h e y

like

a r e

n o t

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t h a t

o f

t h o s e t h e y

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b y

t h o s e

t h e o r i e s all

p s y c h o l o g y

a r e

t h e o r i e s , t h a t

t h a n

o n

w i l l i n g

is

m u c h

interpretandum.

e n a b l e

u s

t o

c o n c e i v a b l e

n o t

h a v e

a

j u d g i n g t o

is

t h e

m o r e

will

d e p e n d

a d d i t i o n a l t h e

ties

a p p r o x i m a t i o n s

r e -

t h e m s e l v e s , as a m a t t e r is

n o

t h e n

o f

less

fact,

t r u e

for

b e h a v i o r ,

o r

m a x i m s

m e t a p h y s i c a l

o f

scientific

w a s

o n

w e

m e n -

i n c l u d e

if t h a t

p r o p e r t i e s

o f

in

m e t a p h y s i c a l

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o n

h o w

just

i n t e r p r e t a t i o n

solely

its o b j e c t s ,

o b s e r v a b l e

as

d e t e r m i n i s m .

d e t e r m i n i s m t o

o f

s o m e t i m e s

will d e p e n d

b e t w e e n

case

u n a m b i g u o u s . d e t e r m i n i s m

a r e

d e f i n e d

t h e

t i m e

b y

for It

is

i n d e t e r m i n i s m ,

h a s

less

a

o f t e n

r e m a i n

is

t h e

c e r t a i n l y

m a t h e m a t -

s t r u c t u r e

t h e s e

d o e s

o b j e c t s

t h a n

n o t

i n

a n y

o f

those

w a v e

states

d e s c r i b e

it d o e s

n o t

p o s i t i o n a

u n i t e

a n d

d i f f e r e n t

this

p r e c i s e

v a l u e s

m o m e n t u m n a t u r e .

state

o f

H e n c e

I f

f e a t u r e

t h e

f u n c t i o n

t o

m i s g u i d e d

o n t o l o g i c a l

is

m a x i m a l

o f

t h e

a

c l a i m

for

T h e o r

states o f

i n

o f

a

m a x i m a l d e t e r -

s o

v i e w

t h a t o f

it t h e

c h a r a c t e r i s -

m i c r o - r e a l i t y

a g a i n s t

t h e

s p e c i f i c a t i o n

state,

as i n d e t e r m i n a t e

particle.

t h a t

c e r t a i n l y

o f all m a c r o s c o p i c a l l y a

m e c h a n i c s ,

r e m a r k e d

c o m p l e t e .

S c h r o d i n g e r

d e v e l o p m e n t

q u a n t u m

b e e n

a n

o f

o n e

a s s u m p t i o n s

b e

b e

I f

also,

t o

s i m p l y

m e t a -

a p p l i c a t i o n s

resistant,

d e t e r m i n i s m

o u r

assigns

p a r a d i g m

i n t e r p r e t e d

like

o f

p h e n o m e n a .

e c o n o m i c

m a y

tics,

m e c h a n i c s

e x c e p t i o n

t h e o r i e s

a realistic i n t e r p r e t a t i o n ,

t h a t

p r i n c i p l e ,

q u a n t u m

a n d

u n d e r

fact

i m p l y

d e t e r m i n i s t i c

o f i m p o r t a n t

m i n i s t i c . M o r e o v e r ,

b e

a r e

t h e o r y

s e v e r e d

b a s e

a t h e o r y

t h e

o f

specification,

w o u l d

t h a t

a p p l i c a t i o n .

m i c r o s y s t e m

b e

signifi-

n o t

o f

realistic i n t e r p r e t a t i o n

It

o f

d e t e r m i n i s m ,

d e t e r m i n e

e n t i r e l y

b r e a k d o w n

o u t .

w e

for

t h a t

C o n v e r s e l y , is

c a r r i e d

P i c k w i c k i a n

ical s t r u c t u r e

y e t

T h i s

o f m e t a p h y s i c a l

A f t e r

o n l y

s o m e w h a t

a d o p t

b e l t

t h e

criteria

t o

t h e

e p i s t e m o l o g i c a l

d o e s

m a t t e r

t h e

o f

r a r e

a s s u m p t i o n

explicitly.

h o w e v e r ,

o f

a n d

a

as i n d e t e r m i n i s t i c ;

t h e

are,

t h e o r y .

u n s t a b l e

t h e

t h e y

physics.

a s s e s s m e n t

h o w

a n d

o f

e l e m e n t s

d e t e r m i n i s m , a r e

p a r t s

b i o l o g y ,

w i t h

a s s u m p t i o n s

c o n s i d e r e d

t h e

p r i m a r i l y

r a n g e

c o m p l e x

as

as

q u a s i - s t a b l e

practical

d e t e r m i n i s m

p r e d i c t i o n s ,

w i d e

a d d i t i o n a l

b e

f o r

I f w e t h e

t o

o n

d e t e r m i n i s t i c

n o t

o r

w h a t

o f g r e a t

s y s t e m s ,

is

t h e

stable

f o r

e v e n

scientific

it

r a t h e r

p o p u l a t i o n

i n t e r p r e t a t i o n

t i o n e d , t h e

t o

fully

d e t e r m i n i s m ,

p r o b a b i l i s t i c

M e t a p h y s i c a l s t u b b o r n .

t h e

a

C h a o t i c

a p p l i c a t i o n s

c o n t a i n

e v o l u t i o n a r y

b u t

r e c o g n i z e d

c h a o t i c ,

b e

t h a t

o f

c o n t r a r y ,

t o

cliche,

t h e o r i e s

c o u n t

n o w

l o n g - t e r m

f o r m s

p h y s i c a l

w i l l i n g

q u i r e d

all

t h e

d e t e r m i n i s m ,

classical

is

D e s p i t e

u n d e r m i n e s

p h y s i c a l

a n d

t h e

p h e n o m e n a

c o n c l u d e

p r e c i s e

chance

o f t e n

b y

d e t e r m i n i s m .

p e r m i t

n e v e r t h e l e s s .

a r e

p r o v e

c o v e r e d t o

of

cases; o n

s y s t e m ,

w e a t h e r ,

e p i s t e m o l o g i c a l n o t

s u c h

p h e n o m e n a ,

a d e q u a t e l y

T h u s

d o

solar

M a n y t h e

b a r

implications

m a y

d e t e r m i n i s m

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The

s h o u l d

b e

n a t u r e

c o n d i t i o n a l

o f

t h e

W h a t

t w e e n

m i c r o s t a t e s

still

I n

v i e w

a d h e r e

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t o

a n d

t o

t h e i r

a n d

t h e

o f

(see

h a s

t h e

w i t h

t h e

t h e

t h e

m e t h o d ,

o f

o f

t h e

e r o s i o n

b e

t h e

sciences

g r a d u a l l y

t h e

t h e

p r o p o s i t i o n s ,

m e n t s

T h e

a n d

ideal

n e w

p h e n o m e n a ,

o r

t o

t h e

b e u s e

T h e

rise

r u l e

o f

d e r s . tice

f u r t h e r .

m a d e :

T h e r e

scientific

r e t r e a t

h a d

w a s

a n d

b e

v e r y

t h e o r y , t o

t h e

b e

t h e

w h i c h

flexible

in

t h e

o n e

c o n d i t i o n s

v e r s i o n

t h e n u m -

o f

laws,

s o m e

t h e

r u l e o f

c h o i c e

a n d

e x -

b u t

n o t

e x p e r i -

s o r t

o f

A

t o

t h e

c h o i c e

n u m b e r s ,

d e t e r m i n a t i o n .

w a s

t o

in

w e a k e n e d

necessary.

a t least

this

d e m o n s t r a t e d

sciences

o r d e r

B u t

o f

recalcitrant

i d e a

h a n d ,

o f

b y

d e t e r m i n i s t i c ,

t o

1.4).

m a t h e m a t i c a l

Scientific

w i t h

set

f r o m

o b j e c t s

t h e

b e c a m e

b e

s u g -

d e t e r m i n a t i o n .

n a t u r a l

d e t e r m i n i s m , o n

a

m a t h e m a t i c s

t o

s e c t i o n ,

a r t i c u l a t i o n

m u s t

b e

n u m b e r s

( s e c t i o n

s t r o n g e s t

t o

t h a t

p r e s u p -

n a t u r a l

t h e

a n d

this

n a t u r e

s u c h

o f

t h e

i n d i s p e n s a b l e

c e n t u r i e s ,

clearly

m o r e

d i s s o l v e d

science

t o

o f

o f

m o r a l

d e t a c h e d

c o n v i n c -

m o d e r n

m a t h e m a t i c s .

a p p l y

m o r e

o f

p o w e r f u l

f r o m

limits h a d

b e

t h e

m e t h o d

d e t e r m i n i s m

b e t w e e n

c o n t e n t

t o

o n e .

n o n - e p i s t e m i c

r u l e

in

b e g i n n i n g

c o n f r o n t a t i o n

t o

f r o m

r e n d e r e d

in p h i l o s o p h i c a l

t h e

k n o w l e d g e

t h e

o r d e r

m a r k s

t r a d e - o f f

m e t h o d

b o t h

t o

d e s c r i b e d

less

claim,

a g o .

still u n d e r s t o o d

n a r r o w

p r o b a b i l i t y

is a

in

t h e

c e n t u r i e s

n i n e t e e n t h

in

o r

is a h a r d

h a s

t h e

o f

w h i c h

t w o

e x p r e s s i o n

as

for

d e t e r m i n i s m

c h a r a c t e r i z a t i o n

just

t h e o r i e s

m a y

case

scientific

m o s t

t h e m s e l v e s

t h e

o f

c o r e

e v e r

o f

b e -

q u a n t u m

m o r e

n a t u r e

t h e m s e l v e s

e x p a n s i o n

t h e

o f

t h e i r

this

t o

f o u n d

a n d

scientific

scientific

t o

belt:

s e e m e d

w e r e

w e r e

I n

e i t h e r

n u m b e r s

if n o t

a

o f n u m b e r s o f

t h e

d e t e r m i n i s t s

p r o t e c t i v e

scientific

A t

n i n e t e e n t h - c e n t u r y

t h a t

h a d

t h a t

o b s e r v a t i o n s still

o f

d o w n

h i s t o r y ,

d e t e r m i n i s m

a n d

ideal

necessary.

several

p e r f e c t

m a t h e m a t i c a l l y ,

its

b e

assimilate

p h i l o s o p h i c a l

lost

c a n

classical s y s t e m s ,

n a r r o w e d

k n o w l e d g e

t h e

d e t e r m i n i s t i c

p r e s s e d

o f

a c c o r d i n g

p r o p e r t i e s

i n d e e d ,

c h a o t i c

g l o r i o u s

n a t u r e

d e t a c h e d -

o r

e n o r m o u s

o f

that,

m e t a p h y s i c a l

m a y ,

t h e

g e n e r a l i z a t i o n :

fact

o b s e r v a b l e

s u g g e s t e d

o f

e i g h t e e n t h

o f

t o

o f

a r g u m e n t s

t o

b e

a n d

applicability

d u r i n g

f o r m

clarification

c o r r e s p o n d e n c e

e p i s t e m o l o g i c a l

c o r r e s p o n d i n g l y

s e e m e d

t o

g r a d u a l l y

d e t e r m i n a t i o n o f

u n d i s p u t e d

T h e y

D u e

p i c t u r e

m a t h e m a t i c a l

b e r s

h a v e

p r o b a b i l i t y

f o l l o w i n g

p o s i t i o n

285

o n t o l o g i c a l

r e s o l u t e

u n s t a b l e

its l o n g

c o m b i n a t i o n

c o m p l e t e

A s

also

m e t a p h y s i c a l ,

8.1)

g e s t s

o f

d e v e l o p m e n t

c h a r a c t e r i z e d T h e

s i t u a t i o n ,

c o r e .

o f

t h e

d e t e r m i n a t e

t h a t

o f

it

i n t e r p r e t a t i o n s

f u s i o n

t o

w e i g h t

is

p r i n c i p l e s .

c l a i m s

N e v e r t h e l e s s ,

ingly,

chance

p r e v i o u s

m a c r o s c o p i c a l l y

this

o n t o l o g i c a l t h e

n o

a n d

o f

p h y s i c s

d e t e r m i n i s t i c elusive

a

h o w e v e r ,

m e c h a n i c s ,

s y s t e m s .

u p o n

of

m i c r o w o r l d .

r e m a i n s ,

q u a n t u m

implications

m a d e

e x t e n d

i n

o f p r o g r e s s

its

scientific

t h e

-

t h e b o r p r a c -

a d a p t a t i o n o n

t h e

o f

o t h e r .

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The

286

8 . 4

T h r o u g h o u t v e r s u s

t h e

u n c e r t a i n t y

relationships: the t o

ability also

t h e o r y

n o

cations h e r e

a

certain

t h o s e

w h o

a n

o f

o n

a b o u t

ations

t o

t o

in

a n d

i n f e r e n c e s

a b o u t

S i n c e s u c h

as

d r a w i n g

his

ence. s o u g h t t h e m

T h e

m o d e l b y

t h e

o f

t o

w h e n

s o u n d

w e

t h e

these o f

t o

a

b a d

h a v e

b e e n

T h e

f r o m

o f

b e l i e f

h a v e

h a v e

s e e n

a r m e d

t h e

m u d d l e - h e a d e d w i t h

in chapter

his

since w e

d r e a m a

T h e r e

t h e o f

t h e r e f o r e , i n f e r e n c e

k i n d s as

all o f

o f

situ-

t h e

h u m a n

t o

i n v e s t -

Bayesian, t h e m

d r a w

shall d e s i g n a t e

t h e m

theirs t h a n

o f

f o r m s

t o

o f

b e

o f

r i g h t - t h i n k i n g ,

o f

1, w h e n

sure,

e v e n

p r o b a b i l i t y

o r d e r t h e

t h e

a

f o r m

o f

for

inferP o i s s o n

t o

m a k e

e n l i g h t e n e d

c o m p l e x i t y )

as a

a c o n c e p t i o n

w a s

C h a r -

i m p o r t a n t

t h r o u g h in

o f B u t

t e c h n i q u e s

o f s u r p a s s i n g

uncertainty, itself

(or

it is t o d a y .

m e c h a n i z e d

B e r n o u l l i

m a s s e s

a calculus

a U n i v e r s a l

battery are,

J a k o b

a p r o b l e m

t h i n k i n g

e l i m i n a t e

i n c l u d i n g

s t r o n g e r

w i t h

c o n c e i v e d

u n d e r

for

sciences

m a k i n g

m o d e r n

f r o m o f

o f

b e e n

realize

a n d

rules

inference.

d r e a m e d

t o

classical

that

B u t

uncertainty

a n d

T h e

t h e

c o n -

u n c e r t a i n t y

v a r i e d

vary,

m e t h o d s .

uncertainty.

is, t h e y

also

past e x p e r i e n c e ,

n o w

c o n f r o n t e d

as

appli-

t h e

m e c h a n i z e

o p i n i o n .

t e s t i n g in

rules

t h e

that

irrelevant

o r

c a n n o t

t o

are

t h e o r y

s u c h

has,

p r o b -

certainty

p r o v i d i n g

o n e

a i m

a p p l i e d

i n d u c t i v e

able

are

i n f e r e n c e

T h e y

standardize)

b y

e l i m i n a t e

i n f o r m a t i o n

m a d e

it is

in

t h e o r y

T h e s e

frailty

accept

rules

d o

( a n d

i n t u i t i o n s

t h e

t h e s e

h y p o t h e s i s

issue.

u n c e r t a i n t y ;

b u s i n e s s

t h e y

p r o b a b i l i t y

H o w e v e r ,

h u m a n

their

d e t e r m i n i s m

p r o b a b i l i t y

applications

p u r s u e .

probabilists

t h e

u s e d

v e r s u s

g o v e r n e d

belief in

o f

certainty

d e t e r m i n i s m

w o r l d .

u n d e r f r o m

that has n e v e r

u n d e r

aid. T h a t

f u r t h e r

lation. A s

s t e m s

o f

i n d e t e r m i n i s m

applications

w h a t

f r o m

n e v e r

successors

available

a m e c h a n i c a l

a c t i o n

f u t u r e

b e t w e e n

their

uncertain

situation,

rules

w a s

c o d i f y

t h e m s e l v e s

w e i g h

a d r e a m

classical

t o

an

o f

traditionally

p h e n o m e n a

A l t h o u g h

business.

i n f e r e n c e s

d i f f e r e n c e s

b e s t

probabilists

L e i b n i z

acteristic,

the

t e c h n i q u e s

inferences,

o p p o s i t i o n

that

a d m i t t e d

N e y m a n - P e a r s o n i a n

Leibniz,

w h e r e a s

effect,

t o

t h e

t o

u p

d e c i s i o n

In

r a n g i n g

Fisherian,

o f

a n d

t h e

s u c h

d e c i s i o n s

w h o

s o m e

t o

o f

g i v e

t h e

d e t e r m i n i s m / i n d e t e r m i n i s m

rationalize

itself,

collectively

in

c o n d u c t .

h o w

w h i c h

c o n d i t i o n m e n t

a n d

c o u r s e

t h e r e b y

t o

u n c e r t a i n t y

intrinsic

w h a t

t h o s e

i n f e r e n c e

m a k e

a b o u t

a s h a d o w

r e f u s e d

m e a s u r e

w o r l d .

belief

like

I N F E R E N C E

t h e o r y ,

u n p r e d i c t a b l e

t h e

that

a n d

chance

c o m p l e m e n t a r i t y

a p p e a r a n c e

the

g i v e n ,

o p i n i o n

a n d

certain

w h e t h e r

u n c e r t a i n t y

a n d

a

deal w i t h

rational

c l u n g

A

s t a n d

struction

o f p r o b a b i l i t y

u n c e r t a i n t y ;

m a k e s

t a k e

as

h a s

face o f variable m e a s u r e

of

M E C H A N I Z E D

h i s t o r y

indetermi'nism.

implications

as

m a t h e m a t i c a l

m a d e

plausible

implicit

calcu-

results o f probability

t h e o r y

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The

w e r e

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t h e

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A l t h o u g h t h e t o

t h e

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i n t u i t i o n s

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c o m m a n d :

e v e n

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social

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g a v e

in disciplines

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r e a s o n i n g .

h o w e v e r ,

a b o u t

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m e t h o d s ,

case o n

o f t h e

a n d

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physicists

t h o s e

p s y c h o l o g y , e r r o n e o u s

that

its

w a r r i n g

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i n f e r e n c e

is a

t h e

relative

m e t h o d s .

w a s

silenced

precisely

T h e y t h e o f

that

w e r e

n o t

c o u r t r o o m rival

f o r m s

o f

statistical

sensus,

neutrality,

are m o r e

W h i l e

a d m i x t u r e

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cisions

are

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p r o b l e m s

statistics

t h e o f

t h e

t o

o f

t h e

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allure

In

s u c h

t h e

F i s h e r

e x p e r t s

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t h a n

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that

s e e m

F o r o f

r e a s o n s

statistical

a n

o c c a s i o n a l

c o n t e x t s

w h o

a r g u e

t h e

lean that

n o n e t h e n o

m e a n s

i n f e r e n c e

s t a n d i n g

utility-based

b e t t e r

e n -

geneticist.

o f statistical

B a y e s i a n

c o n -

a

It is b y

revises

in

d e -

biologists

p r e c e p t s

C o n v e r s e l y ,

o f t e n t h a n

practical

a f o r m

o n e

e v i d e n c e .

tests

o w n

rational

w a s

w i t h

B a y e s i a n

their

statistics

practical

o f

p s y c h o l o g i s t s

d e f y

c h o o s e

sort

h i m s e l f

ears.

b l a n d i s h m e n t s

Certainly,

m o r e

m o s t

t h e

i n f e r e n c e

their

s c h o o l s

statistics, in

a n d

p r e c i o u s .

v a r i o u s

rests

Fisherian,

c l o s e d

illusion

it

t h e

i n t o

statistical

t o

in

m o n o l i t h i c ,

B a y e s i a n

m o r e

c o n s e n s u s

d i v i d e d

m o m e n t o u s

t h e

is e v e n

always

n e w

o f

their

c o n s e n s u s

since

are

Bayesian,

a p p l y i n g

Fisherian

i n t e r p r e t

N e y m a n - P e a r s o n

e v a l u a t i n g

o f

in

s h o w s

w a s

statisticians

balance,

( C u r i o u s l y ,

d e c i s i o n s basis

i n f e r e n c e

t o

i n f e r e n c e

for

6

b e e n

difficult

n o t

p r e t e n s e s ,

p s y c h o l o g i s t s

b e c a u s e

b e c a u s e

c h a p t e r

false

areas o f application.

scientists s h o u l d

o n

A s

claims

h a v e

t h e

settled

c o r r e c t

u p o n

b u t

attain

as

disposal,

t o

is m o s t

theories,

are just as d e a f

a n s w e r s

p r e f e r

irrational

t o y e s - n o

h y p o t h e s e s

t h e

N e y m a n - P e a r s o n ,

Fisherian

that leads

office

p r e s u m e

e m b r a c e d

instead

m e r i t s

b e n t

w h o

n e v e r

fact,

t h e

statistics

m e t h o d s .

I n

s u b s t a n t i v e ,

b y

a n s w e r .

t e c h n i q u e s

u n d e r

strife,

in

t h a n

specialized

B a y e s i a n

o b v i o u s w h y

h a n g

s a m e

n a k e d

i n t r o d u c e d

T h e s e

statistical

inference.

u n i q u e

scientists

subjects

less u s e

a n d

Fisherian

social

t o w a r d

m a y

historical

h a v e

c o u n t e r e d

their

lives

e m o t i o n

c o n s e n s u s

a n d

since

d o c t o r ' s

o r

their

t h e

at e v e r y o n e ' s

still rests

c o u l d

B u t

E x p e r t s

t h e

w h e r e

i n f e r e n c e

alone.

o r

cisions

that

it

that

u n i q u e .

N e y m a n - P e a r s o n i a n

basic

a p p e a l

statistics.

c o n s e n s u s

w e r e

o v e r

in

a c h i e v e d ,

a s s u m p t i o n

a n s w e r s

c a m p s

o f

principles

s a m e

at

t h e o r y

t h e

physicists,

p r o b a b i l i t y

scientists,

P r o b a b i l i t y t o

t h e

w h e r e

n o t

m a t h e m a t i c i a n s

spectacles w e r e

it w a s

u n i q u e n e s s .

scientists,

t h e

statistical i n f e r e n c e

e n l i g h t e n e d , a n d

m e n ,

i m a g i n a t i o n

statistics. Physicists a c c e p t e d Social

o r

a l o n g

always o f

287

intuitions.

m e c h a n i c a l ,

f o r m s

neutrality,

successful

it

a n d

t h e

t h e

d e s i g n e d

d i s t o r t i o n s

m o d e r n

n o t

a t e l e s c o p e

it w a s

j u d g m e n t s ,

of chance

o f r e a s o n a b l e

m o d e l ,

w h a t

b e c a u s e

t o

intuitive

their

s e n s e

m e c h a n i c a l

original. J u s t

w a s

implications

s u i t e d

m e t h o d s .

t o

o f d e t h e

A c c i d e n t

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288

The

c r e a t e d in

a

t h e

a s s o c i a t i o n s

single,

t h e m

i n

T h e o n c e

s t e a d y

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a

O f

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a m b i g u o u s statistics, areas

c o u r s e ,

o f

t h e

sciences

tive

a s s o c i a t i o n s

O u r

c o n t e m p o r a r y

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a s p i r e ter.

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O n c e

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t h e

set

t h e

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t h e o r i e s

t h e

will

t o

b e l i e v e

u n c e r t a i n t y

s o l u t i o n s

w i t h

It

false

h o p e s ,

t h e

d e a l

t o

f r o z e

s h o u l d

t o

r e p l a c e

f r o m

h a s

b e e n in

t h e

Fisherian

i n f e r e n c e .

u n c e r t a i n t y i n f e r e n c e

N o

are

statistical

i n f e r e n c e ,

a n d

a b o v e

responsibilities

t h a t

e v e r y

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a l t h o u g h

f a s c i n a t i o n for

w i t h

t o

s o m e

b y

b l a m e o f

u n a n i m i t y

in

t h e

t h e i r

m e c h a n i z e d t i m e s

t h e all

t h e

largely o f

b y

o n

a

a b s e n c e

n o r m a t i v e

infer-

statis-

objectivity. A l l

t o

i n f e r e n c e

g u i d e

m u s t

testing,

a p p l i -

i n t e r v e n e

t h e

a l t h o u g h

r e d u c t i o n

o f

h a v e

i n f e r e n c e

s t e m s

o f

a n d

just

o f

t h e

for

o f

h o p e

f r o m

legero f

t h e g r e a t

e x i s t e n c e

o f

c a l c u l a t e d

o b j e c t i v i t y

t o

a v o i d i n g

t h e

j u d g m e n t

e n -

statisticians s h a r e d

p r i o r

s u c h

o f

o f

p e r s o n a l

m a t h e m a t i c a l

t h e

m u c h

c o n f l a t i o n

t h e

o r

t h e o r y ,

m a t h e m a t i c a l

f r o m

t e c h -

t h e i r

N e y m a n - P e a r s o n

o f

t h a t

c h a r a c -

j u d g m e n t ,

o f

i g n o r a n c e

n u m b e r

t h e

t e c h n i q u e s

j u d g m e n t o f

s u b j e c t i v e .

m e c h a n i z e d

illusion.

e x e r c i s e

strife,

a n d

d e s c r i b e

b y

j u d g m e n t

p e j o r a -

n a m e

b y

o f

i n

its

s t e m s

b y

p r e c i s e l y

w i t h

certainty,

f e d

w a s

t h e o r y

d i s c r e t i o n ,

a m o u n t

i n t o

t h e

r i d d i n g

h y p o t h e s i s

t e c h n i q u e s

e x p e c t a t i o n s

it

t o

j u d g m e n t

null

r u l e s a r e

o f

t o

case

t h e

t a s k

t a k e n

is a n

B u t

p r o b a b i l i t y

statistical

t h e

p e r p l e x i t y

t h e

d e c i d e d ,

c o n s e n s u s ,

b e

in

g o o d

c r i t e r i o n , in

it,

p r o b a b i l i t y

m e t h o d .

b u r d e n

d r e a m

a i m e d

j u d g m e n t o f

t h e

s u i t e d

t h e

h a v e

o n c e

for

S i n c e

t h a t

t h e

j u d g m e n t

i n

m a t h e m a t i c a l

d e f i n e d

t h a t

u s

D e s c a r t e s '

idiosyncratic,

objectivity,

w h e r e

g u i d e

called

ideally

o n e s ,

w o u l d

y e a r n i n g s

s e e m e d

t h e o r y

t o

a n d

g r e a t e s t

u n i q u e

i n t e r s u b j e c t i v e

o f

areas

m a t h e m a t i c a l

u n c e r t a i n t y .

w a s

m o d i c u m

o f

o f

s i t u a t i o n s

o f

in

r u l e s

a m b i g u i t y ,

g r e a t

B a y e s i a n

T h e s e

t h e

s u r p r i s i n g

e s c a p e

statistical

tails.

a

a i m s

t r a n s f o r m

o p p r e s s i v e

case

i n f e r e n c e

d e c i s i o n

in

as in

o f

n o t

a

h i s t o r y for

arbitrary,

significance

e x p e c t a t i o n s .

t h e

a n d

u n d e r

m e t h o d s

daily life o f p e r s o n a l

applicability

p r o b a b i l i t i e s

a p p e a l

t h e

o n

level o f

d e m a i n

o f

n o w

n i q u e s

t o

r u l e s

p r o b a b i l i t y

c o u r s e ,

a g a i n

i n f e r e n c e

t h e

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t h e n

m e c h a n i z e

i n f e r e n c e

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a n d

t h e r e f o r e

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tical

m e t h o d ,

y e a r n i n g

e l i m i n a t e

all.

e l e m e n t s ,

It

t h e

f o r m s ,

statistical

t h e

e n c e .

for

o f

u n c e r t a i n t y

first

o f

chance

a n d

statistical

m a t h e m a t i c s

w h e r e

h e a v i e s t ,

o f

l e i t m o t i v

c a n

w a s

field

m e t h o d

a d v a n c e

statistics.

t h o s e

of

place.

a n d

a n d

b e t w e e n

u n e q u i v o c a l

p r e v a i l e d

least

implications

t h e m .

m o r e

c e r t a i n t y

f o r

t h e s e

R a t h e r ,

w i d e s p r e a d in

u n c e r t a i n

c i r c u m s t a n c e s .

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The

8 . 5

T h e s e

a n d

statistics

a n d

t h e

m a t h e m a t i c s

c o m e

is

w h e t h e r

b o t h

t r a n s f o r m e d

t o o t h e y w e

w e

risk

a n d

o v e r

a r g u e

o u r

p o i n t s ,

m u c h

a

a n d

life

c e n t u r y ,

t h e

J o h n

m a n ;

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o f

t h e

R o y a l

diarist.

p a g e s

pre-statistical w h e r e v e r t h e

c a t h e d r a l a n d

e r e c t e d

in

9 0 7

m e n

7 5

k e e n l y

o f

t h e

o f

n u m e r i c a l ,

b u t

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c o u l d

in

t h e

a n d

t h e

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basis

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a

t h e i r

o u t -

v i e w s

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o f

c o n a r e

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w h a t

Weltanschauung.

Y e t

h a r d l y

m a k e

n o t i c e

u p

w a y

for

w a s

o u r

o f

for

its

m i n d s ,

life

is

t o o

c o s t

t r a v e l o g u e

" p o p u l o u s "

o b j e c t s

are

p u r c h a s e d

a n d

t i m e .

o f

c a n

h e h e

feats

h a v e

m a t t e r

y e t a n d

T h e y

a

for

n u m b e r s

h i g h ,

3 2

o b e l i s k a n d

e v e n

a n d

D u t c h

c e n s u s e s

feet

l a b o r

m o r e t o

o f i m -

t h e

in-

a l t h o u g h

h e

rivals,

t h e

o f

recently

t h e

n u m b e r

e n t e r e d

y e t

feet

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o f

m o d e r n

bell

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visited,

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o f

fix

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t h e

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b e

f r o m

n o t

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t o

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p r o g r e s s i v e

a

a v i d

13

late

h o r t i c u l t u r e ,

t h a t is

t h e

a n d

a

t h r o u g h

a n d

o f f "

cities

s u b j e c t

fire

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t h e

not

t o

p u r p o s e s ,

3 7 , 9 7 5

n u m b e r s

w a s

scientific

e x a m p l e ,

t h a t

c o m m i t m e n t s

r e t u r n

E v e l y n

r e c o r d e d

t a l k ' d

its

still y o u n g ,

o u r

life

b e e n ,

briefly

o f

factual

p r o s p e r i t y

t h e

h a s

u s

d e v o t e

a n d

R o m e

t h e

b u t

d o u b t

statistics

t h e

statistical

t h e o r y

see

p o u n d s ; in

o f

w o r l d ,

a n d

L e t

learn,

m u n d a n e

at

b e

" s o m u c h

p r o d u c t s

h a v e

a

p r o d u c t i v i t y

o f his life in L o n d o n , p r o b a b i l i s t i c

o f

E v e l y n ' s

w o n d r o u s n o t

w a s

B u t

n u m e r o u s

i n d u s t r y

d i m e n s i o n s

indices.

in

i n t e r e s t e d

t h e i r

w e

S q u a r e

n o

for

t r a n s f o r m a t i o n s

c h a n c e

( 1 6 2 0 - 1 7 0 6 ) .

d i a r y

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o u r

a t t i t u d e s

a r r o w

a n d

o f o n

p r e c o n d i t i o n s

a n d

a n e w

o f

s o c i e t y

i n t e r a c t i o n s ,

T h e s e

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f o r t u n a t e l y

h a d :

h o r s e s .

c o u l d

relief.

E s q .

4 0 , 0 0 0

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N o w h e r e

h a b i t a n t s

i n f e r

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w e i g h s

S t

b e

p a r s e

t h e

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eye.

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n e w

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e m p i r e

p r o b a b i l i t y

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c o u l d

o f

a n d

p r e s s i v e .

is

eyes.

t h e y

a r o u n d ,

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b r e d

sciences,

t h a n

fellows.

w h a t

a n d ,

t h e

c o h e r e n t

w e

t h e

i n t o

E v e l y n ,

tourist,

t h e

o u r

w h e n

i n d e f a t i g a b l e I n

j u d g e

s p r i n g

in

b e y o n d .

t h e

w a y

it w i t h

s e v e n t e e n t h o f

i n t o

c a t c h

a

o f

causal

t h e s e

t h e

i m p a c t

P r o b a b i l i t y

Lebensgefuhl

t h e

t o

c o n t r a s t

i n t o

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b o r n

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c o n s e q u e n c e s

d a y s

s u m

u s ; o v e r

o f

if w e

t o

age.

w o r l d

w e r e

T h e

t a n g l e d

r e a s o n i n g

w i d e

t h e

m a t h e m a t i c s

q u e s t i o n .

statistical

a n d

t h e

b e e n

d o m i n i o n

B u t

a

289

d i s t i n g u i s h

f r o m

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in

is m o r e

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it is t o

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W h e t h e r

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chance

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clear:

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ideas, o r

in

s h o w

p r o b a b i l i t y

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S T A T I S T I C A L

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statistics

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h e

m u s t

canals. r e a l m

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T h e t h e

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life

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b a s e d

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t o w a r d s a n y flat

t h e

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o r

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290

a

The

m e t i c u l o u s

s u r e d .

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d r o u g h t ,

f u r t h e r

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D u r i n g

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it

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r e g a r d

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it

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t h e

m o r e t h e

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singular.

H i s

t h e

rare,

t h e

a n d

streets

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lifespan. II,

l o n g e v i t y

e x p e c t a n c i e s

B r i t i s h

in his

dis-

g o v e r n m e n t ' s

p r i c e

L o n d o n . b u t

t o

( s e v e n

years'

t h e

t h e y

e v e n t

is

t h e

u p

o n

c a n t o

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t h e

t h e i r

l u c u l e n t

t a b l e

m a n a n d

d i f f e r e n t

fac-

full

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i n d i -

p a r t i c u l a r s .

p r o b a b l y

o b s e r v e d

t h o u s a n d s

a

f r o z e n

a s t o n i s h

is g r a n u l a r , in

w i t h

a n a t o m i c a l

e x q u i s i t e

s p e a k

w h i c h

c r a m m e d

" e m i t t e d

Statistics

w h a t

t h e

e m p i r i c i s m ,

set

t h a t

w o r l d

i n d i v i d u a l

o f

s h o p s

a p p r e c i a t e d

t h a n

S o c i e t y

C h a r l e s

typical

s t r i k i n g :

c a n d l e " ;

E v e l y n ' s

closely

life

d i a r y

a g e m s t o n e

t o

a g e d

s o m e

p r e s e n t e d

n a t u r a l

n o t

s a m e

t h e

w a x

sizes

R o y a l

t h e o f

t h e

a n t h r o -

2 0 .

i n s t a n c e ,

h e a v i l y

t o

t h e

a v e r a g e

w a s

b r a n d

s m a l l

t o

E v e l y n

w a i s t c o a t

H a l l e y

a n

years,

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w i n t e r ;

i s o l a t e d

o f

m e a s u r e

p a i d

t o

E d m u n d

g r a n d s o n ,

his

h a v e

t o

t h a n

a n d

c l o t h i n g

n o t i o n

tables.

L e y d e n ;

as a

w e i g h t

i n

his

a t t e n d e d

w h e n

h a d

m a n

n o v e l ,

e v e n t s

a r o l e

filter

b r e e c h e s

r a t h e r

s u b s c r i b e d

f o r e i g n

t e x t u r e

c o r r e s p o n d s

t e n d e n c y

o f

a m b a s s a d o r

t h e

t h e y

s t a n d a r d i z e

p r e s e n t

w o u l d

b i t t e r

large

M o r o c c a n

h u m a n its

w e r e

u n u s u a l l y

o b j e c t s

a

U n i v e r s i t y

sensibilities.

v i d u a l

as

n o

e v e n t s

t o

w e r e

H i s

r e g u l a r l y

H a l l e y ' s

h e

p a r t i c u l a r

d e s c r i p t i o n s

t h e a t e r

1 6 9 4 ,

7 4

a v e r a g e s

u p o n

v i v i d

in

e x t e n d e d

c o u l d

a n d

b e f o r e

t h e y

t h r e e - s c o r e - a n d - t e n

f r o m

issue

t o

h e

c o m p u t e d for

as

o f

S o c i e t y

E v e l y n

w o r l d .

c o n t e m p o r a r i e s ,

ideal

h o w

i n d e e d ,

s e a s o n s

n a t u r a l

a t t e m p t e d

d i m e n s i o n s ,

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life

a n d

-

t o

R o y a l

scientists

E v e l y n ' s

e m p i r i c a l

h e

t h e

in-

c h a n c e

m o m e n t o u s

n e v e r

c h a n c e

s e r v e d

A l t h o u g h

m a y

t o

d u e

case

n o t e d

b a s e l i n e

f o r

o t h e r

e a c h

causes.

f i g u r e

later. a n d

a t t r i b u t e

t h a t

b u t

b e

c o m e :

F e l l o w ,

n a t u r a l

n o t

c e n t u r i e s

t o

p h e n o m e n a

o f

d u l y

t o g r a n t

systematically.

d i d

a v e r a g e s

sessions

o f

l o a t h e

a n d

as

s u r r o u n d i n g

E v e l y n

i n d e e d

t h i n g s

u n i f o r m

p o m e t r i c

w a s

effects,

g r o u p

w a s ,

m i g h t

c h a n c e

chance

m e t e o r o l o g i c a l

p r i n c e s

variability

t h a n

A v e r a g e s w e r e

o f

h e his

t e n u r e

s u b t l e

as r e l u c t a n t

s t u d y

o f

his

effects

r e c o g n i z e d

w e r e

d e a t h s

o f

of

c i r c u m s t a n c e s

H e

c o m e t s

signs

a n d

b u t

m e m o r y .

t h a t

t h e

e l u s i v e

t h e t h a t

s t o r m ,

d i v i n e

c o i n c i d e n c e ?

m o r e

a n d

a d m i t t i n g

n e c t i o n

o f

g a r d e n e r

his o w n

n o n e t h e l e s s

implications

o f

t h e o r

H i s

u n i v e r s a l

r e p o r t e d

faceless

in

cases

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The

s u m m e d h a v e o n

u p

in

statistics.

B u t

t o

t h i n k

a r g u e

l e a r n e d

t h e m

t h e y

b u t

for

t h e

f u n d a m e n t a l t h e

b e l i e v e t h e

in a n d

t o

t h e

It

is

a n d

p u r p o s e s

w e t o

t o

d i f f e r e n t

a

o f

t i m e s ,

tyrannically. m i n d s a n d

o r

statistics

w e

tics o f

T h i s

infallible, o f

r e a c h e d , as

a r e

t h a t

e x i s t e n c e .

m a r g i n

w e

it

m u s t

T h e s e -

d e e p

-

t o

t h u s

g r e a t e r

t h a n

t o

at

w e

c o n f e r t h e

e x p e r i e n c e t h a t

o n e ,

int h a n

-

w a s

w e o f

collectively

t h e

i m p r e s s i o n

t h e

a c c i d e n t

l a n g u a g e

statistics traffic

s h a p e s

r e s e a r c h ,

o u r

n o t

beast,

o u r

a

a n d

t h i n g s ,

a n d

t o n g u e .

e m o t i o n .

u s u a l l y f o r

t h a t

safety.

n a t i v e

p u b l i c

b u t

o f

a u t o m o b i l e

c o n c e r n i n g

is

still

d o

I n

c l i n g

c e r t a i n

t o

p u b l i c

d e e p - f e l t

i m p r e s s i o n s

t o

n u m b e r s .

S i n c e

D i c k e n s '

( 1 8 5 4 ) ,

h a v e ,

t o

settle

d i s p u t e s

a

s h o r t

t o o l s

all.

a b s o l u t e

w a s

o f

f o r

F r o m

o r

g e n e r a t i n g

s a m e

all s u c h

p e r s o n a l possibility

t o

b u r d e n

at

local

o u t s e t , f o r g e

is

t h e

t h e

w o r s t ,

m e l d

m a n y

t h e

i m p e r s o n a l

a

t r u l y

n e i t h e r

w h e n

h o p e i n t o

injustice

o f

t h e

h o n e s t l y

a n d

fear,

p u b l i c in

social

u n i v e r s a l

B e c a u s e

least

o f

I n

a

P r o b a b i l i t y

f o r

e x p e r i e n c e o f

m i s t a k e n

fiat.

civic p a s s i o n s .

decisions,

t h e

it

a n d

t o

i n

o n e :

f o r c e

f o r

alive

c o n v i c t i o n .

i n d i s p e n s a b l e will,

t h e

t h e

a n d

irenically;

p u b l i c

w a s

a n d

h o w e v e r ,

at

e x e r c i s e d

s h o u l d e r

all t h a t

n o n e

g e n e r a l

s u b m e r g e

f r o m

T h e y

c a r r i e d

t h e

w a r m - h e a r t e d

for

t h o u g h t

u p

t h e

a shift

f u n c t i o n

t h e

cast

a r e

f r o m

w e r e

e d g e s

i n t u i t i o n s

c o u n t

a v e r a g e s ,

s t o p p i n g

s u m m o n s

t o

t o

t o

i n v o k e d

R o u s s e a u ' s

a n d

i n

m a y

l e a r n e d

i n d i v i d u a l s

versatile

s t o m a c h

is

if it

s t r a n g e

h a v e

a v e r a g e s ,

a n n u a l

e v e n

e m o t i o n s

t h e i r

w e

u n t u t o r e d

t h e

v i s i o n

a l t e r n a t i v e

t h a t

h o n o r

d e c i s i o n s ,

this w a s

P e a r s o n

collectively

l e a n i n g s ,

i n d i v i d u a l

w r o t e

d i s c o u r s e

all e m o t i o n s .

w e r e

m o s t

n o t

collectively

g l o b a l

s h a r e d

i n t o

K a r l

b u t

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n o v e l

cases,

t o

o u r

Times

f u n c t i o n s

t h e

is

f r o m

t h a t

u n c e r t a i n t y

m u s t

a n d

all

if

t h a t

f r o m

f e a r e d

o n e

E v e l y n

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pointillist

a b s e n c e

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k n o w l e d g e

n o r

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s i n g u l a r

o b s e r v a t i o n s

Hard

t h e s e

t h e

r e c o m m e n d a t i o n s

n o v e l

n o

-

a n d

p u b l i c

is

statistics

w h e n

a n d

less a t t e n t i v e

n a t u r e

g a z e

p e r h a p s

a n d

c o n s e n s u s b e s t

h a v e

frigid

a n d

p r o b a b i l i t y

o f

p r o b a b i l i t i e s ,

t e n d e r - m i n d e d

t h e i r p a r t s

l e a v e , it is t h e

a n d

a n d

anti-statistical

h u m a n

m a y

p a r t s

o u r

a v e r a g e s ,

n o

h o w e v e r

Lebensgefuhl

shift

p s y c h o l o g i c a l

w a s

E v e n

rationalizes

E v e l y n ' s

o f

c o i n c i d e n c e s ,

o u r

a r g u m e n t t h a t

o u r

o f

since

ineffable.

m u s i n g s like

c e r t a i n t i e s

f o r

f r i e n d

statistical

s o m e t h i n g

y e a r s

E v e l y n ,

d e e p e s t

-

291

reality.

p r o b a b i l i t y :

o f

p r i v a t e

b i t t e r

o f

a close

t h e

O u r

test

t h e

l a n g u a g e

p r o b e s

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o f

o f

chance

t e r m s

s u m

E v e l y n

h u n d r e d

a n d

s t u f f

a

u n i t

in

t h e

i n d i v i d u a l

e v e n

t h o s e

statistics a c c i d e n t

t h e

t h r e e

invisible

closer

a r e

h i m ,

of

w h a t e v e r

t h a n

s u m m a r i z e .

w e ,

I n

a n d

a reality g r e a t e r

d i v i d u a l s

implications

t h e

just

statisn a m e

justice. s h a r e d

e m o t i o n s

t r a n s f o r m

a n d

i n d i v i d u a l s

risks i n t o

a n d

a b o v e

citizens

o f

all a w a r e n e s s a c e r t a i n

k i n d

t h a t

t h e y

are

o f polity.

O f

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292

The

c o u r s e , t o

n e i t h e r

p r o b a b i l i t y

a n d

s o l u t i o n

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p o l i c y a

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regularities. s u r p r i s e u p o n

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c a b i n e t

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n o

spin

o f

o f

u p o n

c u r i o s i t i e s . Pace

e n e m y

c a t i o n

s a m e

a frisson

o f

w o n d e r .

s u r p r i s e ,

h e r

w h e e l

statistics is o n e

h a s

n o n e t h e l e s s

c a n

m a k e

o f

b e e n

a

T h e

o f

statistician's

u s w i t h

n u m b e r

b e o f

fact

l e t t e r s

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t h e

w a s

w o r l d

u p s i d e

d o m e s t i c a t i o n full

t h a t

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s a l a m a n d e r t h e

d o w n .

T h e

c o n t i n u e

t h e t o

b e

o n l y

p a r -

statistics Q u e t e l e t ,

e a c h

year,

in

a n

as

n o t h a t

Italian Lebensgefuhl

p e r s o n i f i -

u n p r e d i c t a b l e

s t o r y

u n p r e d i c t a b l e a n d

a n d

v e r y

e a c h

is

m a c r o s c o p i c

statistical t h e

g o v -

o d d

just as i n t e n s e

w o n d e r ;

w o n d e r s ,

will

a n d

o n e

t o g e t h e r

E v e l y n ' s

astray

t r a d i t i o n a l l y

c o m p a n i o n

life

o f

s i n g u l a r i t y ;

w e n t

p e t r i f i e d

G r a d g r i n d ,

m a t t e r

L a p l a c e

v i e w i n g

a

-

r e l a t i o n

r e p r e s e n t

a

a v e r a g e s

R e a d e r s

o f

it o u r

u n s u s p e c t e d

regularity.

D i c k e n s '

is

p r i c e

k i n d

n e c e s s a r y

statistics

a s t o n i s h m e n t

s t o r y

c e r t a i n t y

a n d

a n y

o f p l e a s a n t

b o o n

t h e

b e a r

m a y h e m ,

o n e

F o r t u n a

t u r n i n g

a n d

w i t h

t h a t

w i t h o u t

t h e

s u r p r i s e

t h e

p r o b a b i l i t y

f o r e g o -

chance

e m o t i o n

r e s e a r c h .

u n s u s p e c t e d

E v e l y n

is

t o

k i n d

P a r t i c u l a r s

u s w i t h

b u t

scientific

a n o t h e r

l e a r n i n g

d o u b t

o r

of

civic

d i f f e r e n c e s

w i l l i n g n e s s

for

n o r

statistics,

s e t t l i n g

s o m e t i m e s ticulars

c i t i z e n s h i p

implications

o f

p r o b a b i l i t y

F o r t u n a .

B u t

p r e d i c t i o n

it w e

so.

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