150 INTELLIGENT BEHAVIOUR 
pleasure, until, after many trials, the cat will, when put in the box, 
immediately claw the button or loop in a definite way. . . . Starting, 
then, with its store of instinctive impulses, the cat hits upon the 
Scale of Time in Seconds 
= Go at Sa) > N Go © = i as ae mS a ~ 
Gh Shee RSM eS PS 2S, es RS eesti cae SSL icS ae = 
™~ — 
& | 760 
5 
Si ieao 
e 
=. Go — 
S 90 
nS 
A 60 
S 
2 15 
Ps o 
S° Oe ean eh 
ne 
20 
Oo 30 
© 
BD 
x 
>i 
= 
= 
15 
mS 
20 
| j 
yO 
Te 
ae 
S70 
= 
co 8 
s 
S15 
No 
170 
ho 
Deel Ie: 
fo 
NT6 
No 
TG 
No) 
~ 
Fic. 23.—Diagram showing times taken by a kitten to escape from the 
cage in twenty-four successive experiments. 
successful movement, and gradually associates it with the sense- 
impression of the interior of the box until the connection is perfect, 
