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 
Tt T 7 T T T T 
-— & oe ee Sy am 
a3 § € 8 $< ss ss FS sRERESS 
« | 7160 
Si 
s | 30 
Bg 
S$ | 90 
« 
mT 60 
s 
oe OQe——q— 
ae Be 
ag 
= T 28 
a 
20 
© 
30 
is) 
22 
~ 
Sl 77 
=| 
15 
“T- 20 
eT 72 
*I70 
a 
ve €% G le OF 6L St LL OL 
5] | al = 3] al eal a sl 2 
Fig. 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, 
