THE DELAYED REACTION IN CATS 99 



* TABLE IN— Continued 



Cat 



Jim. 



1 28 3 



Six seconds delay. — Bobby was the only cat either on light 

 or sound that was tested on the six seconds delay before the 

 middle box was taken out. Although she had made 85% on 

 her last 40 trials on the four seconds delay, she fell to 50% on 

 the first 10 trials in the six seconds delay. After 90 trials with 

 only 50% of the last 40 correct, she was put back on the four 

 seconds delay where she was given 70 trials, making 80% on 

 the last 50. She was again given 20 trials on the six seconds 

 delay with 55% correct. After 60 more trials on the four seconds 

 delay with 85% correct, she was given 20 trials on the six seconds 

 delay with 70% correct. The records show that during the six 

 seconds delay she became restless and often turned around in 

 the release box. In such cases she usually went to boxes a or c, 

 depending upon the one she came in line with first in making a 

 circle by her turning in the release box. It is the writer's opinion 

 that with further training cats can bridge the six seconds delay 

 with three boxes. 



(b) Set B (cats tested on sound). — 



Delay I. — The two cats that continued the work on sound 

 after the death of their fellows were Bess and Phil. Bess was 

 given 60 trials, 48 of which were correct. Of the last 30 trials, 

 26 or 86% were correct. Phil received 30 trials with 25 or 83% 

 correct, and 9 of the last 10 correct. As in the case of the light 

 experiments, no difficulty was encountered by cutting off the 

 stimulus at this point in the reaction. 



Delay II. — One hundred trials were given Bess, and she made 

 80% correct reactions. Phil received 50 trials which contained 

 90% corre ct. Of the last 20 trials 19 were correct. Although 



* Middle box was dropped out here. 



