110 JOSEPH IT. YARBROUGH 



The raccoon's records include delays from one second through 

 twenty seconds; those for the dog, from one second through 

 seven seconds; those for rat No. 9, from the third stage of delay 

 (turning light off just as the animal was released) through seven 

 seconds; those for rat No. 2, from the third stage of the delay 

 through one second ; and those for Jim and Bess, from one second 

 through four seconds. The data are compiled here for compara- 

 tive purposes and will be easily interpreted without further 

 comment. 



Available data at the time of the preparation of Hunter's 

 paper on the delayed reaction in a child made it clear that there 

 were no marked differences between animals in the reaction 

 tendencies displayed under the experimental conditions in ques- 

 tion. It did look, however, as though there were marked dif- 

 ferences between the animals and the child. Our data here 

 presented place the cats in a class with the child. So far then 

 as this type of test is concerned, no essential differences between 

 man and other animals have been brought to light. 



CONCLUSIONS 



1. All the cats herein tested learned the initial association 

 within from 100 to 180 trials and therefore fall into a class with 

 Hunter's raccoons, so far as rapidity of learning is concerned. 



2. No differences of method in solution of delays was observed 

 between cats on light and those on sound. 



3. The minimum and maximum delays were two seconds and 

 four seconds on the three compartment experiments; while with 

 only two compartments, they increased to sixteen seconds and 

 eighteen seconds respectively. 



4. The cats solved the problem by maintaining gross motor 

 attitudes of the whole or part of the body. 



