EVIDENCES OF INSIGHT 41 



pressing his dislike of the procedure he all at once made up his 

 mind that it was inevitable and might better be got over with 

 promptly. Panzee, although disliking the experience, ob- 

 jected less strenuously than Chim, and on the whole gave 

 better opportunity for this particular physical measurement. 

 On the other hand she never showed the sudden change from 

 resistance to acceptance that appeared in Chim. 



These four instances of differences in speed and degree of 

 adaptation to unusual circumstances are selected from 

 many which might be described. They will suffice to suggest 

 at least the order of difference between these two young 

 chimpanzees. 



INSIGHT AND IDEATION 



Both Koehler and the writer have concentrated attention, 

 as research opportunity offered, on the study of ideational 

 behavior in the anthropoids. The writer has presented in 

 another connection (12) evidences of insight in a young orang- 

 utan, while Koehler has presented strikingly similar, 

 although more numerous and varied, evidences of ideational 

 behavior in adolescent chimpanzees (9). This report 

 presents certain evidences for chimpanzees which are much 

 younger than any observed by Koehler. According to his 

 estimates the age of his subjects ranged from six or seven 

 years upward. 



Since the results now to be reported are qualitative merely, 

 it will be unnecessary to describe in detail the situations 

 which were contrived by the experimenter to test or exhibit 

 whatever insight the animals might be capable of. This 

 statement does not imply that the situations were casually 

 arranged, or the observations carelessly made. Instead, 

 every attention was given to essential features of the tests, 



