400 'Journal of Comparative Neurology and Psychology. 



Here again, we note attention on the part of the observing animal 

 and a subsequent marked change of behavior (somewhat sudden) 

 in the direction of the behavior observed in the performing animal. 



TABLE 18. 

 Results of the Paper Experiment. 



I. 



Number of animals used in imitation tests 3 



Cases of successful imitation 2 



Cases of partially successful imitation 1 



Cases of failure to imitate 



II. 

 Cases of imitation wlien the imitator was confined during the activity of 



the imitatee 1 



Cases of imitation when the two animals were in the cage together 2 



III. 



Cases of immediate imitation 



Cases of gradual imitation 3 



IV. 



Cases of imitation in which the imitating animal did not himself experi- 

 ence the result of the act before performing it 1 



Cases in which the imitating animal did experience the result of the act 

 before performing it 2 



5. Screen Experiment. 



A. Description of Device. 



The device in this experiment was a modification of tlie one used in the 

 Paper Experiment. The paper was not used. The string which lifted the 

 screen (fig. 7, a) was removed. 



The act which the animal had to perform was to push the screen up with 

 one hand and with the other reach through the hole and get food. No animal 

 was tried in this experiment which had not previously gotten food in the 

 Paper Experiment. 



B. Behavior of 'So. J/. 



No. 4 first pushed the screen up when the paper was being adjusted in the 



Paper Experiment. She did not, however, tear the paper. The screen 



dropped back in place and she lifted it again. Tlie fourth time she pushed 



the screen up, it stuck and did not drop back. She then tore the paper. 



