41 8 'Journal of Comparative Neurology and Psychology. 



Fourth trial. On the fourth day No. 3 paid no attention to the door or to 

 the button. 



Fifth trial. On the fifth day he worked at the door for a short time. 

 Then he climbed about the cage and ended the period by sitting in the corner 

 near the button. Once he bit at the button. 



Imitation tests. — A'o. 3 imitating JSo. 2. — Both animals were put into the 

 cage together in each of the following tests. 



First test. No. 3 was not attentive to No. 2 at first and was somewhat 

 afraid. He saw four times fairly well. Several times the experimenter pre- 

 vented No. 2 from opening the door because No. 3 was not watching. 



When No. 2 was out No. 3 went to the door and worked vigorously for 

 three minutes. He then went to the button, bit it and pulled as No. 2 had 

 done. He came back to the door at once. Then he returned to the button, 

 bit it, and came back to the door. Later he went to the button a number 

 of times. 



Second test. No. 3 was afraid and avoided the door and button while 

 No. 2 was present. No. 2 was very active and opened the door nuich oftener 

 than No. 3 saw. He saw five times in nineteen. 



Wlien No. 2 was out No. 3 worked at the door intermittently for several 

 minutes, going once to the button and biting it. 



Third test. No. 2 and No. 3 were on good terms and No. 3 kept near No. 

 2 and watched him most of the time. No. 2 worked very rapidly, but 

 No. 3 saw him well, five times in ten. 



When No. 2 was out No. 3 worked at the door for a little time, and then 

 went to the button and pulled it back with his teeth. This movement was 

 different from his previous acts at the button, which were mere bites with 

 no effort to pull. He looked out at the opening behind the button and then 

 went to the door and got food. Time : two minutes after the removal of 

 No. 2. He repeated the entire performance within one minute and six times 

 more within ten minutes. 



TABLE 28. 

 No. 3 Imitating No. 2. 



SiiDnnanj of Behavior of No. 3 in the Button Experiment. 

 At first No. 3 manifested an interest in the door and in the button, but 

 this interest waned as the preliminary trials were continued, and seemed 



