Haggerty, Imitation in Monkeys. 421 



Wlieu No. 2 was out No. worked vigorously at the door aud then went to 

 the button and pulled at the screw eye and the knob, but not hi such a way 

 as to open it. Three times she went 10 the button and back to the door. 



Second test. No. 5 saw No. 2 push the button five times in thirteen, but 

 did not follow him to the food door. 



After No. 2 had been taken out No. 5 became quite eager about the door for 

 a minute. She went to the button, but made no effort to move it. 



Third test. No. 4 was used instead of No. 2. No. 5 saw No. 4 five times 

 in fifteen. She did not follow her about, but kept out of her way. 



Wlien No. 4 Avas removed No. 5 worked a little while at the door aud then 

 played about the cage for ten minutes. 



Fourth test. No. 5 was afraid of No. 4 and kept away from her, owing 

 to the punishment No. 4 had given her. She kept close watch on No. 4, 

 however, and saw her move the button back and get food. This she saw 

 ten times in nineteen. 



With No. 4 out No. 5 looked through the door at the food, but did not woi'k 

 vigorously. She took her leisure about the cage for ten minutes. 



Fifth test. No. 2 was again used. No. 2 pushed the button and No. 5 

 followed and pushed it, and coming to the door got food. No. 5 retreated to 

 the front of the cage and kept her eyes on No. 2. Each time when No. 2 pushed 

 the button No. 5 came to the door for food. She thus prevented him from 

 getting any, for he was afraid of her. Once (fifth trial) she got food, and 

 immediately went to the button and pushed it back. 



No. 5 became much more attentive to No. 2 than at any time previously 

 and lier eyes flaslied from the door to No. 2 and from No. 2 to the door, and 

 always when he pushed the button she came to the door. After seeing him 

 three times more she went to the button again, pushed it back and went 

 directly to the door for food. This she repeated three times, the first two 

 times coming directly to the door, and the third stopping for a moment to 

 examine the opening beliind the button. This she repeated once and then 

 performed the entire act six times, not stopping to make any examination 

 of the button. 



Sin)ij)i(i)!i of Behavior of No. 5 in the Button Exiieriment. 

 Despite her unusual aud persistent activity No. 5 did not once push the 

 button during her preliminary trials. Yet she did push it at once after 

 seeing No. 2 do it. Tliree times she repeated this, but not once did she go to 

 the food door after doing so. What she had learned seemed to avail her 

 nothing until the fifth test. She then followed No. 2 through his entire act 

 of pushing the button and coming to the door to get food. She maintained 

 a heightened interest in No. 2 during the whole of his ten performances, and 

 by the end of the time was able to get food for herself as she had seen him do 

 it. It should be noted that after pushing the button back and securing no 

 result she ceased to push it during the second, third and fourth tests. Where 

 this conduct reappeared it was connected with the getting of the food. 



