INDIVIDUAL DIFFEEENCES 41 



order, from right to left, or left to right, but going through the un- 

 locked door as soon as it was reached. 



Type 3. Kesponding by trying the gates once each, in an irregu- 

 lar manner, and finally going through the right gate apparently by 

 chance. 



It was noted that the majority of the animals that were observed 

 in this investigation used types 2 and 3 interchangeably. A few 

 animals used type 1 for several days in succession and appeared to 

 actually discriminate before they made their final choice of the gates. 

 This type 1 reaction was noted by Burtt in his experiments entitled, 

 "A Study of the Behavior of the White Rat by the Multiple Choice 

 Method." 15 In the case of one rat he says: ''In problem 1 she would 

 at times become oriented very suddenly, dash to the right end and 

 then across to the correct door. ' ' Types 2 and 3 of this investigation 

 correspond to the B and C types found by Hamilton in the study of 

 primates and rodents. 2 



is Harold C. Burrt, "A Study of the Behavior of the White Eat by the Mul- 

 tiple Choice Method," Journal of Animal Behavior, May, 1916, Vol. 6, No. 3. 



