324 Journal of Cojiiparativc Neurology and Psychology. 



Feb. 12. The animal explores the cage, but is perfectly passive most of the 

 time. Found the food in i hr. 55 min. 



In this problem there was choice of two directions to be 

 taken to the entrance. The guinea pig was always put down 

 in a fixed spot, namely at }". It could go to the right or left. As 

 a matter of fact, some individuals learned one way and some the 

 other, and the direction taken was not always the same with the 

 same individual. As a rule, when the problem had been learned 

 the blind alleys were omitted. Attempts to gnaw through the 

 wires at various points were abandoned after the first few times, 

 when another method had proved more successful. 



The six guinea pigs which learned this problem, three of 

 which were used at the same time as the example given, were 

 remarkably uniform in their results. There was no sufficiently 

 important variation to deserve remark. The variations which 

 did occur were to be accounted for by difference in tameness, 

 or by some chance noise producing fear and thus requiring 

 time for recovery. Two curves of the time required are here 

 given. (Text-fig. 7.) The time in minutes is indicated on the 

 ordinate, while the divisions of the abscissa represents the num- 

 bers of the trials. 



[32] 



