8 



WALTER S. HUNTER 



Six untrained rats, nos. 102, 103, 104, 105, 106, 107, two months 

 old, were trained on the space maze of figure 3. One trial per 

 day was given (equivalent to ten trials in the T-box). The cri- 

 terion of learning was a perfect run on each of three successive 

 days, a very much higher criterion than was used with the dis- 

 crimination box. Table 2 indicates the number of days used by 

 each rat prior to the perfect runs. The table indicates that the 

 rats acquired the association very readily. There was nothing 

 in their learning curves to mark this maze as peculiar. 



TABLE 2 

 Number of trials prior to three perfect runs in the spatial maze 



TABLES 



Number of trials in temporal maze 



The six rats trained on the spatial maze were now transferred 

 to the temporal maze using the method described above. One 

 trial per day was given. Table 3 indicates the total number of 

 trials given each rat. At the close of these periods, no rat had 

 mastered the problem. All had fallen into position habits which 

 made the continuation of the test useless. During the progress 

 of the training improvements took place in the following particu- 

 lars: (1) the tendency to retrace or run through the maze in the 

 reverse direction was practically eliminated; (2) the tune was 



