184 



J. F. DASHIELL 



Fifty white rats were used as subjects, five being run in each 

 maze for one trial only. The conditions of the problem forbade 

 the use hi any trial of a rat that had had any acquaintance with 

 a maze before. The pattern of each maze was reproduced on 

 paper and a pencil line was used to record accurately the partic- 

 ular directions and turns in the rats' trials. The graphic records 



7 



C71 U 



L_- L'l U 



p ir 



t 1 A f 1 B 



G 



were then analyzed, by inspecting them and tabulating for 

 each maze and rat the number of times F, R, and L each was 

 passed or was entered, and in the latter cases the number of 

 exits from the blind alley that turned backward (i.e., retracing 

 pathway toward entrance) and the number of exits turning for- 

 ward (following along the newer path toward the exit from the 



