TRANSFER FACTORS IN MAZE LEARNING 



333 



of groups III and IV and in the mazes of the test series for all 

 four groups. This run was repeated daily for a total of ten trials. 

 Time was not taken for these runs. 



Group III was taught a definite maze problem in reaching the 

 food. The plan used was the PA maze (permanent blind alleys) 

 in figure 2, and the course of learning in this case is given graph- 

 ically for the whole group in figure 3, shown only to include the 



C A.. 



16th trial as different individual rats had learned the problem 

 and had been eliminated from trials later than this. The curve 

 drawn is seen to be of the usual type. Only one of the five rats 

 had not learned the problem (three errorless trials in succession) 

 by the twenty-fifth or last trial, and it had run without error on 

 the twenty-first and twenty-fourth trials. In order to keep the 

 group more or less together this rat was treated as having learned. 

 Group IV was given the rather unusual task of running twenty- 

 five different mazes on twenty-five successive days, one trial per 



