TRAINING IN WHITE RATS UPON VARIOUS SERIES OF MAZES 53 



tion concerning the error-records, although in this case 

 there are two exceptions. In the record of the group whose 

 learning of the D maze was interrupted after the sixteenth 

 trial, the negative transfer in errors in the part of the 

 learning succeeding the interruption is to be ascribed to 

 the same cause which produced the negative transfer in 

 trials. In the part of the learning of the E maze that 

 followed the interruption after the sixteenth trial, there 

 was a small negative transfer in trials, but the causes 

 producing it did not suffice to produce negative transfer 

 in errors, although they did bring about the closest ap- 

 proach between the average errors of the trial and control- 

 groups for any of the interrupted learnings in the E maze. 

 As a part of the present inquiry, the average error and 

 time-records of the trial-group for the first three trials 

 after its return to the maze already partially learned 

 were compared with the records of the control-group for 

 the corresponding trials. For example, the records for 

 these first three trials after the resumption of learning 

 by the group whose learning of the maze had been inter- 

 rupted after the second trial were compared with the 

 records of the control-group for the third, fourth and 

 fifth trials upon the same maze. The figures setting forth 

 this comparison are presented in table 45. 



TABLE 45 



The Average Errors and the Average Time per Trial for the First Three 



Trials after the Return to the Maze Already Partially Learned, 



Compared with the Corresponding Records of the Control-Group 



Maze D Maze E 



Trial -Group Control-Group Trial -Group Control-Group 



(Two Trials in Partial Learning) 



3.29 67 2.30 



1.30 34 1.01 



(Four Trials in Partial Learning) 



2.52 81 2.00 



.89 30 .39 



(Eight Trials in Partial Learning) 



2.00 41 1.57 



.50 28 .37 



(Sixteen Trials in Partial Learning) 



.86 50 1.10 



.52 23 .29 



