32 



RUTLEDGE T. WILTBANK 



In two mazes, A and E, the average total number of 

 errors per rat decreased with the increase in the number 

 of mazes previously learned, and these decreases were not 

 slight ones, proportionately speaking. If the various 

 groups are ranked upon the mazes according to the average 

 total errors made by the rats of the group, it will be found 

 that the average ranking of the groups having had four 

 prior learnings is highest, the average total errors of the 

 rats in these groups taken together being least; and the 

 groups having had three, two and one prior learnings 

 follow in order. This may be seen in table 26. 



TABLE 26 



The Rankings of the Groups upon the Mazes, According to the Average 

 Total Number of Errors per Rat 



Maze A Maze B Maze C Maze D Maze E Av. Rank 

 Group having learned 



jour preceding mazes 

 Group having learned 



three preceding mazes 

 Group having learned 



two preceding mazes 

 Group having learned 



one preceding maze .4 3 4 1 4 3.2 



According to the average total time per rat, there was 

 only one maze in which this time decreased with the in- 

 crease in the number of previous maze learnings by groups 



B 



D 



jS 



2a 



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