

STUDIES OF CEREBRAL FUNCTION. IX 



41 



lowing for the differential transfer indicated above, these 

 differences will be still further reduced. Groups III and IV 

 tend to be somewhat better than groups I and II in both the 

 normal and operated series, so the inequalities may be ex- 

 pected to influence the results for both series in the same 

 direction. Although absolutely large, the differences with 

 maze V are relatively small in comparison with those obtain- 

 ing between the records of the groups in the comparison 



TABLE 21 



Average learning records of normal animals on the four mazes used for test of 



the influence of complexity 



mazes. They seem unlikely to have produced a constant error 

 in relation to the complexity of the mazes. They do restrict 

 us to a consideration only of large differences as evidence of 

 any genuine influence of the complexity of the problems upon 

 rate of learning. 



Comparison of normal and operated animals in learnvm 

 mazes of different complexities 



Tables 21 and 22 summarize the learning scores for normal 

 and operated animals in mazes I to IV. For error scores 

 there is a regular progression in practice required for learn- 



