40 



K. S. LASHLEY AND L. E. WILEY 



the table into percentages of the scores of group I and aver- 

 aging these, we obtain the following figures: group I, 100; 

 group II, 89.9 ; group III, 72.9 ; group IV, 77.1 per cent. These 

 figures indicate that the animals previously trained on the 



TABLE 19 



Constants for normal and operated animals on maze V: to test the equality of 



the groups previously trained on mazes I to IV 



ERRORS LESS 

 FIRST RUN 



TRIALS LES 



CORRECT 



RUN- 



TIME LESS 

 FIRST TRIAL 

 (SECONDS) 



Normals 



Operated 



I 



IT 



III 



IV 



50.9 ± 4.0 

 48.7 ± 3.9 

 44.7 ± 4.2 

 44.4 ± 4.3 



32.6 

 32.4 

 33.2 

 36.8 



3263 ± 609 

 3177 ± 680 

 1857 ± 244 

 2244 ± 447 



4948 

 5610 

 1983 

 3865 



TABLE 20 



Beliability of the differences for error scores among the normal and among the 



operated groups in maze V 



mazes with few culs de sac learned maze V less rapidly than 

 did those previously trained on mazes III and IV. The relia- 

 bility of the differences between the constants in table 19 is 

 not great. Table 20 gives the ratios of the greatest differ- 

 ences between the error scores to their probable errors. Al- 



