348 



J. F. DASHIELL 



cant. Does this less amount of time and errors for group II 

 on the first run measure the effect of adjustment to maze materials 

 as a transfer factor? (Supra, p. 337.) The difference between 

 the records in Q of groups III and IV seemed negligible in the 

 first series of experiments; but in figure 10 we see them clearly 

 shown in the initial attack, a comparison of later runs being 

 inconclusive. Finally, the difference between groups I and II 

 taken together and groups III and IV taken together is again 

 found to hold; suggesting, as was stated above, that the mere 

 presence of blind alleys in the environment of the rat has signifi- 



to- 



9- 

 <3- 

 7- 

 6- 

 sr- 



-e- 



I I I I 



i 



cance and familiarity with such is transferable. Finally, the 

 records for the four groups differ significantly only in the earlier 

 readings, showing that the transfer effects from practice in pre- 

 vious mazes affects principally the first few trials in a new maze. 

 Thus, the second series of experiments serve not only to corro- 

 borate the results of the first series in the matter of differences 

 between groups I and II and groups III and IV, but also to ren- 

 der more definite the differences between group I and group II 

 and again between group III and group IV. 



The incidental runs of group IV in the series of mazes CA 

 . . . again are interesting. It will be recalled that the con- 



