TRANSFER OF RESPONSE IN THE WHITE RAT 



63 



It again stands out clearly that it is an advantage in 

 learning one sort of stimuli to have first learned the same 

 response to another sort of stimuli, and that a few simul- 

 taneous series will render the transfer effect sufficiently 

 perfect for the animal to meet at once the standard of 

 learning set up at the beginning. A glance at the tables 

 will show, however, that a gradually increasing number of 

 simultaneous series does not bring a gradually increasing 

 advantage. Attention to this fact has been called in pre- 

 vious series of experiments. In the present case two simul- 

 taneous series proved more advantageous than four simulta- 

 neous series. Whether a larger number of animals would 

 give an average which would eliminate this discrepancy and 

 the ones previously reported is yet to be tested. Theoreti- 

 cally, one might expect them to be eliminated. 



In order to get before us all the tabular results bearing 

 on the problem of transfer, we have gathered them together 

 and expressed the results, not only in the number of trials 

 gained, but also in the percentage of gain. This will enable 

 the reader to get at the amount and the conditions of 

 transfer most quickl3^ 



Light to Sound 



Trials 

 Normal sound record . . . 525 . 5 



Gained by direct 373 88 . 7% 



Gained by two simul.. . . 375 89. 1% 

 Gained by four simul. . . 420.5 100' t 



Sound to Light 



Trials 



Normal light record 198 . 87 



Gained by direct 48 . 87 52% 



Gained by two simul. . . . 78 . 87 84% 

 Gained by four simul. . . 93.87 100% 



Light to Pain 



Trials 



Normal pain record 191 . 13 



Gained by direct 33.63 39 % 



Gained by two simul — 35 . 13 40 . 7% 

 Gained by four simul. . . 86. 13 100%o 



Sound to Pain 



Trials 



Normal pain record 191 . 13 



Gained by direct 66.83 77.5% 



Gained by two simul 50 . 13 58 . 2% 



Gained by four simul. . . 86. 13 100% 



Pain to Light 



Trials 



Normal light record 198 .87 



Gained by direct 52 . 62 56' 



Gained by two simul. ... 93 . 87 100' 



Pain to Sound 



Trials 



Normal sound record . 



Gained by direct 



Gained by two simul.. 

 Gained by four simul. 

 Gained by six simul.. . 

 Gained by eight simul 



525 5 



213' 50.6% 

 345.5 82.1% 

 315.5 75 % 

 405.5 96.4% 

 420.5 100% 



