i8 JOSEPH U. Y ARE ROUGH 



animal was changed from a group where the stimuli were pre- 

 sented in the backward to a group where they were presented in 

 the forward direction or vice versa. The situation really re- 

 mained the same with the exception of the changed stimuli i.e., 

 the substitution of the response is now from the auditory stimulus 

 to light instead of from pain to sound as before. The same 

 time intervals were studied as before. As in the previous 

 experiment, it was necessary to enter the special series of 

 test trials only in the study of the first interval to determine the 

 extent to which the transfer had been made at any given time. 

 The same standard is required here as in other problems. 



