TRANSFER OF RESPONSE IN THE WHITE RAT 61 



While two simultaneous pain and light series were given 

 the second group and that number proved sufficient to 

 perfect the transfer effect, yet it is the conviction of the 

 writer from observation of the general behavior of the 

 animals while the simultaneous series were being given that 

 one series of simultaneous stimuli would have been suf- 

 ficient. Since this series of experiments was the last to 

 be performed, time prevented the testing out of that con- 

 viction. 



Another interesting feature not shown in the regular 

 tables and curves was the attempt to discover how many 

 times an animal would turn back when the stimulus was 

 presented, without being allowed to return to the food box 

 after a correct response had been given. If the animal 

 chose the right alley it was confronted with the stimulus. 

 Then when it returned and entered the left alley it was 

 again met by the stimulus. Then upon returning to the 

 right alley, the stimulus was again given. This was con- 

 tinued until the animal disregarded the stimulus or until 

 it refused to work longer. Number 168 turned back three 

 times before disregarding the stimulus. Number 169 

 turned back seventeen times and then refused to work any 

 longer. Number 162 turned back nine times before dis- 

 regarding the stimulus; number 163 five times; number 164 

 eight times, and number 166 thirteen times. These figures 

 indicate that the response had become reflex and also that 

 it was not merely a habit of entering one alley and turning 

 back and returning to the food box through the other. 

 These tests were conducted with both doors to the food 

 box open and some of the returns to the other alley were 

 made when the animal was within sight of the open door 

 to the food box. This test was tried only with the light 

 stimulus and only with those animals which had been 

 transferred from the pain to the light. 



(6) Pain to Sound — Five groups were trained with the 

 pain and transferred to the sound. Group XXII was 

 transferred directly from pain to sound. Group XXIII 

 was given two series of simultaneous pain and sound. 

 Group XXIV was given four series of simultaneous pain 

 and sound. Group XXV was given six series of simul- 

 taneous pain and sound. Group XXVI was given eight 



