DELAYED REACTION 37 



Appendix A contains tables that show all the regular tests 

 given to the raccoons Bob and Jill and to rats 4 and 16. The 

 data are there given in the order in which they were obtained. 

 They are typical of the results of all the animals. 



There is so much individual variation within the three groups 



of animals whose results have just been given that any exact 



correlation between length of delay and groups of animals is 



unwise. It is to be borne in mind moreover that it is not the 



length of delay but the methods of reaction after delay to which 



the greater importance attaches. This topic will be discussed 



later. To give some further idea, however, as to the relation 



between the groups Table V gives the longest and the shortest 



delay made by each class of animals. This table ignores the 



different conditions under which the delays were obtained. It 



presents the maxima and minima of the best reactions that the 



individual animals of a group were able to make under the 



present conditions. 



TABLE V 



Subjects Min. delay . Max. delay 



Rats Either no learning or 3rd stage 10 sees. 



Dogs 2 sees. 5 mins. 



Raecoons 3 sees. 25 sees. 



(b) Effect of size of release upon interval of delay. — The 

 experiments so far described were all made with the small 

 release described in the section on apparatus. This release con- 

 fined the animal's activities to a small part of the apparatus. 

 It was thought if a release was used which would give the 

 animal the freedom of the whole interior of the box, that not 

 only might the maximal interval of delay be increased, but the 

 animal might reveal more clearly its method of solving the 

 problem, — indeed it might even develop a new and higher 

 type of behavior in response to the more complex situation. 

 These latter possibilities, we shall consider below. 



The new release that was used fitted just inside the openings 

 into the light boxes. It was made of a continuous piece of wire 

 netting, thus making possible the simultaneous presentation of 

 all three boxes. It was now possible for the animal to go over 

 to the door of the lighted box and wait there during the interval 

 of delay. The light was always left on until the animal had 

 reached a position immediately in front of the lighted box. 



