STIMULI DURING DELAYED REACTION IN DOGS 279 



The results for condition "C" were better than those of either 

 condition "A" or " B," as a much better practical mastery of 

 each type was shown 



The results on "Sixty Seconds Delay" were but little better 

 than chance, because of an aversion to No. 3 compartment, 

 due primarily to a too brilliant light. When this was replaced 

 by a dimmer light on shorter delay trials No. 3 compartment 

 was chosen as well as No. 1. 



The success of these series of trials led the experimenters to 

 attempt various types of diversion during the delay period, 

 first in condition "A" and then in "C." These experiments 

 were recorded under the heads of condition "AD" and "CD" 

 respectively. 



Condition "AD " 



In condition "AD," meat was held in sight of the dog during 

 the delay and the experimenters talked and whistled to him 

 in order to keep his attention away from the problem before 

 him. For the first five of the seventeen trials given, the dog 

 did not do very well, and seemed to have lost his cues, but soon 

 regained them and the diversion seemed to have no effect on 

 correctness of reactions, for the last nine reactions were all 

 correctly and unhesitatingly made. 



The exact record will show the effects, the best of any way. 



Stimulus at Compartment 13111133331313313 17 Trials 

 Reaction at Compartment 13333130331313313 4 Errors 

 Correct xx xx xxxxxxxxx 13 Correct 



Condition " CD." 



In this condition diverting stimuli were given during the 

 delay period of condition " C." These stimuli consisted (1) 



