476 'Journal of Comparative Neurology and Psychology. 



set III both the weak and the strong stimuH were less favorable 

 to the acquirement of the habit than the intermediate stimulus of 

 195 units. It should be noted that our three sets of experiments 

 indicate that the greater the brightness difference of the electric 

 boxes the stronger the stimulus which is most favorable to habit- 

 formation (within limits which have not been determined). Fur- 

 ther discussion of the results and attempts to interpret them may 

 be postponed until certain interesting general features of the 

 work have been mentioned. 



The behavior of the dancers varied with the strength of the stim- 

 ulus to which they were subjected. They chose no less quickly 

 in the case of the strong stimuli than in the case of the weak, but 

 they were less careful in the former case and chose with less delib- 



