Allen, Association in the Gui)ica Pig. 321 



The reactions took place almost mechanically. The box 

 seemed to be the thing-to-be-run-into. It was always in the 

 same position. In this way, whether the door was open or 

 closed seemed to make no difference ; it was pushed open 

 rapidly when the position of the entrance became an habitual 

 one, and the reaction was not perceptibly lengthened. 



F"rom the preliminary test it was concluded that the guinea 

 pig would react to a stimulus under laboratory conditions. The 

 elements entering into the situation were (a) the sight and odor 

 of food ; (b) the sight of the box, and association of the gen- 

 eral environment with food ; (c) the association of a certain 

 series of kinesthetic sensations with the satisfaction of hunger. 



Test VII. Distinction of stimuli. 



An attempt was made to determine what the stimulus was 

 which induced the reaction to the problem. 



The food was covered with a glass dish, and care was taken 

 to eliminate all possible odor from the box. There seemed to 

 be no shyness of the glass dish as it was treated with indiffer- 

 ence when left in the cage. Nevertheless, the possibility that 

 fear might not have been observed though present, must be 

 borne in mind. 



Jan. 31. Time. 



1. .5 min. 



2. .75 min. 



3. .083 min. 



4. .083 min. 



The first time I did not give any food when the guinea pig 

 got into the box. The effect of this disappointment is seen in 

 the second reaction ; at that time I gave food, then removed it 

 quickly. The same was done in the third reaction. 



At this point in the experiment it seems certain that a 

 smell stimulus is not necessary to produce the reaction after the 

 situation has been learned. 



In order to determine if possible what stimulus is the 

 strongest a choice experiment was introduced. 



A dish was arranged in a wire box with the carrot in plain 

 sight but covered with glass. Into another and similar wire 



[29] 



