Allen, Association in tJic Guinea Pig. 327 



On July 2~ , (:i}, da)'s later, the same test was repeated with 

 .the same animal. Time required, .33 min. Conditions were 

 the same as before. The apparatus was freshly washed, and 

 smoked paper used to show the movements. The only differ- 

 ence was that the guinea pig was taken at the usual feeding 

 time, and it had not been handled for two months. 



July 27 Time, .t^t^ min. 



July 28 1.33 min. 



July 30 .2 min. 



July 31 .415 min. 



Aug. 3 .166 min. 



At this tmie this and several other of the experiments were 

 repeated on other individuals, and the memory in every case 

 was almost perfect. 



Conclusions from the labyrinth experunent. 



I. The guinea pig can learn a complex path to food. 



II. The time curve for learning is very abrupt for the 

 adult, and for any one individual is also irregular. It tends, 

 however, to reach a minimum at which point it is, after a few 

 trials, nearly constant. In the labyrinth used this minimum 

 will be observed to be .166 min. 



III. The curve for elimination of random movements fol- 

 lows very closely the time curve, as random movements neces- 

 sarily increase the time required. 



IV. There are two kinds of random movements: (i) 

 Those made in attempt to reach the food, as biting the wire, 

 running into blind alleys ; (2) those of superfluous activity or 

 curiosity, as exploring the cage, running about, and jumping. 

 When the guinea pig seemed in too playful a mood to attend 

 to business, it was a sign that it was not hungry, and therefore 

 conditions were not uniform. 



Test IX. Learning without the aid of vision. 



Granted that the guinea pig can learn a complex path, the 

 problem arose, What sense elements contribute to this result ? 

 What does the guinea pig remember ? 



The guinea pig may orient itself by means of vision, by 



