128 



FLETCHER, COWAN AND ARLITT 



Maze No. 3 



Maze 3 consisted of a series of short, straight alleys arranged 

 in the following pattern: 



a 



a was the point at which the chick was placed in the maze. 



b was the open exit where the chick emerged at the edge of the table holding the 



maze and ran down a short incline into the chick pen ten inches below the 



table edge. 



The chicks used with this maze were those of the fifth hatch- 

 ing. Each chick was given thirty successive trials without 

 interval. The problem appeared to be as difficult as it could 

 be and still be solved by the normal chicks. But even here 

 the hole, water and alcohol chicks were at a disadvantage only 

 during the earlier trials. Their records for the last ten trials 

 are as good as those of the normal chicks. 



Certain of the chicks of this hatching made little or no im- 

 provement in the course of the tests with Maze 2. These were 

 chicks 10, 21, 51, 71 and 72. Chick 21 died before the tests 

 with Maze 3 were begun. Of the others the only one which 

 did not make a record which showed the normal rate of im- 

 provement in Maze 3 was chick 10, a normal chick. Chick 43 

 was the only other chick whose behavior was unusual in both 

 mazes. This chick was amazingly sluggish during the early 

 trials in Maze 2. Its record for that maze is entirely normal, 

 however, in its improvement as the trials progressed. This 

 sluggishness was not apparent in Maze 3 but the time, record 

 increases instead of decreasing gradually as the trials progress. 



