WHITE RATS WHICH COULD NOT LEARN THE MAZE 



301 



in which it was headed until it brought up again against some 

 obstruction. 



Of the five rats which were left alive, two eventually learned 

 the maze; the other three did not. Following is the time and 

 error record, as far as it was kept, for the first 120 trials out of 

 the total, 182. During a part of the experiments, the error 

 record of the three rats which could do nothing with the maze 

 was not kept as they often went up above 200 errors. The 

 trials are averaged by io's to save space. 



Trials 



1-10 

 11-20 

 21-30 

 31-40 

 41-50 

 51-60 

 61-70 

 71-80 



Rats which did not 

 learn maze 



Time 



14.60 

 6.26 

 9.90 

 5.85 

 4.26 

 1.79 

 2.88 

 4.00 



Errors 



88.46 



13.79 

 25.28 

 25.75 



Rats which did 

 learn maze 



Time 



6.59 

 2.60 

 1.39 

 2.35 

 1.68 



.81 

 1.33 



.95 



Errors 



38.95 

 10.10 



3.70 

 11.95 



6.15 

 .90 



3.20 



1.70 



Up to this point in the experiment, the maze had been cov- 

 ered with a glass top, but here a wire screen was substituted 

 for it. The records of the rats which did not learn the maze 

 is continued below. 



The record continues until the 182nd trial. It is not given 

 below, because the rats never came any closer to learning the 

 maze than the above record shows. 



There were certain peculiarities in the behavior of the rats 

 throughout the experiment. They were all very slow in their 

 movements while in the maze. The fastest time that any one 

 rat made was 15 seconds. And that record was made by only 



