372 



STELLA B. VINCENT 



versed and two where they were the same. The number might 

 have been easily doubled but it seemed useless to do so. 



TABLE III 

 Distribution of Errors, Normal Maze 



TABLE IV 

 Distribution of Errors, Black-white Maze 



Total errors 



Trial at which the error 

 was not made three 

 times in succession by 

 any rat 



Average errors per rat 

 after the 10th trial 



Average errors per rat 

 from 20th to 35th trial. 



Alley Alley 

 1 2 



31 55 



16 



.6 

 .2 



19 

 1.7 



.6 



Alley 

 3 



45 



7.5 

 .8 

 .3 



Alley 

 4 



43 



.6 

 .5 



Alley 

 5 



11 



4.5 



.1 



i 



Alley 

 6 



24 



6 

 .1 

 .05 



Alley Alleys Allevs 

 7 ' 1, 2, 3 5, 6, 7 



131 



2.5 14.2 

 .1 1. 

 .15 .36 



40 



4.3 



.11 

 .1 



TABLE V 

 Distribution of Errors, Olfactory Maze, Trail in True Path 



