DISTRIBUTION AND ELIMINATION OF ERRORS IN MAZE 159 



The amount of returning will vary with the animal, the maze, 

 the stage of mastery, and the section of the maze. 



The character of the motives will shift within a run as prog- 

 ress is made from section to section, and from one stage of 

 mastery to another. 



The attractiveness of cul de sacs due to peculiarities of con- 

 struction or position must in part be interpreted in terms of 

 the animal's organization in reference to them. As a possible 

 hypothesis, it is suggested that these disposing conditions of the 

 organism are a function of the maze habit as developed up to 

 that time. With this conception the individuals of a group 

 may vary in their attitude toward a cul de sac and the attitude 

 of any individual may change as the maze is being mastered. 



