RUTLEDGE T. WILTBANK 



i.e., along the true pathway toward the food-box. These 

 are the only errors which become fixed, and the actual 

 task of the rat, stated in negative terms, is to overcome 

 the tendencies to enter blind alleys while moving in the 

 forward direction. The time was taken with a stop-watch, 

 and was reckoned from the moment when the rat was 

 introduced into the maze until it reached the food-box. 



The groups contained the following numbers of rats 

 and proportions of males and females: 



Group 1 

 Group 2 

 Group 3 

 Group 4 

 Group 5 



8 rats — 4 males, 4 females 

 10 rats — 5 males, 5 females 

 10 rats— 6 males, 4 females 



9 rats- — 5 males, 4 females 

 10 rats — 6 males, 4 females 



