61 



It maye be seen from the table that the males are at every 

 age aonev'hat suj-erior to the females in learning ability, their 

 superiority being less marked in the young and old grou^-s (25 

 and 300 days) than in the two intermediate groups (65 and 200 

 days). The general averages for an equal number of males and. 

 females shov; the males Bujerior to the females in all points 

 save one, that of absolute time. They finished in fewer trials, 

 required less total time, and covered a smaller amount of dis- 

 tance in learning the problem than did the females, while their 

 speed was slightly higher. This conclusion is at variance with 

 that of Yerkes regarding the dancer, he having found the females 

 snperior to the males in learning the laoyrinxn. In the matter 

 of final efficiency as evinced by the absolute time, the females 

 are superior to the males at all ages except three hundred days 

 when the tv«o records are practically equal. The general aver- 

 age shows this to be the one point wherein the record for the 

 females is better than that for the males. 



The mean variation from the time average is leas for the 

 males at all ages, their distance variation is less at sixty-five 

 and three hundred days. The general average shows the smallest 

 time variation for the males and the smallest diotance varia- 

 tion for the females. These results do not agree with those of 

 Yerkes on the dancer. His ten month fSOO day) dancers learned 

 the labyrinth more rabidly, the number of trials required being 

 the measure of learxiing, than those one to two months oli (30-60 

 days) while there was no difference in the learning ability of 

 the females at the two ages. My 25 and 6£ day rats of both 



