36 



HELEN B. HUBBERT 



Others. The lowest time record as well as the lowest distance 

 record was made by a rat which finished in sixteen trials, the 

 highest time record by one requiring twenty-four trials, whosQ 

 distance record was an average one. The highest distance record 

 belongs to the rat with next to the highest number of trials 

 whose time is also next to the greatest. 

 Group averages were: 



41 



Time 



Trials Absolute 



11.6 sec. 



Total 



743 min. 



Distance 



Speed 



367.5 m. 8.2 cm. per sec. 



Figure 6-a Trial Curve for Three Hundred Day Rats 



The apex of the time curve (Fig. 6-A) lies at twenty-eight, 

 although the average is forty-one. The large number of rats 

 finishing after thirty trials however easily accounts for the 

 apparent discrepancy. Two maxima are found in the time 

 curve, (Fig. 6-B), at seventeen hundred and twenty-eight hun- 

 dred respectively, but again the general average is raised by the 

 twelve animals who required more than three thousand seconds 

 in which to learn the maze pathway. There is a decided apex 

 in the distance curve (Fig. 6-C) at thirty-three thousand, which 

 nearly corresponds with the group average of thirty-six thousand. 



