22 



HELEN B. HUBBERT 



FIGURE 3-c Distance Curve for Twenty-five Day Rats. 



The apex of the distance curve, (Fig. 3-C), is at three hundred 

 thousand centimeters, which is not far from the group average 

 of two hundred seventy thousand. 



No very close relation seems to obtain between the number 

 of trials required for finishing the problem and the total amount 

 of time or distance. Thus, the rat which finished in fourteen 

 trials had the highest total time record in the group, and a high 

 distance record, while the rat which finished in fifty-one trials 

 had the highest distance record, but a mean time record. The 

 lowest time record was made by a rat finishing in twenty-four 

 trials whose distance record was also low; the lowest distance 

 record, by a rat requiring eighteen trials for the problem, whose 

 time was lower than the average. Except where the time 

 values are very high, time and distance bear a fairly constant 



