TIME VERSUS DISTANCE IX LEARNING 



67 



and at the 81st trial only five were running, while at the 86th 

 trial only four remained. Where only a few animals are running 

 individual differences are sure to alter the curve contour. 



With the exception of the discrepancy shown in the first 

 eight trials and the apparent discrepancy in the final trials, the 

 time and distance curves show great similarity in contour. 



Table 2 shows the effect of throwing out both time and distance 

 records in each case of failure on the part of individual animals. 

 It was found that the figures were identical with those of Table 1 , 

 except for the trials indicated. For the sake of comparison the 

 original records (Table 1) for the corresponding trials are 

 repeated. Examination of Curve II, plotted from these figures, 

 shows a somewhat steadier curve and in general a closer ap- 

 proximation between time and distance. The same explanation 



V\A 



Curve III. To show the effect of eliminating the records of Rat No. 22 from the 

 81st to the 86th trial. 



which was offered in the case of Curve I for the discrepancy 

 from the 81st to the 86th trial holds here. 



TABLE 2 



