66 



HELEN B. HUBBERT 



3.50 



300 



^50 



instead of 788.5 cm. 1 So in the 84th trial. Here the recorder's 

 note-book states that after the first spurt, which occupied a little 

 over two minutes, the same rat, No. 22, refused to run and crouched 

 near the far partition in alley 1 for the remainder of the 15-minute 

 norm. Again throwing out his record, we have a time average 

 of 5.3 seconds instead of 359.8 seconds and a distance average of 

 4,480 cm., instead of 1,468 cm. In the 86th trial, he steadied 

 down and the throwing out of the record here gives 5.4 seconds 



no 



Curve II. Plotted from Table 2, which is the same as Table 1, except that failures 

 are eliminated. 



instead of 6.6 for time and 452.3 cm. instead of 45.1 cm. for dis- 

 tance. The small curve, Curve III, shows the effect of throwing 

 out the record of rat No. 22. The similarity of the time and 

 distance curves again becomes apparent. An additional factor 

 which must be considered in respect to both time and distance, 

 when interpreting the latter part of Curves I and II, is the small 

 number of rats then running. The best ones had dropped out 



4 It will be remembered that the minimum time may be taken as seven seconds 

 while the minimum distance is 448 cm. 



