HABIT FORMATION IN THE ALBINO RAT 



The averages for this group are: 



Time 



Distance 



31 



Trials Absolute 



Total 



Speed 



42 



8.6 sees. 351 min. 339.1 m. 16 cm. per sec. 



FIGURE 5-A Trial Curve for Two Hundred Day Rats 



The apex of the trial curve, Fig. 5-A, lies at thirty-three, 

 while the average for the group is forty-one, but the explanation 

 of the apparent discrepancy is to be found in the records of 

 the six rats who required from fifty-six to one hundred twelve 

 trials to learn the problem, thus running the group average up. 

 No well defined apex can be found in the time curve (Fig. 5-B), 

 the group average, twenty-one hundred seconds showing rather 

 as a depression, nor could it be divined by a glance at the dis- 

 tance curve (Fig. 5-C) that the average lay in the neighborhood 

 of thirtv-three thousand centimeters. 



