226 KANSAS UNIVERSITY SCIENCE BULLETIN. 



pected that attention would be about equally divided between 

 speed and accuracy. The emphasis was not to be placed on 

 either phase of the test to the exclusion of the other. We 

 might, therefore, assume that this sort of variation would be 

 slight, except as it was brought about by the fatigue. We 

 are left with the conclusion that for Ca. physical fatigue 

 tended to decrease speed and to increase accuracy. That Ca. 

 was physically fatigued was quite certain. As has been men- 

 tioned, he was not a physically strong man, and he worked 

 faithfully. 



Similar fluctuations are evidenced in the results of the 

 other two subjects. Da. nearly always showed increased effi- 

 ciency in the second test, whether it is after rest or physical 

 work. His greatest increase is in speed after rest, but this 

 is partially counterbalanced by a decrease in accuracy. With 

 an increase in the duration of the physical work or an increase 

 in the weight to be lifted his speed decreases and accuracy 

 increases, very much as in the case of Ca. On the other hand, 

 Ba. is inclined to show a decrease in both speed and accuracy 

 after both rest and physical work, though this is not always 

 the case. After lifting a light weight ten minutes speed is 

 increased, while accuracy is about the same as after rest. 

 The nine-lap and eighteen-lap runs are quite uniformly fol- 

 lowed by decreases in speed and accuracy, on the whole, a 

 little below the decreases manifested after the rest periods ; 

 but the twenty-seven-lap runs effect an increase in speed, and 

 an increase in accuracy half the time, though the average of 

 the four tests gives a decrease. While these differences for 

 Ba. are slight, they are quite constant. Certainly the weight 

 of five kilograms could not be considered very fatiguing for 

 Da. and Ba. With the heavier weight Da. seemed fatigued, 

 though not what could be considered exhausted. Running on 

 the indoor track was only slightly fatiguing for Ba. at the 

 end of nine laps; he "felt tired" at the end of eighteen laps 

 (one mile) ; and he thought twenty-seven laps was the limit 

 of his endurance. Beyond thirty-six laps (in the next series) 

 he would not attempt to run. 



MULTIPLICATION TEST. 



Ba. was the only subject to be used with both the addition 

 and the multiplication tests. His results, therefore, form the 

 connecting link between the two tests for a basis of compari- 



