PSYCHOLOGICAL MEASUREMENTS. 



623 



65.6 oscillations. For the three evening experiments during the 

 reduced diet period the average is 62.7 oscillations, a reduction from 

 the normal average of 2.9 oscillations, which corresponds to 4.4 per 

 cent. The difference between the normal of Squad A and the average 

 for their nine low-diet periods is 3.6 oscillations, amounting to 5.2 

 per cent of the normal. 



Table 183. — Squad B — Number of finger movements performed in 10 seconds at evening 



The course of the changes in these finger-movement records is made 

 clear by figure 119. There are fluctuations, but it is very evident that 

 Squad A on the average for the 10 men did better in their normal ex- 

 periment than at any other time. The total number of finger move- 

 ments in 10 seconds rather regularly decreased to December 8. There 

 was some recovery on December 19 and January 12, a conspicuous 



