PSYCHOLOGICAL MEASUREMENTS. 



589 



Squad B 



55 



evident that with the uncontrolled eating there was a change, at least 

 with 5 out of 6 men, and the strength of grip had increased roughly 

 4.5 kg. with each hand. This is nearly enough to account for the 

 difference in level of the two squads shown in figure 107. If a compari- 

 son is made between the low-diet averages for the 6 subjects under 

 special consideration and the low-diet average for the whole group, as 

 shown in table 161 (48.1 and 44.7 for the right and left hands, respec- 

 tively), it will be noted that these 6 men average very nearly the same 

 as the whole group. It is therefore permissible to plot points on 

 figure 107, showing the level of the performance of May 21. This 

 has been done at the right side of the figure. These two points are 

 seen to be definitely above any other performance of Squad A and 

 to be in the range of Squad 

 B, although in the case of squadA 

 the right hand not so high.^ 

 The curves for the morn- 

 ing records (fig. 108) show 

 the interesting result that 

 both squads are a little 

 nearer the same level, al- 

 though Squad B is still at a 

 higher level than Squad A. 

 The gradual dechne shown 

 by the records of Squad B 

 from the first performance 

 of November 4 is striking. 

 Squad B made their best 

 morning record on the first 

 morning experiment, No- 

 vember 4. It is difficult to 

 assign a reason for this grad- 

 ual decline in succeeding 

 sessions. The conditions in 

 the morning were somewhat 

 different from those in the evening, since each subject was tested 

 by himself in room B; consequently, when the subject was making 

 his record he did not have the stimulating presence of someone 

 sitting at the side watching. It is possible that this factor may 

 be of considerable importance here, as it is frequently noted in the 

 literature on strength of grip and ergographic experiments. Squad 

 B with the left hand shows a marked drop on the three dates, Janu- 

 ary 14, 20, and 28, which were during the low diet. There was, 

 during the same period, a very slight rise in the record with the right 



50 



45 



40 



Fig. 108. — Averages for strength of grip at morning 

 sessions. 



R and L designate values for right and left hands. Solid 

 line curves represent Squad A, and broken lines, 

 Squad B. 



^ Of this group of 6 men tested on May 21, Pea and Spe were left-handed. 



