582 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



we had no control interfered and this part of the plan failed to material- 

 ize. Strength of grip was therefore made a part of the psychological 

 program to help offset this deficiency. There are no records for the 

 normal session of Squad A, i. e., for September 29, with which the later 

 ones may be compared. The results from tests made in the evening 

 are given in tables 161 and 162 and entered separately for right and 

 left hands. Five trials were made alternately with each hand, the 

 figure given being the average of the five in kilograms. For each 

 average there is a standard deviation and coefficient of variability. 



In the evening records of Squad A (table 161), October 27 to 

 February 2, inclusive, are during the low-diet period. As would be 

 expected, the total individual averages are higher for the right hand 

 than for the left.^ The average for the right is 48.1 and for the left, 

 44.7, with a difference of about 3.5 kg. The individuals are very 

 closely grouped. For the right hand the range is from 56.6 (Gul) to 



41.6 kg. {Pea). The last-mentioned subject was left-handed. Kon 

 shows almost equally good scores for both his hands. His record for 

 the left hand of 54.8 kg. is the highest for the squad; the lowest average 

 record with the left hand is 36.0 kg. for Mon. Five trials is not a large 

 number from which to compute variabiUty, but with the strength of 

 grip test it is not desirable to take a large number of trials, since the 

 element of fatigue soon enters as a prominent factor. 



As explained in the section on method (page 150), the trials were 

 separated by suitable intervals to minimize fatigue and to secure as 

 nearly as possible an even performance. The general success of this 

 can be judged definitely by the average coefficients of variabihty shown 

 in the extreme right-hand column of the table with the other averages; 

 these range from 3 to 6 per cent. Inspection of the table will show 

 that the individual subjects were remarkably consistent in showing 

 this small variability. The largest variability was with Pea on 

 January 12 for the right hand — 18.3 per cent. For this there is an 

 explanation in that the subject had a sprained wrist which pained him 

 when he used his full strength. 



Squad B (table 162) showed averages higher than those of Squad A. 

 The general averages for the four normal experiments are 55.1 kg. for 

 the right hand and 51.6 kg. for the left as compared with 48.1 and 



44.7 kg. for right and left, respectively, of Squad A. The individual 

 subjects are here also very closely grouped about the general average.^ 

 Squad B in its low-diet averages for January 13, 19, and 27 has a total 

 average for the right hand slightly above the normal (56.1 compared to 

 55.1 kg.) and for the left hand slightly below nornml (50.9 compared 



^ In Squad A Pea and Spe were left-handed. 



* Kim, Liv, Sch, and Wil, of Squad B, were left-handed ; the first two are not included in the 

 general averages. ' 



