202 CONTEMPORARY SCIENCE 



the past year settle this question definitely by indicating 

 a relatively high correlation between officers' judgments 

 of military value and the intelligence rating. 



The various figures herein described are presented not 

 as a summary of the results of psychological examining in 

 the army but instead as samples of these results, the 

 chief value of which is to indicate their principal relation- 

 ship and practical values. 



Military Applications of Mental Ratings. By sample 

 distribution curves Fig. i indicates the value of mental 

 ratings for the identification and segregation of different 

 kinds of military material. The illiterate group of this 

 figure was examined by means of Beta, all other groups 

 by means of Alpha. 



Comparison of various military groups distinguished 

 from one another by actual attainment in the service 

 shows that the psychological tests discriminate between 

 these groups with definiteness. This point may be illus- 

 trated by reference to the percentages of men of different 

 groups making A and B grades in Examination Alpha : 

 officers, 83.0 per cent. ; officers' training school candi- 

 dates, 73.2 per cent. ; sergeants, 53.4 per cent. ; corporals, 

 39.7 per cent. ; literate privates, 18.8 per cent. The com- 

 parison of measures of central tendency reveals equally 

 striking differences. Moreover, within the officer group 

 itself significant differences appear for different branches 

 of the service. 



The relation of success or failure in officers' training 

 schools to intelligence ratings is exhibited by Fig. 2, in 

 which it is indicated that elimination through failure in 

 the school increases rapidly for ratings below C +. Of 

 men rating above C -\-, 8.65 per cent, were eliminated; of 

 those below C +> 52.27 per cent. The data for this figure 

 were obtained from three schools with a total enrollment 

 of 1,375 men. 



Similarly Fig. 3 indicates the relation between success or 

 failure in non-commissioned officers' training schools and 



