UTILIZATION OF BRAIN POWER IN ARMY 209 



tional classification of soldiers in the army afforded op- 

 portunity for a study of the relation of intelligence to 

 occupation. Various features of this relation are exhibited 

 for a few military occupations by Fig. 12, in which are 

 represented the proportions of the several grades of in- 

 telligence for the several occupations. 



In order of diminishing intelligence exhibited these 

 groups may be classified as follows: professions, clerical 

 occupations, trades, partially skilled labor and unskilled 

 labor. The greatest differences in intelligence required or 

 exhibited appear at the upper end of the scale, whereas 

 the differences within the trade group are relatively small. 

 The differences in range of intelligence occurring in the 

 several occupations are considerable and in all probability 

 significant. In general the range diminishes from un- 

 skilled labor to intellectually difficult professions. 



The data of this occupational study, which are merely 

 sampled by Fig. 12, suggest both the possibility and de- 

 sirability of preparing intelligence specifications for use 

 in connection with civilian occupations. Such specifica- 

 tions, if satisfactorily prepared, should be useful alike as 

 partial basis for educational advice and procedure and 

 subsequently for vocational guidance. It must be em- 

 phasized in this connection that the data of Fig. 12 are 

 not strictly comparable with such information as may be 

 gathered concerning civilian groups because various se- 

 lectional factors operate in the army. 



The Applicability of Mental Measurements. The utili- 

 zation of methods of mental testing by the army has at 

 once increased military efficiency by the improved utili- 

 zation of brain power and demonstrated the applicability 

 of the group method of measuring intelligence to educa- 

 tional and industrial needs. The army methods, although 

 not adapted to the usual educational or industrial re- 

 quirements, can readily be modified or used as a basis for 

 the development of similar procedures. 



There are abundant indications that the future will wit- 



