No. 3.] PSYCHOLOGICAL EXAMINING IN THE UNITED STATES ARMY. 815 



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Fig. 56. Intelligence ratings and age. Percentage comparison of letter grades for different age groups of 15,385 white officers. 



A study was mads at Camp Dix of the relation between age and score (alpha) for officers. 

 Three groups were compared — line officers, quartermaster officers, and medical officers. Table 

 367 indicates roughly the variation of score with change in age groups. The table shows a 

 slight lowering of the score with increasing age. In the three age groups, line officers maintain 

 their percentage for scores of 350 and above. Medical officers show increase in the number 

 scoring above 350. All three branches give increases in numbers and percentages of those 

 scoring below 250. However, the differences for the age groups are slight. The range (Q 3 -Qi) 

 increases with increasing age. The general trend of the medians is downward with the higher 

 ages. 



