254 



SCIENCE 



[N. S. Vol. XLIX, No. 1263 



Rating D- D C- C C* B 



Fig. 6. Intelligence grades of "best" ( ) 



and "poorest" ( ) privates. (Best, 606; 



poorest, 582; total, 1,188.) 



group ol Fig. 5 is 28 points in an examina- 

 tion whose maximal score is 212 points. 

 By contrast with this, the median score of 

 the "hest" group of privates is 99 points. 

 , The commanding officers of ten different 

 organizations, representing various arms 

 of the service, in a certain camp were 

 asked to designate (1) the most efficient 

 men in their organizations, (2) the men 

 of average ability and (3) men so inferior 

 that they are "barely able" to perform 

 their duties. 



The officers of these organizations had 

 been with their men from six to twelve 

 months and knew them exceptionally well. 

 The total number of men rated was 965, 

 about equally divided among ''best," 

 "average," and "poorest." After the 

 officers' ratings had been made, the men 

 were given the usual psychological test. 



D-D C- e C+ B A 



Fig. 7. Men of "low military value" ( ) 



(147), compared witli a complete draft quota 

 12,341, ( ). 



Comparison of test results with officers' 

 ratings showed: 



(a) That the average score of the "best" 

 group was approximately twice as high 

 as the average score of the "poorest" 

 group. 

 (h) That of men testing below C — , 70 

 per cent, were classed as "poorest" 

 and only 4.4 per cent, as "best." 



(c) That of men testing above C +) 15 

 per cent, were classed as "poorest" 

 and 55.5 per cent, as "best." 



(d) That the man who tests above C + 

 is about fourteen times as likely to be 

 classed "best" as the man -wiho tests 

 below C — . 



(e) That the per cent, classed as "best" 

 in the various groups increased stead- 

 ily from per cent, in D — to 57.7 

 per cent, in A, while the per cent. 



