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MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



as to avoid the statistical errors involved in the previous studies. Before presenting this inves- 

 tigation it may be of interest to note the results of the Camp Devens study, which is quite 

 comparable to the Wads-worth study. 



This study is based on the results of the alpha examination of the May, June, and July 

 drafts of 1918 (literate whites). Fifty-seven occupations are presented, representing 15,122 

 men. The first quartile, median, and third quartile scores are given for each occupational 

 group. The results are shown in table 376. 



Table 376.- 



-Intelligence and occupation. Median and quartile scores of white drafts of May to July, 19 IS, in examination 

 alpha, Camp Devens, arranged alphabetically by occupation. 



The number of cases representing most of the occupational groups is large enough to 

 give reliable distributions of intelligence scores for those groups. The median and quartile 

 scores, however, are unreliable because they are based upon literate whites only. No indi- 

 cation is given concerning the method of occupational definition and the method of classifying 

 each case. 



