no. 2.] PSYCHOLOGICAL EXAMINING IN THE UNITED STATES AEMY. 461 



Table 129. — Comparison of alpha tests. 



[The columns of numbers not in parentheses are the numbers of the eight alpha tests arranged in order of their efficiency in differentiating the two 

 military groups named at the head of the column: the test listed at the head of the column is the test that differentiates best. The numbers 

 m parentheses are the numbers of those tests which are so superior or inferior in differentiating capacity to the test beside which they are placed 

 as to give, when compared with that test, a difference in the values of x s of 10 or more. For the significance of differences in values of x* greater 

 than 10 as criteria of reliability, see discussion in the text.] 



" Poorest " Order of tests Fid^Artil'- 



(5 



8 



(12 



(12 



(12 3 



Infantry v. 

 standard. 



(4567) 

 5 6 7) 

 6 



6 

 5 

 C> 

 3 



4 



7) 

 7) 

 6) 

 8) 

 8) 

 8) 



by lengths of 

 range of tests. 



4 5 6) 



Table 130. — Comparison of alpha tests. 

 [See legend to Table 129.] 



6) 



Table 131. — Comparison of alpha tesU. 

 [See legend to Table 129.] 



