No. 2.] 



PSYCHOLOGICAL EXAMINING IN THE UNITED STATES AKMY. 



Table 93. — Correlations of beta tests with officers' ratings. 



433 



As is the case of the correlations with total score it seems desirable to adjust these corre- 

 lation coefficients to a common basis. Since the alpha before beta group has the largest 

 standard deviations (with the one exception noted above) it has been chosen as the standard. 

 The adjusted correlation coefficients for the alpha tests are given in Table 94. 



Table 94. — Alpha tests. 



The standard deviatious of beta tests for the different groups are not so uniform as the 



standard deviations of alpha tests. Especially outstanding are the differences between groups 



beta before alpha and Beauregard-MacArthur with respect to test 2, and groups alpha before 



beta and beta before alpha with respect to test 6. These divergences tend to confirm the 



suspicion already formed that there has been lack of uniformity in the examination procedure. 



If this has been the fact the comparison of ratings from the point of view of the beta tests, and 



the converse comparison of the beta tests on the basis of ratings, will be of somewhat impaired 



validity. With this reservation the adjusted values of the correlation coefficients for the beta 



tests are given (table 95). 



Table 95. — Beta tests. 



The results shown' in tables 94 and 95 indicate a variability of correlation between ratings 

 and test performance not to be explained away on the hypothesis of accidental factors. After 

 the differences in the groups have been ruled out by the method of adjusting the correlation 



