no. 3.] PSYCHOLOGICAL EXAMINING IN THE UNITED STATES ARMY. 643 



value. We have therefore to adopt the following method of treatment. Tests 4, 5, 6, and 7 

 we may consider as properly treated as a normal system in the same manner as the alpha tests. 



Table 160.— Variables: Beta total score X sum of scores in beta tests 4, 5, 6, 7. Group X: Special experimental group. 



A correlation has been formed for total beta score and for the sum of scores in tests 4, 5, 6, and 7. 

 (Table 160.) We find the correlation between these two sums to be 0.9795, and the regression 

 of beta (4, 5, 6, 7) on beta (total) is given by: 



0(4 5 o 7 ) = O.7O550t-O.3653 



By means of this equation we calculate sums of scores in beta (4, 5, 6, 7) for beta total scores 

 of 2$, 7$, 12$, etc., and proceed to analyze these into their typical components, as in the case 

 of alpha. Table 161 of typical deviation complexes results. 



We require four different regression equations, the longest of which has for its basic 

 determinant: 



Ra, 



1 



Table 161.- 



-Deviation values for every class-interval on the beta scale for tests 



(See text.) 



S, 6, and 7, and these tests together. 



