660 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Table 175. — Variables: Alpha score X alpha form. Group I: White draft. 

 For men who took alpha only or alpha and beta. 



[Vol. XV. 



Table 176. — Constants for alpha scores for each form of alpha. (Group I: white draft). 



It is evident that there are significant differences here. The difference for each pair of 

 forms is shown below, table 177. The probable error of the difference is in all cases less than 



0.012. , t , 



Table 177 .—Difference between mean scores, alpha forms. 



