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MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Table 30. — Devens literacy, mimeographed Form I — Trenton schools. 



[Vol. XV, 



Table 31.— Devens literacy, mimeographed Form II — Trenton schools. 



Table 32. — Devens literacy, mimeographed Form III — Trenton schools. 



The correlations between grade and score are: For Form I, C$872; for Form II, 0.889; 

 for Form III, 0.857; for Form IV, 0.895. 



In general, practice appears to have little influence upon scores attained in the test. The 

 median score for all forms taken together and given first is 20.6; given second, 20.4; given 

 third, 20.7; given fourth, 20.9. Even in the lower grades the first trials give practically as high 

 median scores as the fourth trial, though one might suppose that the more complete under- 

 standing of instructions in the later trials might make for increased score, particularly in these 

 grades. As the distribution tables show, Form I is easy, Forms II and IV are intermediate and 

 about equal, and Form III is the hardest. The approximate medians, with all grades grouped, 

 are : For Form I, 25 ; for Form II, 21 ; for Form III, 16.5 ; for Form TV, 20. Further evidence of 

 reliability appears from the fact that the scores obtained by individuals in Form I correlate 

 0.891 with their score in Form II, and 0.931 with their average scores on all four forms. 



