SEX DIFFERENCES IN COLOR PERCEPTION 



211 



The results show that in the discrimination of reds the women are 

 superior to the men. The average number of displacements for men 

 of 6.0 and for women of 5.3, with probable errors of 0.30 and 0.21, 

 respectively, indicate a significant superiority in women. The median 

 value shows a less marked difference, due to the fact of several widely 



Fig. i. — Distribution of Errors in Color Tests showing greater range and 

 variability in men. 



divergent records in the men. In variability the men are markedly 

 more variable than women as is indicated by the mean variation of 

 2 . 1 in men and 1 . 5 in women and the coefficient of variability of 35 per 

 cent and 28 per cent. The probable errors of the mean variations are 

 0.21 for men and 0.15 for women. In range the records of men run 

 from 1 . 4 to 1 1 . 1 and for women from 2.1 to 10 . 2. 



Fig. 1 gives the distribution of errors in the test, the abscissae repre- 



