Further evidence that M-F is bipolar and multidimensional.

Conducted a study to identify a set of cognitive skills tests on which there are significant sex differences. The main study determined the comparability of several bipolar M-F scales and the relations between the full range of scores on each of those bipolar M-F scales and self-rated sexual orientation; 110 females and 113 males completed six cognitive tests, the Bem Sex Role Inventory (BSRI), the Minnesota Multiphasic Personality Inventory (MMPI) and the Kinsey Sexual Orientation scale (KSO). Correlations in the combined-sex group were substantially higher than in either of the single-sex groups. Each of the several M-F measures was related significantly to sexual orientation in the combined-sex group, and the combination of the MMPI Mf scale and the Bem Androgyny Score accounted for a small but significantly greater portion of the variance in self-rated sexual orientation than did the MMPI Mf scale alone. The data support the view that M-F may be considered to be a bipolar and probably multidimensional variable.