M-F: biopolar and probably multidimensional.

Scores on the MMPI MF scale and the WAIS M-F index were found not to be correlated highly with each other, but to be correlated significantly with self-rated sexual orientation in a mixed-sex group of Ss. Only when the implicit bipolarity of each of the test scales were taken into account were the scales significantly related to sexual orientation. The combination of the two M-F indices accounted for significantly more of the variance in sexual orientation than either scale alone. The results suggest that M-F may be considered accurately to be both a bipolar and a multidimensional construct.