A crucial question in the investigation of personality differences between men and women is the number of dimensions needed t o account for these differences.
Early thinking in this area, as represented by such instruments as the Mf scale on the Minnesota Multiphasic Personality Inventory (MMPI), tended to postulate a single dimension of masculinity-femininity differences along which individuals might be ordered. Shepler (4) showed that both the Mf scale and the Drawing CompletionTest devised by Franck and Rosen ( 2 ) differentiated men from women but had only a low and insignificant correlation with one another. This raised the question of whether a single masculinity-femininity dimension was sufficient to account for the personality differences between men and women. Reedc3), comparing performances on the Mf scale, the Drawing Completion Test, and the Draw-A-Person Test in normal and psychotic women, has suggested a basic diff erentiation between performance on perceptual-motor and verbal tests of masculinity-femininity. He equates the former with id and the latter with superego functioning. If two verbal measures of masculinity-femininity are found to differentiate males from females but to show only a low relationship with one another, the adequacy of Reed's classification system may be questioned.