Androgyny has been advocated as the most adaptive mode of human functioning, yet empirical studies suggest that masculinity alone may be the key factor in self-esteem. To investigate this, 237 students completed 3 sex role instruments (the Bem Sex-Role Inventory, the ANDRO, and the Desirability scales of the Personality Research Form) and 2 measures of self-esteem (Personal Attributes Questionnaire and the Janis-Field Feelings of Inadequacy Scale). In every case masculinity showed significant positive correlations with self-esteem in both sexes, whereas the correlations with femininity were generally nil or slightly negative. (11 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1979 American Psychological Association.