FACTOR ANALYSES WERE PERFORMED UPON FOUR MASCULINITY-FEMINITY (MF) SCALES AND UPON THE 136-ITEMS COMPRISING THESE SCALES. RESULTS OF THE FIRST ANALYSIS ILLUSTRATED THE DIFFICULTY OF INTERPRETING FACTORS BASED ON HETEROGENEOUS SCALES. THE ITEM FACTORING REVEALED THE MULTIDIMENSIONALITY OF MF. CERTAIN ITEM FACTORS WERE UNCORRELATED WITH SEX STATUS AND IMPAIR THE MEASUREMENT OF MF BY THESE SCALES. IT IS SUGGESTED THAT THESE CONFOUNDING SOURCES OF VARIANCE BE ELIMINATED FROM MF MEASURES AND THAT FUTURE MF SCALES RECOGNIZE THE MULTIDIMENSIONALITY OF PSYCHOLOGICAL SEX DIFFERENCES. (AUTHOR)