Gender discriminating vocabulary tests administered to a consecutive series of 53 male transsexuals show different results. The Slater Selective Vocabulary Test, Cohen’s factors and the Terman-Miles Attitude Interest Analysis Test (M-F) show male transsexuals to have a higher degree of feminization than normal controls. The Wechsler-Bellevue Vocabulary Test and the Wechsler M-F Test are difficult to interpret, and do not show a clear trend of feminization in transsexual males. The investigation has shown that male transsexuals have a vocabulary which differs from that of normal males in the direction of greater feminization.