An MMPI subscale (Gd): to identify males with gender identity conflicts.

This study reported on the development and cross-validation of a 31-item MMPI Gender Dysphoria subscale (Gd) which accurately discriminates between gender identity patients and matched controls, and identifies males with gender dysphoria syndrome. Both the validity and reliability of the Gd scale has been demonstrated and there is every expectation that the scale has excellent potential for clinical usage. In the construction of the Gd scale, we have addressed the major methodological problems of previous studies which have used psychological tests to assess gender role and identity disturbances: small criterion groups, a lack of an appropriate control group, and prediction of too many false positives.