Psychometric assessment of the persian version of a dimensional instrument to measure gender identity disorder

Abstract

Abstract: Introduction & Aim: Regarding dimensional approachto the gender dysphoria, the aim of the presentstudy was to evaluate validity and reliability of the DimensionalMeasure of Gender Identity Disorder Questionnairein Persian.Methods: Participants included 62 patients with genderdysphoria (46 female-to-male patients, and 16 male-tofemalecases) and 150 people as the control group (83women and 67 men) along with parents or close relativesof 34 patients. The questionnaires given to participantsincluded Persian version of the Dimensional Measure ofGender Identity, together with the Bem Sex Role Inventory,and Gender-Masculine and Gender-Feminine scalesderived from Minnesota Multiphasic Personality Inventory-2 (MMPI-2).Results: The adolescents’ form of the Dimensional Measureof Gender Identity Disorder Questionnaire showeda poor correlation with gender roles. Cronbach’s alphawas 0.992 for men and 0.989 for women. Factor analysisshowed one-factor solution in both groups and explained92.6% of the total variance in men and 92.3% in women.The correlation between adolescents (reported by theperson) and childhood (reported by parents) forms of thequestionnaire was 0.59 in men and 0.61 in women.Conclusion: The Persian version of the Dimensional Measureof Gender Identity Disorder Questionnaire showedsatisfactory internal consistency and diagnostic value,with a single factor structure in both men and women.This questionnaire measures gender identity irrespectiveof gender roles. However, psychometric features of thequestionnaire should be assessed in other clinical groups.