Validation of a Revised Gender-Neutral Gender Identity/Gender Dysphoria Questionnaire for Adults and Adolescents (GIGDQ-AA-GN).

These studies adapted a gender-neutral version of the Gender Identity/Gender Dysphoria Questionnaire for Adults and Adolescents to align its wording with current understandings of gender diversity and inclusive terminology producing the GIGDQ-AA-GN; the psychometric properties of this updated measure were validated. A pilot study (N = 106) demonstrated the GIGDQ-AA-GN had excellent internal consistency (α =.98). A community-based sample was recruited online opportunistically in 2023, with an age range of 18-58 years and 12.73% self-identifying as transgender. Participants who self-identified as transgender scored significantly lower than those who did not (U = 12, p <.001, r =.642). A full validation study in 2024 (N = 467) demonstrated high internal consistency (α =.96). This study used similar recruitment methods, obtaining a more diverse sample with an age range of 18-55 years and 41.11% self-identifying as transgender and/or non-binary. Scores on the GIGDQ-AA-GN were significantly lower for participants self-identifying as transgender (U = 284, p <.001, r =.84) or non-binary (U = 7321.5, p <.001, r =.50) than those not identifying with the respective label, demonstrating strong discriminate validity. Principal axis factor analysis was run to examine whether the updated measure captured the same constructs as the original scale. This revealed two factors, ‘Gender Dysphoria’ and ‘Exploring Gender Identity’, that together explained 78.8% of variance; this differed to the original measure’s single factor but represented the constructs the measure aimed to capture. Psychometric findings suggest the revised GIGDQ-AA-GN shows promise as a more inclusive and conceptually up-to-date measure of gender experience.