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201819 https://hdl.handle.net/2286/R.2.N.201819 http://rightsstatements.org/vocab/InC/1.0/ All Rights Reserved 2025 369 pages Masters Thesis Academic theses en Kilby, Raeanna Cassidy Mickelson, Kristin D. Koop, Gregory Hall, Deborah Arizona State University Partial requirement for: M.S., Arizona State University, 2025 Field of study: Psychology Transgender and gender diverse (TGD) communities experience higher rates of disordered eating behaviors and beliefs compared to cisgender populations, yet the mechanisms driving these disparities remain largely unexplored. This study examines an integrated version of the minority stress and tripartite influence models, incorporating population-specific factors (e.g., LGBTQ+ appearance pressures and in-group discrimination) and novel mediators (appearance rejection anxiety and control beliefs) to better explain the maintenance of disordered eating in gender minorities. Self-identified transgender and gender diverse adults (N = 357; n = 122 binary; n = 217 nonbinary) completed an online, cross-sectional survey that assessed sociocultural influences (e.g., tripartite influence), minority stress, appearance rejection anxiety, body dissatisfaction, control beliefs, and disordered eating behaviors and beliefs. Drive for Muscularity and Eating Attitudes were explored in two separate models using structural equation modeling. Across the two models, results provided support for the integrated models’ ability to explain disordered eating within TGD communities with minority stress exerting the largest total effects on disordered eating. However, model pathways varied by type of disordered eating behavior and gender identity, with sociocultural expectations uniquely related to outcomes in binary, but not nonbinary participants. Findings extend existing literature by indicating that minority stress, sociocultural influences, control beliefs, and appearance rejection anxiety may serve as risk factors for disordered eating within TGD communities, but that the underlying mechanisms of disordered eating may differ based on both individual identity and the specific behaviors involved. Psychology Appearance Rejection Anxiety Eating Disorders minority stress Perception of Control Transgender and Gender Diverse Tripartite Influence Model Eating Disorder Behaviors in Transgender and Gender Diverse Adults: Integrating Minority Stress Theory and the Tripartite Influence Model