Measuring Propensity to Perpetrate Microaggressions Toward LGBTQ Individuals: Sexual Orientation Microaggression Scale (SOMS-P) and Gender Identity Microaggression Scale (GIMS-P) Perpetration Version

This study is an initial psychometric evaluation of the Sexual Orientation Microaggression Perpetration Scale (SOMS-P) and Gender Identity Microaggression Perpetration Scale (GIMS-P). Using data from 2,059 undergraduate students (Mage = 21.37, SD = 4.98; Range 18-68; 78.6% assigned female at birth, 13.3% self-identified as sexual minority person), item factor analysis for binary indicators and model comparisons indicated that a correlated four- and five-factor solution for the SOMS-P and GIMS-P, respectively, outperformed a one-factor and higher-order solutions. SOMS-P and GIMS-P scores were positively associated with self-reports of bullying, violence perpetration, and hostile attitudes toward individuals who self-identify as sexual or gender minorities. They were negatively associated with attitudes supportive of sexual or gender minority persons. Reliability of .80 and higher was observed only for theta values between + 0.40 to + 2.60 SD. The psychometric evaluation showed that, while there remain to be opportunities to examine their validity across diverse contexts, SOMS-P and GIMS-P are sound measures of the propensity for SOGI microaggression.