Objectives. The Lesbian, Gay, and Bisexual Identity Scale (LGBIS) is a well-known scale used to understand shared dimensions of sexual identity in otherwise diverse groups of non-heterosexuals. Yet only limited knowledge is available regarding the generalizability of the underlying psychological processes in regions such as Central and Eastern Europe. This study thus revisits the foundations of LGBIS and provides an in-depth examination of the psychometric properties of the new Czech adaptation. Method. The factor structure of LGBIS-CZ-6 was inspected via SEM. Convergent and content validity were examined via correlations with measures of related constructs (among others, psychological distress, suicidality, life satisfaction, social support, heterosexist harassment, rejection, and discrimination). Results. The results replicated the original structure of LGBIS on the Czech sample (N = 1 788) and proposed a better-fitting bifactor model. Generally, since LGBIS correlated with the majority of measures of related constructs in a predicted fashion, LGBIS-CZ-6 may be used as a well-functioning measure of the identity of non-heterosexuals. However, two subscales – internalized homonegativity and acceptance concerns showed problems with validity that might have arisen from Czech cultural specifics or by factors specific to broader post-socialist environments.

National Institute of Mental Health Klecany

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