<p>Convertion therapy utilizes traditional therapies (e.g., individual therapy) to change the sexual orientation of homosexuals/bisexuals to heterosexual. The Cuestionario Sobre Temas en la Terapia de Conversion (CTTC) was specifically designed to evaluate the opinion of a sample of Dominican clinical psychologists (N = 45) in relation with that therapeutic approach. The sample was integrated into three groups: Group 1 = psychologists treating clients with a homosexual/bisexual sexual orientation but without using conversion therapy (n = 15); Group 2 = psychologists who do not treat such clients and do not use that therapy (n = 15), and Group 3 = psychologists who use conversion therapy to change the sexual orientation of their clients from homosexual or bisexual to heterosexual. (n = 15). The results show that psychologists in Group 3 were more supportive of the use of conversion therapy in clinical services and also reported more negative opinions against homosexuals/bisexuals, in comparison of psychologists in Groups 1 and 2. The test-retest reliability del CTTC, assessed with Pearson r, was excellent (over 0.8). The internal consistency of the CTTC, assessed with the alpha (α) correlation of Cronbach ranged from α = 0.724 to α = 0.826.</p>