Human–rights organizations and prisoner advocacy groups try to create positive attitudes toward liberal prison reform by emphasizing similarities between the public and prisoners. Theories of similarity and attraction, however, suggest that this strategy can backfire. Although it commonly increases liking, similarity can increase rejection when the similar other is stigmatized. An experiment tested the efficacy of appeals to similarity in changing prison reform attitudes. Republicans and Democrats listed aspects of themselves that made them similar to or different from prisoners, and then they completed a measure of prison reform attitudes (Silvia, 2003). Emphasizing similarity between the participant and prisoners did not always cause positive attitudes. After focusing on similarity to prisoners, Democrats reported more liberal prison reform attitudes, and Republicans reported more punitive attitudes. Implications for changing attitudes toward prison reform are discussed.