Social categorization in minority influence: The case of homosexuality

Three experiments were conducted in order to compare the influence of ingroup and outgroup minorities and to assess the role of Zeitgeist perception in minority influence. The results confirmed that ingroup minorities are more influential than outgroup minorities. This overall finding was observed in two different experimental paradigms, using either a small group setting in which subjects interacted with the minority or the simultaneous social influence paradigm in which both influence sources impinge simultaneously (via written information) upon the subjects. These results were supportive of Tajfel's social identity theory while contradicting Kelley's augmenting/discounting principle. Finally, subjects' perception of the Zeitgeist was unrelated to the magnitude of minority influence.