ABSTRACT
Outgroup homogeneity (OH) is the tendency to perceive members of one’s ingroup as being more variable than members of an outgroup. The OH effect has been identified using a variety of different measures (for a review, see Park & Judd, 1990). Measures of perceived group stereotypicality assess the degree to which group members are perceived to possess stereotypic versus counterstereotypic traits. OH is evident if outgroup members are perceived to be more stereotypical of the out-group than in-group members are perceived to be of the ingroup. Measures of perceived intragroup dispersion assess the degree to which group members are perceived to be dispersed around the group’s mean position. OH is evident if outgroup members are perceived to be less dispersed than in-group members. Measures of perceived intragroup similarity assess the degree to which group members are perceived to be similar to one another within their group. OH is evident if outgroup members are rated as being more similar to one another than ingroup members are to one another. Finally, name-matching measures assess intra-and inter-category confusions when attempting to recall matches between individual group members and information to which they have been previously linked (e.g., Lorenzi-Cioldi, Eagly, & Stewart, 1995). OH is evident if more intracategory confusions are made for outgroup members than for ingroup members.
