Prejudiced perceivers see outgroups as more homogeneous and more stereotypic than ingroups

Evidence

In particular, prejudiced perceivers may tend to overestimate the relative degree to which outgroups possess stereotypic attributes and underestimate the extent to which they manifest within-group variability. Such a bias would be consistent with the welldocumented tendency towards outgroup homogeneity (Park & Judd, 1990; Park & Rothbart, 1982): perceiving the outgroup to be more stereotypic and less dispersed than the ingroup. — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 864

These three forms of stereotype inaccuracy – stereotypic inaccuracy, dispersion inaccuracy, and valence inaccuracy – tend to take on certain expected directions in the intergroup literature, based on the notions that prejudice guides intergroup stereotypes. The most obvious effect of intergroup hostilities should be on valence inaccuracy, with actual group differences between the ingroup and the outgroup overestimated on dimensions that favor the ingroup and underestimated on dimensions that favor the outgroup. It may also be the case that more prejudiced social perceivers see larger group differences in general than actually exist, regardless of the valence of the attribute dimensions. In particular, prejudiced perceivers may tend to overestimate the relative degree to which outgroups possess stereotypic attributes and underestimate the extent to which they manifest within-group variability. Such a bias would be consistent with the welldocumented tendency towards outgroup homogeneity (Park & Judd, 1990; Park & Rothbart, 1982): perceiving the outgroup to be more stereotypic and less dispersed than the ingroup. — , Rudman, Laurie A - On the Nature of…, 863

Categorization

• XREF: Connects to outgroup homogeneity effect literature and to the ingroup/outgroup accuracy debates in social psychology — resonates with the reader’s prior work on stereotyping and metaperception.
• corroborated: 3 independent passages support this claim — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice: Fifty Years…, 864; , Rudman, Laurie A - On the Nature of…, 863