Two field studies demonstrated that majority and minority size moderate perceived group variability. In Study 1 we found an outgroup homogeneity (OH) effect for female nurses in the majority, but an ingroup homogeneity (IH) effect for a 'token' minority of male nurses. In Study 2 we found similar effects in a different setting, an OH effect for policemen in the majority and an IH effect for policewomen in the minority. Although measures of visibility, status and, especially, familiarity tended to show the same pattern as perceived variability, there was no evidence that they mediated perceived dispersion. We discuss results in terms of group size, rather than gender, as moderators of perceived variability, and Kanter's (1977a, b) theory of group proportions.
3Perceptions of gender group variability in majority and minority contexts:Two field studies with nurses and police officersThe reliable tendency to perceive outgroups as less variable, or more homogeneous, than ingroups (the 'outgroup homogeneity effect'; Jones, Wood & Quattrone, 1981) has widespread consequences for stereotyping and intergroup relations (see Park, Judd & Ryan, 1991).Perceiving an outgroup as relatively homogeneous can increase the impact of categorical versus individuating information (Krueger & Rothbart, 1988), the likelihood that perceivers judge specific individuals in a stereotypic manner (Ryan, Judd, & Park, 1996), and the recall advantage of stereotype-congruent information (Pendry & Macrae, 1999). By affecting these processes, perceived homogeneity tends to enhance stereotype maintenance (Hewstone & Hamberger, 2000) and may promote intergroup bias (Wilder, 1978).Despite the profusion of laboratory studies of perceived variability (for reviews, see Devos, Comby & Deschamps, 1996;Linville, 1998;Ostrom & Sedikides, 1992;Voci, 2000), there have been relatively few field studies using natural groups. It is, however, important that we continue to study such phenomena outside the laboratory, because natural groups pose fascinating questions, the answers to which ultimately enrich our theories. Yet, the use of natural groups frequently brings with it unavoidable confounds (as between group size, status and power; see Farley, 1982), which limit our ability to draw precise conclusions from them. Brown and Smith (1989) investigated men and women academics' perceptions of their gender ingroup and outgroup in their university, where women were in a very small numerical minority, and had low status compared with men. They found that both participant groups rated the female minority more homogeneous than the male majority (i.e., the women rated their ingroup more homogeneous than the outgroup, whereas the men rated their ingroup more heterogeneous than the outgroup). Brown and Smith concluded that academic men, the majority, showed an outgroup homogeneity, or OH, effect, whereas academic women, the minority, showed an opposite, ingroup homogeneity, or IH, effect (Smith & Brown, 1987).