Do White People See Variation in Black Skin Tones? Reexamining a Purported Outgroup Homogeneity Effect

Previous research has reported that white survey interviewers remember black respondents’ skin tones in a much narrower range than recollections by black interviewers. This finding has been used to suggest that, in line with the one-drop rule, whites do not perceive meaningful differences between light- and dark-skinned black people. The authors reanalyze evidence thought to demonstrate relative homogeneity in white interviewers’ evaluation of black skin tones. In contrast to previous studies, this examination of several data sources reveals significant heterogeneity in the ratings assigned by white interviewers when taking into account the ordinal nature of the skin tone measures. The results are consistent with theories of social cognition that emphasize that beyond formal racial classification schemes, skin tone is used to implicitly categorize others along a continuum of “blackness.” The findings also align with research suggesting that rather than nullifying within-race skin tone, increases in white racism intensify white colorism.

Human face-selective cortex does not distinguish between members of a racial outgroup

People often fail to individuate members of social outgroups, a phenomenon known as the outgroup homogeneity effect. Here, we used fMRI repetition suppression to investigate the neural representation underlying this effect. In a pre-registered study, White human perceivers (N = 29) responded to pairs of faces depicting White or Black targets. In each pair, the second face depicted either the same target as the first face, a different target from the same race, or a scrambled face outline. We localized face-selective neural regions via an independent task, and demonstrated that neural activity in the fusiform face area distinguished different faces only when targets belonged to the perceivers’ racial ingroup (White). By contrast, face-selective cortex did not discriminate between other-race individuals. Moreover, across two studies (total N = 67) perceivers were slower to discriminate between different outgroup members and remembered them to a lesser extent. Together, these results suggest that the outgroup homogeneity effect arises when early-to-mid-level visual processing results in an erroneous overlap of representations of outgroup members.

Neural adaptation to faces reveals racial outgroup homogeneity effects in early perception

A hallmark of intergroup biases is the tendency to individuate members of one’s own group but process members of other groups categorically. While the consequences of these biases for stereotyping and discrimination are well-documented, their early perceptual underpinnings remain less understood. Here, we investigated the neural mechanisms of this effect by testing whether high-level visual cortex is differentially tuned in its sensitivity to variation in own-race versus other-race faces. Using a functional MRI adaptation paradigm, we measured White participants’ habituation to blocks of White and Black faces that parametrically varied in their groupwise similarity. Participants showed a greater tendency to individuate own-race faces in perception, showing both greater release from adaptation to unique identities and increased sensitivity in the adaptation response to physical difference among faces. These group differences emerge in the tuning of early face-selective cortex and mirror behavioral differences in the memory and perception of own- versus other-race faces. Our results suggest that biases for other-race faces emerge at some of the earliest stages of sensory perception.

De l’Idéologie à la Perception Sociale

This article investigates how our cognitions are influenced by various values of liberal ideology. Two pre-tests were used to identify two ordinary and daily objects (advertising and coaching) as vectors of liberal ideology. We used these objects to prime liberal values in two experiments. The results confirmed our hypotheses. The first experiment showed that liberal priming is more conducive to competitive decisions than to neutral decisions. Similar results have been found with respect to competitive attitudes. In the second experiment, as compared to neutral priming, liberal priming was found to be more conducive to perceived outgroup homogeneity. Similar results have been found with respect to responsibility judgment. The results are discussed in view of the social perception framework.

Perceptions of Gender Group Variability in Majority and Minority Contexts

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. Results are discussed in terms of group size, rather than gender, being moderators of perceived variability, and with reference to Kanter’s (1977a , 1977b ) theory of group proportions.