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Gender-stereotyped beliefs develop early in childhood and are thought to increase with age based on prior research that was primarily carried out in Western cultures. Little research, however, has examined cross-cultural (in)consistencies in the developmental trajectory of gender-stereotyped beliefs. The present study examined implicit gender-toy stereotypes among 4- to 9-year-olds (N = 1,013; 49.70% girls) in Canada, China, and Thailand. Children from all three cultures evidenced implicit gender-toy stereotypes over this developmental period, but cultural differences in the developmental pattern and strength of these stereotypes were apparent. Gender-toy stereotypes were relatively strong and stable across age groups among Thai children and relatively weak and stable across age groups among Chinese children. Canadian 4- to 5-year-old children displayed weaker stereotypes, whereas 6- to 9-year-olds displayed stronger stereotypes. These findings highlight the contribution of culture to children's gender stereotype development. Although gender-toy stereotypes were found among 4- to 9-year-olds in all three cultures examined here, the strength of these stereotypes varies by culture. Furthermore, the previously described increase in gender stereotyping over this developmental period appears to not apply across cultures, thus challenging the conventional view on development in this domain based on prior, mainly Western, research.

Age-related differences in explicit and implicit racial biases in Black Cameroonians (N = 187, 94 females) were investigated using a cross-sectional design. Participants ranged in age from 3 to 30 years, and were from middle-to-high income families in Yaoundé, Cameroon. Biases were assessed by comparing attitudes toward Blacks with those toward Whites and Chinese. Implicit pro-Black/anti-other-race (White and Chinese) biases were present at age 4, in contrast to anti-Black/pro-other-race biases, which were observed among 9- to 30-year-olds. In addition, explicit pro-Black/anti-other-race biases that were present at age 4 were no longer evident by age 7. These findings provide a detailed picture of age-related differences in racial biases in an understudied part of the world that can inform theories regarding the development of racial biases, as well as efforts to reduce such biases.

Bilingual children have been shown to differ from monolingual children in several domains of human cognition. Comparatively few studies have investigated social-interactional processes in bilingual populations. Here, we investigated whether monolingual and bilingual children demonstrate similar susceptibility to an aspect of social functioning with broad societal reach: racial bias. We measured both implicit and explicit biases against African race individuals in 2 groups of monolingual preschoolers (native speakers of English or Chinese) and in 2 groups of English-Chinese bilingual preschoolers (tested in English or Chinese; total N = 160). We found that monolingual children demonstrated greater implicit bias against African race individuals than bilingual children, independent of their native language. Monolingual Chinese children demonstrated greater explicit bias than bilingual children, although monolingual English children's explicit bias scores did not differ from those of bilingual children. Findings are discussed in terms of cognitive and experiential mechanisms that may link bilingualism and racial bias.

We investigated the developmental courses of both implicit and explicit racial biases in relation to the perceived social status of outgroups. We did so by assessing these biases among Chinese participants (N = 200, age range from 4- to 19-year-olds) toward 2 different other-race groups that differ in terms of perceived social status (i.e., Whites and Blacks). At the youngest age, children showed both implicit anti-White and anti-Black bias at similar levels. However, these biases had different patterns of age-related change: implicit anti-Black bias remained strong and stable over time, whereas implicit anti-White bias declined after age 10. For explicit bias, children showed a decline in anti-Black and anti-White bias. Implicit and explicit biases were uncorrelated at all ages. The observed age-related changes demonstrate that it is possible for patterns of biases toward different races to diverge with age, and that perceived social status may contribute to the differential developmental patterns.

Two studies with preschool-age children examined the effectiveness of perceptual individuation training at reducing racial bias (Study 1, N = 32; Study 2, N = 56). We found that training preschool-age children to individuate other-race faces resulted in a reduction in implicit racial bias while mere exposure to other-race faces produced no such effect. We also showed that neither individuation training nor mere exposure reduced explicit racial bias. Theoretically, our findings provide strong evidence for a causal link between individual-level face processing and implicit racial bias, and are consistent with the newly proposed perceptual-social linkage hypothesis. Practically, our findings suggest that offering children experiences that allow them to increase their expertise in processing individual other-race faces will help reduce their implicit racial bias.