Evidence against the “anomalous-is-bad” stereotype in Hadza hunter gatherers

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Abstract

People have an “anomalous-is-bad” stereotype whereby they make negative inferences about the moral character of people with craniofacial anomalies like scars. This stereotype is hypothesized to be a byproduct of adaptations for avoiding pathogens. However, evidence for the anomalous-is-bad stereotype comes from studies of European and North American populations; the byproduct hypothesis would predict universality of the stereotype. We presented 123 Hadza across ten camps pairs of morphed Hadza faces—each with one face altered to include a scar—and asked who they expected to be more moral and a better forager. Hadza with minimal exposure to other cultures chose at chance for both questions. Hadza with greater exposure to other cultures, however, expected the scarred face to be less moral and a better forager. These results suggest the anomalous-is-bad stereotype may be culturally shared or learned erroneously through associations with population-level differences, providing evidence against a universal pathogen avoidance byproduct hypothesis.

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Workman, C. I., Smith, K. M., Apicella, C. L., & Chatterjee, A. (2022). Evidence against the “anomalous-is-bad” stereotype in Hadza hunter gatherers. Scientific Reports, 12(1). https://doi.org/10.1038/s41598-022-12440-w

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