Children can employ genetic explanations in principled ways as early as 7 years of age but such explanations are used to account for a wider range of features by adults

Meyer, M., Roberts, S. O., Jayaratne, T. E., & Gelman, S. A. (2020). Children’s beliefs about causes of human characteristics: Genes, environment, or choice? Journal of Experimental Psychology: General. Mar 2020. https://doi.org/10.1037/xge0000751

Abstract: To what extent do our genes make us nice, smart, or athletic? The explanatory frameworks we employ have broad consequences for how we evaluate and interact with others. Yet to date, little is known regarding when and how young children appeal to genetic explanations to understand human difference. The current study examined children’s (aged 7–13 years) and adults’ explanations for a set of human characteristics, contrasting genetic attributions with environmental and choice-based attributions. Whereas most adults and older children offered an unprompted genetic explanation at least once on an open-ended task, such explanations were not seen from younger children. However, even younger children, once trained on the mechanism of genes, endorsed genetic explanations for a range of characteristics—often in combination with environment and choice. Moreover, only adults favored genetic explanations for intelligence and athleticism; children, in contrast, favored environment and choice explanations for these characteristics. These findings suggest that children can employ genetic explanations in principled ways as early as 7 years of age but also that such explanations are used to account for a wider range of features by adults. Our study provides some of the first evidence regarding the ways in which genetic attributions emerge and change starting in early childhood.