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Genes-in-Dyads: A Study of Relationship Quality
1Department of Sociology, 5620McGill University, Montreal, Quebec, Canada.
Objectives:
Using dyadic genetic information on older couples, this study queried associations of a polygenic score for well-being with one's own as well as a partner's relationship experiences.
Method:
Data were from the 2010 wave of the U.S. Health and Retirement Study. Analysis was through structural equation modeling.
Results:
Especially among women, the genetic score was associated with individuals' own relationship experiences. Genetic externalities-linkages of one's genes with a partner's experiences-were also observed. No significant gender variations emerged.
Discussion:
Contrary to conceptions implicit in much of existing genetics literature-which focuses on individuals' own gene-trait associations-the interpersonal environments most crucial to life course and health outcomes are shaped by the genes of all involved actors. Genetic externalities are a central component. Implications for the life course and gene-environment literatures are discussed.
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