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Opposite-Sex Twins and Adolescent Same-Sex Attraction

Bearman, Peter Shawn; Brückner, Hannah

The authors consider social, genetic, evolutionary, and hormonal transfer hypotheses for same-sex romantic preferences of adolescent (N=5,552) sibling pairs drawn from a nationally representative sample. They show that male but not female opposite-sex twins disproportionately report same-sex attraction; and that the pattern of concordance of same-sex preference among siblings is inconsistent with a simple genetic influence model. Their results provide substantial support for the role of social influences, reject the hormone transfer model, reject a speculative evolutionary theory, and are consistent with a general model that allows for genetic expression of same-sex attraction under specific, highly circumscribed, social conditions.

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More About This Work

Academic Units
Institute for Social and Economic Research and Policy
Publisher
Institute for Social and Economic Research and Policy, Columbia University
Series
ISERP Working Papers, 01-04
Published Here
August 23, 2010

Notes

October 2001.

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