Opposite-Sex Twins and Adolescent Same-Sex Attraction
Peter Shawn Bearman; Hannah Brückner
- Opposite-Sex Twins and Adolescent Same-Sex Attraction
Bearman, Peter Shawn
- Working papers
- Institute for Social and Economic Research and Policy
- Permanent URL:
- Part Number:
- October 2001.
- Institute for Social and Economic Research and Policy, Columbia University
- Publisher Location:
- New York
- 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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