Can You Match These Friends? A Test of Genetic Similarity Theory.
Sandager, Katrina M.
Maves, Stephanie R. A.
Hubert, Sarah L.
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Genetic similarity theory proposes that in selecting social partners, people choose individuals who resemble themselves at the genetic level. In a novel test of this theory, we asked outside raters to view photographs and match pairs of same-sex friends on the basis of their physical appearance.