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Lieberman, Tooby , & Cosmides (2007)

Lieberman, Tooby , & Cosmides (2007). Humans interact closely with relatives In-breeding depression K in-selection Humans should be able to: Show appropriate altruism Detect genetic similarity in mates . Mattson. Sibling Detection. Maternal P erinatal Association (MPA)

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Lieberman, Tooby , & Cosmides (2007)

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  1. Lieberman, Tooby, & Cosmides (2007) • Humans interact closely with relatives • In-breeding depression • Kin-selection • Humans should be able to: • Show appropriate altruism • Detect genetic similarity in mates Mattson

  2. Sibling Detection • Maternal Perinatal Association (MPA) • Co-residence and other factors Mattson

  3. Co-residence and MPA • N=154 at lowest • Self-Report • Men vs. Women • Notable changein effect size Mattson

  4. Co-residence and MPA • Effect of MPA vs. Co-residence on • Altruism • Incest • After controlling for MPA Mattson

  5. Alternatives and Conclusions • Data Artifact? • Moral opposition linked to opposite sex co-residence • Early Imprinting? • Likely due to MPA • Beliefs? • Not predictive compared to co-residence • Correlational • Kinship Index • Hierarchy of Cues Mattson

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