Journal article

Darwinian grandparenting: Preferential investment in more certain kin

SM Laham, K Gonsalkorale, W von Hippel

PERSONALITY AND SOCIAL PSYCHOLOGY BULLETIN | SAGE PUBLICATIONS INC | Published : 2005

Abstract

Studies on grandparental investment have revealed that mothers' fathers are emotionally closer to their grandchildren than are fathers' mothers. In the current study, it was hypothesized that this difference is caused by the fact that fathers' mothers often have the potential to invest in genetically more certain kin (children through their daughters). To test this hypothesis, 787 participants rated their emotional closeness and exposure to their grandparents and indicated whether they had cousins through paternal and maternal aunts and uncles. Results indicated that participants felt closer to mothers' fathers than fathers' mothers only when alternate investment outlets for fathers' mothers..

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