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    Tanskanen, Antti O. Rotkirch, Anna and Danielsbacka, Mirkka 2011. Do grandparents favor granddaughters? Biased grandparental investment in UK. Evolution and Human Behavior, Vol. 32, Issue. 6, p. 407.


Evolutionary psychology's notion of differential grandparental investment and the Dodo Bird Phenomenon: Not everyone can be right

  • Martin Voracek (a1), Ulrich S. Tran (a2) and Maryanne L. Fisher (a3)
  • DOI:
  • Published online: 01 April 2010

Integration of different lines of research concerning grandparental investment appears to be both promising and necessary. However, it must stop short when confronted with incommensurate arguments and hypotheses, either within or between disciplines. Further, some hypotheses have less plausibility and veridicality than others. This point is illustrated with results that conflict previous conclusions from evolutionary psychology about differential grandparental investment.

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W. R. Shadish & R. B. Sweeney (1991) Mediators and moderators in meta-analysis: There's a reason why we don't let dodo birds tell us which psychotherapies should have prizes. Journal of Consulting and Clinical Psychology 59:883–93.

U. S. Tran , M. L. Fisher & M. Voracek (2009) Spousal age differences and sex differences in life expectancy are confounders of matrilateral biases in kin investment. Basic and Applied Social Psychology 31:295303.

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Behavioral and Brain Sciences
  • ISSN: 0140-525X
  • EISSN: 1469-1825
  • URL: /core/journals/behavioral-and-brain-sciences
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