Second-to-Fourth Digit Ratio Has a Non-Monotonic Impact on Altruism

@inproceedings{BraasGarza2013SecondtoFourthDR,
  title={Second-to-Fourth Digit Ratio Has a Non-Monotonic Impact on Altruism},
  author={Pablo Bra{\~n}as-Garza and Jarom{\'i}r Kov{\'a}r{\'i}k and Levent Neyse},
  booktitle={PloS one},
  year={2013}
}
Gene-culture co-evolution emphasizes the joint role of culture and genes for the emergence of altruistic and cooperative behaviors and behavioral genetics provides estimates of their relative importance. However, these approaches cannot assess which biological traits determine altruism or how. We analyze the association between altruism in adults and the exposure to prenatal sex hormones, using the second-to-fourth digit ratio. We find an inverted U-shaped relation for left and right hands… CONTINUE READING
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