Kinship and altruism: a cross-cultural experimental study.

  title={Kinship and altruism: a cross-cultural experimental study.},
  author={Elainie Alenk{\ae}r Madsen and Richard J. Tunney and George Fieldman and Henry Plotkin and Robin I. M. Dunbar and Jeanne M. Richardson and David McFarland},
  journal={British journal of psychology},
  volume={98 Pt 2},
Humans are characterized by an unusual level of prosociality. Despite this, considerable indirect evidence suggests that biological kinship plays an important role in altruistic behaviour. All previous reports of the influence of kin selection on human altruism have, however, used correlational (rather than experimental) designs, or imposed only a hypothetical or negligible time cost on participants. Since these research designs fail either to control for confounding variables or to meet the… 

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