Going that extra mile: individuals travel further to maintain face-to-face contact with highly related kin than with less related kin.

ABSTRACT: The theory of inclusive fitness has transformed our understanding of cooperation and altruism. However, the proximate psychological underpinnings of altruism are less well understood, and it has been argued that emotional closeness mediates the relationship between genetic relatedness and altruism. In this study, we use a real-life costly behaviour (travel time) to dissociate the effects of genetic relatedness from emotional closeness. Participants travelled further to see more closely related kin, as compared to more distantly related kin. For distantly related kin, the level of emotional closeness mediated this relationship--when emotional closeness was controlled for, there was no effect of genetic relatedness on travel time. However, participants were willing to travel further to visit

SUBMITTER: Pollet TV 

PROVIDER: S-EPMC3556071 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature