Prosocial behavior is critical for the natural development of an individual as well promoting social relationships. Although this complex results from gratuitous acts occurring between agent and a recipient wealth literature on prosocial has investigated these actions, little known about effects neurobiology underlying them. In study, we used functional magnetic resonance imaging to identify ne...

One important motivation for people behaving prosocially is that they want to avoid negative and obtain positive emotions. In the prosocial behavior literature however, the motivations to avoid negative emotions (e.g., guilt) and to approach positive emotions (e.g., warm glow) are rarely separated, and sometimes even aggregated into a single mood-management construct. The aim of this study was ...

Although helping behaviors can increase the effectiveness of work units, when task interdependence is low, units often develop norms of self-interest that inhibit helping. Little research has explained how these norms can be changed by a work unit member. We present a minority influence framework that specifies how norms can shift in response to a challenger’s consistent modeling, advocating, o...

This study integrates psychological predictors of helping intentions and naturally selected tendencies enhancing inclusive fitness for a more comprehensive understanding of altruism. Psychological mediators of helping intentions, empathic concern and oneness, and psychological processes facilitating kin selection and reciprocal altruism were combined in a structural equation model to predict pa...

There has been much interest in understanding how demographic factors can mediate social evolution in viscous populations. Here, we examine the impact of heterogeneity in patch quality--that is, the availability of reproductive resources for each breeder--upon the evolution of helping and harming behaviors. We find that, owing to a cancellation of relatedness and kin competition effects, the ev...