Abundant evidence across the behavioral and social sciences suggests that there are
substantial individual differences in pro-social behavior. However, little is known about the …

Engaging in personally costly within-group cooperation benefits one's in-group members but
also impacts other groups by benefiting, neglecting, or harming out-group members, leading …

Prior studies of the effect of group identification on cooperation in social dilemmas have
advanced 2 competing accounts: the goal‐transformation hypothesis, which holds that …

The present study examines a two‐person give‐some dilemma characterized by the conflict
between the pursuit of own benefits (not giving) and collective benefits (giving). The major …

In intergroup conflict, individual cooperation may be directed at strengthening the ingroup,
thus undermining the effectiveness and sustainability of the competing outgroup. Reversely …

The present research examined the effect of respect communicated by fellow group
members on one's willingness to contribute to the group's welfare. Based on the procedural …

Introduction In situations where there is a temptation to behave selfishly even though all
would be made better off by co-operating (ie, a social dilemma), why do people co-operate …

Taking rational choice theory for granted, cooperation in social dilemmas may be seen as
mysterious. In one-shot dilemmas where subjects unknown to one another interact and …

How does lacking vs. possessing power in a social exchange affect people's trust in their
exchange partner? An answer to this question has broad implications for a number of …

We observed the behaviors of the same people across five games–two prisoner's dilemma
games, a trust game (in which the subject took on the role of both truster and trustee), a …