It is frequently believed that autism is characterized by a lack of social or emotional reciprocity. In this article, I question that assumption by demonstrating how many professionals-researchers and clinicians-and likewise many parents, have neglected the true meaning of reciprocity. Reciprocity is "a relation of mutual dependence or action or influence," or "a mode of exchange in which trans...

From the perspective of reciprocal altruism, we examined the role of reciprocity in the close relationships of people inflicted with a spinal cord injury (SCI) (n = 70). We focused on the help receiver rather than on the help giver. Participants perceived more reciprocity in relationships with friends than in relationships with the partner and with family members. In these last relationships, p...

We define social reciprocity as the act of demonstrating one’s disapproval, at some personal cost, for the violation of widely-held norms (e.g., don’t free ride). Social reciprocity differs from standard notions of reciprocity because social reciprocators intervene whenever a norm is violated and do not condition intervention on potential future payoffs, revenge, or altruism. Instead, we posit ...

The authors investigated the effects of expected reciprocity on knowledge sharing, as moderated by team and individual variables. Data (n = 84) was collected in an experimental study from undergraduate business student participants. Effects of expected reciprocity on knowledge sharing depended on the levels of individual competence, positive team attitudes, functional diversity and demographic ...

Recent evidence highlights the importance of social norms in many economic relations. However, many of these relationships are long-term and provide repeated game incentives for performance. We experimentally investigate interaction effects of reciprocity and repeated game incentives in two treatments (one-shot and repeated) of a gift-exchange game. In both treatments we observe reciprocity, wh...

More than any other species, humans form social ties to individuals who are neither kin nor mates, and these ties tend to be with similar people. Here, we show that this similarity extends to genotypes. Across the whole genome, friends' genotypes at the single nucleotide polymorphism level tend to be positively correlated (homophilic). In fact, the increase in similarity relative to strangers i...

It is easy to slip into sentimental platitudes when talking about friendship. Great writers such as Cicero and Montaigne avoided this pitfall, but mainly by describing not what friendship is, but what it ought to be. The close connection of intimate comradeship Wlth mental health is being increasingly recognised. A few aspects of this connection will here be outlined. In the first place, the ty...