Prosocial behaviour, inclusion and exclusion: why and when do we behave prosocially? / Comportamiento prosocial, inclusión y exclusión: ¿cuándo y por qué adoptamos comportamientos prosociales?

Abstract Two experiments analysed the influence of inclusion versus exclusion on prosocial behaviour. In Study 1, evidence for the social reconnection hypothesis was found. In Study 2, a cross-over interactive effect is demonstrated: excluded individuals tended to be more prosocial when their competence was affected than when their popularity was affected. However, included people were more prosocial than excluded people when their popularity was affected, but they were less prosocial when their competence was highlighted. Besides, Study 2 has shown that affiliation motivation mediates the effect of exclusion on prosocial behaviour, and thus: (1) excluded individuals endorse lower levels of affiliation motivation with their rejecters than included individuals do with individuals who have included them; and (2) individuals with higher levels of affiliation motivation engage in higher prosocial behaviour levels when the behaviour is oriented to people with whom the chance to reconnect exists, but not when it is oriented to people with whom there is no possibility for future affiliation.