Why and when do motives matter? An integrative model of motives, role cognitions, and social support as predictors of OCB

• We explicate and demonstrate why and when motives matter as predictors of OCB.
• Two multiple source field studies support our predictions.
• Moderated-mediation results shed light on motives–OCB relationships.

We extend prior thinking about citizenship behavior by integrating employee motives, social support, and role cognitions as predictors of organizational citizenship behavior (OCB). Drawing on trait activation and situated self theories, we provide insights into why and when motives predict OCB using multi-source data from two field samples. In Study 1, we demonstrate that the quality of social support functions as a boundary condition that qualifies relations of motives with OCB. In Study 2, we introduce role cognitions as a proximal motivational factor that mediates the motives by social support interactions with OCB. Our results support the hypothesized moderated mediated model and enhance understanding of OCB by integrating the OCB motive and role cognition literatures, which to date have developed separately. As our results demonstrate, role cognitions, which are domain-specific felt obligations to perform OCB, mediate relations of more distal predispositions to perform OCB with helping and voice citizenship behaviors.