Positive mood at work (as an affective state) was hypothesized to be significantly and positively associated with the performance of both extrarole and role-prescribed prosocial organizational behaviors. Moreover, positive mood was hypothesized to have effects on prosocial behavior above and beyond the effects of fairness cognitions. Conversely, positive mood as a trait (\£., positive affectivity) was expected to be unrelated to either form of prosocial behavior. Finally, the form of

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... ibed prosocial behavior investigated, customer-service behavior or helpful behavior directed at customers, was hypothesized to be positively associated with sales performance. These hypotheses were tested with a sample of 221 salespeople. All of the hypotheses were supported. Implications of these results and directions for future research are discussed.