Purpose The purpose of this paper is to examine affective events theory (AET) by testing the mediating effect of employees’ positive affect at work in the relationships of leaders’ use of positive humor with employees’ work engagement, job performance, and organizational citizenship behaviors (OCBs); and the moderating effect of transformational leadership style on the relationship between leaders’ use of positive humor and subordinate’s positive affect at work. Design/methodology/approach Data were obtained from 235 full-time employees working for a large information technology and business consulting corporation. Moderated mediation (Hayes, 2013) was performed to test the proposed model. Findings Leaders’ positive humor was related to creation of subordinates’ positive emotions at work and work engagement. Positive emotions at work did not mediate between leaders’ humor and performance or OCBs. In addition, leaders’ use of transformational leadership style made the relationship between leaders’ positive humor and employees’ positive emotions at work stronger. Research limitations/implications This study provides evidence of the positive relationship of leaders’ positive humor with employees’ positive emotions at work and work engagement. Such knowledge may help to inform the training workshops in humor employed by practitioners and potentially create a more enjoyable and fun workplace, which can lead to greater employee engagement. Originality/value AET helps explain effects of leader humor, but the effects of are complex. Leader’s use of even positive humor is most likely to have favorable effects mainly depending on their leadership style (transformational) and if their humor successfully leads to positive emotions among employees.

Personality traits are often theorized to affect team performance by predisposing members to perform individual-level behaviors. Yet, member personality traits may also affect team performance by creating contextual influences on member behaviors. As such, the purpose of the present study was to examine the effect of team personality composition on individual-level performance using hierarchical linear modeling. A range of effects for team-level elevation were observed, but few effects emerged for team-level heterogeneity. Main effects from elevation in Extraversion and Openness to Experience were consistently observed across analyses. The main effects from team elevation in Conscientiousness and Agreeableness, however, were only observed prior to controlling for individual-level trait scores or when using a group-mean centering method for individual-level trait scores. In addition, elevation in Conscientiousness and heterogeneity in Emotional Stability moderated the relationships between individual trait scores and performance, such that individual-level relations were stronger when team elevation was higher (Conscientiousness) and heterogeneity was lower (Emotional Stability). These findings provide evidence that team member personality can influence performance through contextual phenomena.

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