RESUMO
While prior research has extensively explored outcomes of family to-work conflict (FWC), our understanding of how FWC may impact employees' negative interpersonal behaviours at work such as workplace incivility is limited. Given the serious implications of workplace incivility, the current study seeks to understand the relationship between FWC and instigated incivility via the mediating role of negative affect. The moderating role of family supportive supervisor behaviours (FSSB) is also investigated. We collected data from 129 full-time employees over three waves with six weeks in between. Results revealed that FWC positively predicted instigated incivility, and negative affect mediated this relationship. In addition, the positive effect of FWC on negative affect as well as the indirect effect of FWC on instigated incivility through negative affect were weaker for individuals experiencing more FSSB, suggesting that family related support from supervisors may attenuate the effect of FWC on employees' negative affect and its indirect effect on instigated incivility via negative affect. Theoretical and practical implications are also discussed.