Unfinished tasks foster rumination and impair sleeping - particularly if leaders have high performance expectations.

This study examines the relationship between time pressure and unfinished tasks as work stressors on employee well-being. Relatively little is known about the effect of unfinished tasks on well-being. Specifically, excluding the impact of time pressure, we examined whether the feeling of not having finished the week's tasks fosters perseverative cognitions and impairs sleep. Additionally, we proposed that leader performance expectations moderate these relationships. In more detail, we expected the detrimental effect of unfinished tasks on both rumination and sleep would be enhanced if leader expectations were perceived to be high. In total, 89 employees filled out online diary surveys both before and after the weekend over a 5-week period. Multilevel growth modeling revealed that time pressure and unfinished tasks impacted rumination and sleep on the weekend. Further, our results supported our hypothesis that unfinished tasks explain unique variance in the dependent variables above and beyond the influence of time pressure. Moreover, we found the relationship between unfinished tasks and both rumination and sleep was moderated by leader performance expectations. Our results emphasize the importance of unfinished tasks as a stressor and highlight that leadership, specifically in the form of performance expectations, contributes significantly to the strength of this relationship.