A weekly diary study on the buffering role of social support in the relationship between job insecurity and employee performance

In this article, the authors used a within‐person design to examine the relationship between job insecurity and employee in‐role and extra‐role performance, and the buffering role of time‐varying work‐based support (i.e., supervisor and colleague support) in this relationship. Weekly diary data gathered over the course of three weeks from 56 employees confronted with organizational restructuring and analyzed with a hierarchical linear modeling approach showed that weekly fluctuations in job insecurity negatively predicted week‐level in‐role performance. As predicted, supervisor support moderated the intra‐individual relationship between job insecurity and in‐role performance, so that employees' in‐role performance suffered less from feeling job insecurity during weeks in which they received more support from their supervisor. No relationship between job insecurity and extra‐role performance was observed. This within‐person study contributes to research on job insecurity that has primarily focused on inter‐individual differences in job insecurity and their associations with job performance. Theoretical and practical implications for human resource management are discussed. © 2012 Wiley Periodicals, Inc.