Investigating the Moderating Effects of Leader–Member Exchange in the Psychological Contract Breach–Employee Performance Relationship: A Test of Two Competing Perspectives

Leader–member exchange (LMX) has been characterized as a form of social support capable of buffering the effects of negative work experiences. However, employees with high‐quality relationships with leaders in the organization may have stronger negative reactions when psychological contracts are breached. Thus, while a social support perspective would suggest that LMX minimizes the adverse impact of psychological contract breach on employee performance, a betrayal perspective proposes that high LMX would aggravate the negative effects. Using cross‐sectional and longitudinal research designs, results across three samples provided support for the betrayal perspective. That is, breach had a stronger negative relationship with organizational citizenship behaviours and in‐role performance under conditions of high LMX. Implications of these results and future research directions are discussed.