While previous research suggests that employees rarely believe organization
s keep all of the commitments made to them, only in some cases do employees
perceive these unfulfilled commitments as psychological contract violation
s and make active attempts to "get even" with their employers for the betra
yal. This paper presents a discrepancy model for understanding when employe
es will perceive unfulfilled commitments as psychological contract violatio
ns and for understanding when employees will respond in a hostile manner to
those violations. Among other factors, the sources of employees' expectati
ons, the specific contract elements on which discrepancies occur, and the m
agnitude and timing of the unfulfilled commitments are all posited as impor
tant contributors to perceptions of psychological contract violations. Then
, individual differences, organizational practices, and labor market factor
s are examined as important moderators of how strongly employees respond to
perceived psychological contract violations. The article concludes with di
rections for future theoretical and empirical research on psychological con
tract violations and employees' reactions to them.