Investigating the effect of knowledge hiding behaviors on employee silence and organizational deviant behaviors with the mediating role of psychological contract breach (Case study: Large Taxpayers Unit)

The purpose of this research is to investigate the effect of knowledge hiding behaviors on employees' silence and organizational deviant behaviors with the mediating role of psychological contract breach. This research is applied in terms of purpose and descriptive-surveillance in terms of nature. The statistical population of the current research includes the employees of the large taxpayer’s unit, which consists of 400 people, of which 227 people were determined as a statistical sample by simple random method and power analysis method. In order to collect information, a standard questionnaire was used and the data was analyzed by multivariate analysis based on structural equation modeling with a covariance-based approach in Amos software version 24. The research results show the confirmation of rationalized hiding on defensive silence, evasive hiding on relational silence, rationalized hiding on relational silence, evasive hiding on ineffective silence, rationalized hiding on ineffective silence and defensive silence on organizational deviant behavior, relational silence on organizational deviant behavior and Ineffectual silence on deviant organizational behavior and Also, the results of the mediation analysis show that the construct "psychological contract breach" has a mediating role for all relationships between the dimensions of knowledge-hiding behaviors and the dimensions of silence So that the said mediation process for the causal relationships between "playing dumb" and "defensive silence/ ineffective silence" is complete and partial for the rest of the relationships. In the section of the structural model, among the twenty-one proposed hypotheses, seventeen were confirmed, among which the effect of relational silence on organizational deviant behavior had the highest path coefficient (0.33).