الفهرس 
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Abstract
The current study provides a conceptual framework to examine the effect of perceived workplace incivility from two sources named supervisors and coworkers, on six types of employee silence behavior according to motivations that are deviant, relational, defensive, diffident, ineffectual, and disengaged silence. Pilot testing for the questionnaire was performed to verify its validity and reliability. Then, copies of the final version of the questionnaire were distributed online to demonstrators and lecturer assistants in Mansoura University to collect primary data. Out of the distributed copies, 320 questionnaires were valid. Partial Least Squares (PLS) approach was applied to test the study hypotheses. The Results shows that all study hypotheses were supported. Both supervisor and coworker incivility were found to directly, significantly, and positively impact all six types of employee silence. Finally, theoretical and managerial implications are presented in addition to future research suggestions.