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Employee silence is defined as withholding genuine expression about behavioural, cognitive, and/or affective evaluations of organizational circumstances to people who seem capable of changing the situation.
Pinder, C. C. and Harlos, K. P. (2001). ‘Employee silence: quiescence and acquiescence as responses to perceived injustice’. In Rowland, K. M. and Ferris, G. R. (Eds), Research in Personnel and Human Resources Management, Vol. 20. New York: JAI Press, 331–69.