The Impact of Leader-Member Exchange, Supportive Supervisor Communication, Affective Commitment, and Role Ambiguity on Bank Employees’ Turnover Intentions and Performance
Daniel F. Michael

Abstract
This study examines the mediating roles of supportive supervisor communication (SSC) and role ambiguity in the relationships between leader-member exchange (LMX) and employee job attitudes, turnover intentions, and performance. Specifically, role ambiguity and SSC were expected to mediate the positive LMX- employee affective commitment relationship, and the positive relationships between LMX and task performance, and two dimensions of contextual performance - interpersonal facilitation and job dedication. Next, role ambiguity and SSC were expected to mediate the positive relationship between LMX and affective commitment. Affective commitment was expected to mediate both the SSC-turnover intentions and role ambiguity-turnover intentions relationships. Job dedication was expected to mediate the relationship between SSC and task performance, and partially mediate the relationship between SSC and interpersonal facilitation. Results based on a sample of 237 supervisor-subordinate dyads from the banking industry provided substantial support for the theoretical model.

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