Linking justice perceptions, workplace relationship quality and job performance: The differential roles of vertical and horizontal workplace relationships

Due to decentralization, flat organizational structures and prevalence of team work, employees interact more frequently and intensively within horizontal relationships with coworkers than within vertical relationships with supervisors. The present study contributes to a more complete understanding of antecedents and outcomes of local, interpersonal workplace relationships by simultaneously investigating employee–supervisor and employee–coworker relationships. Drawing on organizational justice theory and social exchange theory as well as data collected from 571 employees at two points in time, this study explores how justice perceptions affect social exchange relationships with supervisors and coworkers, and identifies mechanisms through which these, in turn, enhance employee job performance. Results suggest that informational and interpersonal justice differentially affect the quality of employee–supervisor and employee–coworker relationships, underlining the relevance of considering both supervisors and coworkers as sources of justice. Moreover, the findings indicate that employee–supervisor and employee–coworker relationships contribute to job performance, but through distinct paths. Job satisfaction mediates the link between both social exchange relationships and job performance, while quality of employee–coworker relationships further enhances job performance through employees’ motivation to engage in learning and knowledge sharing.