What is the relationship between individual members' organizational citizenship behaviours (OCB) and team-level performance? Using a social cognitive perspective, the current study proposes that the relationship is mediated by a team's cohesion and collective efficacy. We collected data at two points in time from three sources with a sample of 462 salespersons representing 62 teams (62 branches) of a financial institute in Taiwan. The results support the theoretical argument that OCB positively influences organizational performance. Furthermore, group cohesion and collective efficacy fully mediated the direct effects of OCB towards individuals and the organization on team performance. Theoretical and practical implications of the results are discussed.
