Implicit coordination is attracting attention from the viewpoint of the effciency of team activities. Factors affecting implicit coordination have not been clarified because the empirical research that has been done is insuffcient. This study investigated the effect of team affer-event review and shared mental model on implicit coordination through a laboratory experiment. We conducted the experiment using a coordinating task. 144 students teamed up in pairs, with 72 teams participating. We found that team affer-event review promoted team performance of implicit coordination. However, shared mental model had no relevance to team affer-event review or team performance of implicit coordination. Our findings will help to understand the effciency of team activities.
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