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This research examines mood as a collective property of work groups. We argue that work group members experience group moods when they can detect and display mood information through observable behavioral expressions. To test the hypothesis that work group moods are manifested behaviorally, we developed an observational instrument and compared observers' reports of work group mood with self-reported measures from 70 work groups. As predicted, groups converged for eight distinct mood categories, and observers' reports of work group mood were consistent with groups' aggregated self-reported values. Convergence in members' moods was positively associated with task and social interdependence, membership stability, and mood regulation norms. Theoretical and practical implications of work group mood are discussed.
Bartel et al. (Thu,) studied this question.