Organizations tend to rely on small groups rather than individuals when important decision have to be made, based on the assumption that groups possess a broader range of informational resources and more diversity of insights than individuals. However, research on group decision-making shows that groups often fail to use effectively group members’ unique information. Central in this dissertation is the relationship between distributed information, the way groups process information, and the quality of the group decision. In three experiments, the influence of demographic diversity, dispositional negative affect, and mood on groups’ information elaboration process and groups’ decision quality is studied. Results indicate the following: Groups with distributed information and diverse demographic backgrounds elaborate information more and reach better decisions with a focus on information exchange and integration than without such a focus. Higher dispositional negative affect within a group with distributed information stimulates information elaboration and group decision quality. A negative mood within a group with distributed information only affects information elaboration within a group and groups’ decision quality positively if group members are lower in dispositional distress. In all three single experiments, information elaboration within a group mediates groups’ decision quality. It is concluded that diversity and affect – as disposition as well as mood – are important issues to include in group research and implications for research in organizational behaviour are discussed.

Additional Metadata
Keywords demographic diversity, distributed information, group decision making, information exchange, mood, negative affect
JEL Firm Objectives, Organization, and Behavior (jel L2), Business Administration and Business Economics; Marketing; Accounting (jel M), Business Administration: General (jel M10), Personnel Management (jel M12)
Promotor D.L. van Knippenberg (Daan)
Publisher Erasmus University Rotterdam , Erasmus Research Institute of Management
Sponsor Rotterdam School of Management (RSM) D.L. van Knippenberg I. Bogenrieder D. van Dierendonck B.A. Nijstad
Persistent URL
Series ERIM Ph.D. Series Research in Management
Kooij-de Bode, J.M. (2007, November 2). Distributed Information and Group Decision-Making: Effects of Diversity and Affect (No. EPS-2007-115-ORG). ERIM Ph.D. Series Research in Management. Erasmus Research Institute of Management. Retrieved from