Article1993

The common knowledge effect: Information sharing and group judgment.

545 citations0/0 files storedJournal of Personality and Social Psychology

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Social and Intergroup Psychology Decision-Making and Behavioral Economics Team Dynamics and Performance

Abstract

The hypothesis that the influence of an item of information on a group judgment is directly related to the number of group members who hold that information before group discussion was tested. Three-member groups read short descriptions of students and were asked to make individual and then group consensus judgments about those students' grades in the course. Information held by all members before group discussion had more influence on the group judgments than information held by only 1 member. However, no erect of information distribution was found when controlling for member judgments, suggesting that the impact of the information, and hence the erects of distribution across members, was mediated by its impact on individual-member prediscussion judgments

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References

1955A study of normative and informational social influences upon individual judgment.1956Perception and the Representative Design of Psychological Experiments 1985Pooling of unshared information in group decision making: Biased information sampling during discussion.1971Comparison of Bayesian and regression approaches to the study of information processing in judgment 1976The group polarization phenomenon.1982Group versus individual performance: Are N + 1 heads better than one?1984Causes and effects of causal attribution.1992Discovery of hidden profiles by decision-making groups: Solving a problem versus making a judgment.

Cited by

2011The focus groups in social research: advantages and disadvantages 2000Maintaining Cultural Stereotypes in the Serial Reproduction of Narratives 1999Mutual enhancement: Toward an understanding of the collective preference for shared information.2002Blackwell Handbook of Social Psychology: Group Process 1999Socially Shared Cognition, Affect, and Behavior: A Review and Integration 2000

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