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A series of studies examined the role of social influence processes in group brainstorming. Two studies with pairs and 1 with groups of 4 revealed that the performance of participants in interactive groups is more similar than the performance of those in nominal groups. A 4th study demonstrated that performance levels in an initial group session predicted performance on a different problem 2 sessions later. In a 5th study it was found that the productivity gap between an interactive and nominal group could be eliminated by giving interactive group members a performance standard comparable with the typical performance of nominal groups
Paulus et al. (Thu,) studied this question.
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