Journal
SCIENCE
Volume 336, Issue 6079, Pages 360-362Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1216549
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- Max Wertheimer Minerva Center for Cognitive Processes and Human Performance, University of Haifa
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A recent study, using a perceptual task, indicated that two heads were better than one provided that the members could communicate freely, presumably sharing their confidence in their judgments. Capitalizing on recent work on subjective confidence, I replicated this effect in the absence of any dyadic interaction by selecting on each trial the decision of the more confident member of a virtual dyad. However, because subjective confidence monitors the consensuality rather than the accuracy of a decision, when most participants were in error, reliance on the more confident member yielded worse decisions than those of the better individual. Assuming that for each issue group decisions are dominated by the more confident member, these results help specify when groups will be more or less accurate than individuals.
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