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In over 60 years of research, there have been very few demonstrations that working in a small collaborative group yields cognitive outcomes that cannot be matched or exceeded by the most competent member of the group (Barron, 1992; Hastie, 1983, Hill, 1982). This finding extends to tasks as diverse as brainstorming (Dunnette, Campbell, & Jaastad, 1963), writing (Fox & Lorge, 1962), problem solving (Kelly & Thibaut, 1969), rope pulling, and rule induction (Laughlin & Futoran, 198...
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