Discover Magazine: Two heads better than one (if the heads talk and know how competent they are)

http://blogs.discovermagazine.com/notrocketscience/2010/08/26/two-heads-bette…

The failure of groups to outperform their individual members comes from situations where people don’t communicate the evidence for their decision and how reliable that evidence is. Just like the unwittingly incompetent recruits, people who don’t know about their own shortcomings limit the potential of the group.

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