The I's have it; the teams do not -- unless you add women
A counterpoint on the same site, though, had an interesting finding. Adding women to the team improves results:
Professors Woolley and Malone, along with Christopher Chabris, Sandy Pentland, and Nada Hashmi, gave subjects aged 18 to 60 standard intelligence tests and assigned them randomly to teams. Each team was asked to complete several tasks—including brainstorming, decision making, and visual puzzles—and to solve one complex problem. Teams were given intelligence scores based on their performance. Though the teams that had members with higher IQs didn’t earn much higher scores, those that had more women did.[my emphasis]Though the professors admit this is a preliminary finding, they confirm, "so far, the data show, the more women, the better."
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