And even in college and grad school, we give (and get) points for extroversion.

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As he predicted, people whose scores put them in between extreme extroversion and introversion turned out to be the best salespeople.

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And passionate, the attribute that people most associate with extroversion, is actually about depth of commitment: you can be quietly, deeply passionate.

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Stillwell says companies are already using these kinds of machine-learning models to make connections, though the companies may not know that they're measuring IQ or extroversion.

CNN: Heather Kelly,

Each possessed a different level of extroversion and friendliness.

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According to the survey, the students at the top of the social hierarchy they were the most "powerful" and respected were also the most considerate and outgoing, and scored highest on measures of agreeableness and extroversion.

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