The more extroverted the student, the higher their peers rated their expected influence and status.

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As a result of a stricter upbringing, for example, firstborn children tend to be more extroverted and confident, while second-born kids are more rebellious and open to new experiences, he says.

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Grant predicted that extroverts, contrary to popular lore, would not bury other personality types when it came to closing sales but rather, ambiverts, people who are more or less equal parts extroverted and introverted would perform best.

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Hyperpolyglots are more likely to be introverted than extroverted, which may come as a surprise to some.

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