In one study, researchers looked at introverts and extroverts who won gambling contests, and the extroverted winners had more activity in the reward areas of their brains than the introverted victors. I’m sure the introverts loved winning too. But the evidence suggests that their brains’ reward networks were just a little less activated, so they felt a bit more mellow about the experience. Other studies have found that extroverts drive more rashly and get into more car accidents than introverts do!
