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Quiet: The Power of Introverts in a World That Can ... - WordPress.com

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<strong>in</strong>troverts—just the opposite—but becausethey had nervous systems thatwere unmoved by novelty.<strong>The</strong> more reactive a child’s amygdala,the higher his heart rate is likelyto be, the more widely dilated his eyes,the tighter his vocal cords, the morecortisol (a stress hormone) <strong>in</strong> hissaliva—the more jangled he’s likely t<strong>of</strong>eel when he confronts someth<strong>in</strong>g newand stimulat<strong>in</strong>g. As high-reactive <strong>in</strong>fantsgrow up, they cont<strong>in</strong>ue to confrontthe unknown <strong>in</strong> many differentcontexts, from visit<strong>in</strong>g an amusementpark for the first time to meet<strong>in</strong>g newclassmates on the first day <strong>of</strong> k<strong>in</strong>dergarten.We tend to notice most a child’sreaction to unfamiliar people—howdoes he behave on the first day <strong>of</strong>school? Does she seem uncerta<strong>in</strong> atbirthday parties full <strong>of</strong> kids she doesn’tknow? But what we’re really observ<strong>in</strong>g299/929

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