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

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We gaze reverently at the fMRI scanner,which looks like a gleam<strong>in</strong>g rocketshiply<strong>in</strong>g on its side. Schwartz expla<strong>in</strong>sthat he asks his subjects—whoare <strong>in</strong> their late teens—to lie down withtheir heads <strong>in</strong> the scanner while theylook at photographs <strong>of</strong> faces and themach<strong>in</strong>e tracks how their bra<strong>in</strong>s respond.He’s especially <strong>in</strong>terested <strong>in</strong>activity <strong>in</strong> the amygdala—the samepowerful organ <strong>in</strong>side the bra<strong>in</strong> thatKagan found played such an importantrole <strong>in</strong> shap<strong>in</strong>g some <strong>in</strong>troverts’ and extroverts’personalities.Schwartz is Kagan’s colleague andprotégé, and his work picks up justwhere Kagan’s longitud<strong>in</strong>al studies <strong>of</strong>personality left <strong>of</strong>f. <strong>The</strong> <strong>in</strong>fants Kaganonce categorized as high- and low-reactivehave now grown up, andSchwartz is us<strong>in</strong>g the fMRI mach<strong>in</strong>e topeer <strong>in</strong>side their bra<strong>in</strong>s. Kagan followed337/929

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