{"id":24343,"date":"2021-01-27T15:59:00","date_gmt":"2021-01-27T19:59:00","guid":{"rendered":"https:\/\/www.shortform.com\/blog\/?p=24343"},"modified":"2021-01-29T17:45:23","modified_gmt":"2021-01-29T21:45:23","slug":"jerome-kagan","status":"publish","type":"post","link":"https:\/\/www.shortform.com\/blog\/jerome-kagan\/","title":{"rendered":"Jerome Kagan: How Babies Become Introverts"},"content":{"rendered":"\n

Who is Jerome Kagan? How did his longitudinal research on babies show how introversion and extroversion can be identified at an early age?<\/p>\n\n\n\n

Jerome Kagan is a developmental psychologist that started a multi-year study in 1989. That study showed that reactivity as an infant was a predictor of temperament later in life.<\/p>\n\n\n\n

Keep reading to find out more about Jerome Kagan and his research.<\/p>\n\n\n\n\n\n\n\n

Jerome Kagan: High Reactiv<\/strong>es and Introversion<\/h2>\n\n\n\n

In 1989, developmental psychologist Jerome Kagan of Harvard began a longitudinal or years-long study of 500 four-month-old babies and was able to tell which ones would turn out to be extroverts and which would be introverts based on innate temperament. <\/p>\n\n\n\n

By introducing stimuli such as voices, popping balloons, or smells, Kagan determined which infants were high reactives (crying and throwing their arms around) and which were low-reactive. Counterintuitively, he predicted the highly reactive babies were likely to be quiet or introverts as teenagers, which turned out to be the case. <\/p>\n\n\n\n

He did further testing of their reactions to new things\u2014for instance, a clown and a woman wearing a gas mask\u2014when the children were two, four, seven, and eleven. Most of the children turned out exactly as Kagan expected: high-reactive children turned out to be introverts while low-reactive children were extroverts.<\/p>\n\n\n\n

Alertness and Sensitivity<\/strong><\/h3>\n\n\n\n

Jerome Kagan also found that highly reactive children are more sensitive to their environment<\/strong>.<\/p>\n\n\n\n

Besides noting the children\u2019s behavioral reactions to strange situations, Jerome Kagan measured their heart rate, blood pressure, and finger temperature, which are controlled by the amygdala region\u2014or emotional control center\u2014of the brain. One function of the amygdala is to detect new or threatening things and trigger a reaction, such as ducking when a ball comes at your head. He found that highly reactive infants\u2019 nervous systems reacted strongly to unfamiliar things while quiet infants\u2019 nervous systems were unaffected.<\/p>\n\n\n\n

As highly reactive children grow, parents and teachers may notice a wary reaction to unfamiliar people or the first day of preschool and may assume a child is shy. But what they\u2019re really reacting to is newness. High reactives are just more sensitive to their environment. One psychologist calls this \u201calert attention\u201d\u2014they notice not only alarming things, but also most things in general. <\/p>\n\n\n\n

Emotion<\/strong><\/h3>\n\n\n\n

High-reactive children also tend to more thoroughly process what they\u2019ve observed and to apply more nuance to everyday experiences.<\/strong> For instance, they may spend a lot of time thinking about others\u2019 actions, considering potential reasons why another child did what he did.<\/p>\n\n\n\n

Jerome Kagan found that highly reactive kids seem to feel emotions more strongly as well<\/strong>\u2014for instance, they feel more intense guilt if they break something than low-reactive children feel. They\u2019ll also concentrate more intensely on something that interests them.<\/p>\n","protected":false},"excerpt":{"rendered":"

Who is Jerome Kagan? How did his longitudinal research on babies show how introversion and extroversion can be identified at an early age? Jerome Kagan is a developmental psychologist that started a multi-year study in 1989. That study showed that reactivity as an infant was a predictor of temperament later in life. Keep reading to find out more about Jerome Kagan and his research.<\/p>\n","protected":false},"author":6,"featured_media":10677,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7,9,160],"tags":[192],"class_list":["post-24343","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lifestyle","category-psychology","category-science","tag-quiet-the-power-of-introverts","","tg-column-two"],"yoast_head":"\nJerome Kagan: How Babies Become Introverts - Shortform Books<\/title>\n<meta name=\"description\" content=\"Can you tell if an infant is an introvert or extrovert? According to Jerome Kagan, yes! 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