Four-month-old Max is easily upset by new sights and sounds.According to Kagan's research,Max probably has __________ than a social baby when faced with novelty.

Question

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Kagan's research suggests that infants who are more easily upset by new stimuli (such as Max) have a higher heart rate and a higher cortisol level. Cortisol is a hormone that is released in response to stress, so a higher level of cortisol suggests greater stress and anxiety in response to novelty.

Four-Month-Old Max Is Easily Upset by New Sights and Sounds