The presence of a spouse helps someone calm down faster after a stressful event. Researchers saw the calming effect in real time by using infrared light to measure pupil width, a signal of the body's physiological stress response levels.

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The presence of a spouse helps someone calm down faster after a stressful event. Researchers saw the calming effect in real time by using infrared light to measure pupil width, a signal of the body's physiological stress response levels.