In this video I discuss how emotions are more than just internal states and that we express them to others and also recognize the expressions of others. We communicate our emotional state to others in a number of ways, including through our speech, tone of voice, eye gaze, posture, and facial expressions. Darwin proposed that emotional expression was universal, and later research by Paul Ekman and others has supported this view. I also describe the facial-feedback hypothesis, which suggests that the expression of an emotion can also serve to strengthen an emotional state.

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