Infants' Emotional Expressions in Response to Social and Non-Social Stimuli‪.‬

Introduction and Theoretical Basis for Research Emotional expressions are a way of communicating one's feelings to others. Facial expressions are one way of communicating internal feelings. Whereas an individual's smile indicates a feeling of joy or happiness, a frown is considered an expression of sadness. Another mode of emotional expression involves speech. The tone of someone's voice may convey a feeling of anger or excitement. Gestures and bodily postures represent a third way of communicating feelings. When someone clenches a fist, it usually indicates anger. A sad person often holds their head and eyes in a downward position. Someone who is excited might jump up and down.