Nonverbal communication by means of facial expressions, eye behavior, gestures, posture, and the like; often thought to be involuntary.
Deliberate, usually culturally influenced, nonverbal communication using the body through facial expressions, gestures, dance, mime, etc.
A person's internal state of being and involuntary physiological response to an object or a situation, based on or tied to physical state and sensory data.
A reaction by a non-human organism with behavioral and physiological elements similar to a person's response.