"We are working on non-verbal cues and the emotions are revealed through physical postures, gestures and movements of the body rather than facial or verbal expression," Dr Canamero added.

Body language such as gesture, expression, and posture is a kind of the non-verbal communication.

In this paper, the author sets forth five aspects of non-verbal means of communication including kinetics, proxemics, visual behavior, facial expression, and para-language.