In humans, one of the means of communication is the posture of the body, in addition to facial expressions, personal distances, gestures and body movements. Posture conveys information about: 1  Interpersonal relations. 2  Personality traits such as confidence, submissiveness, and openness.he term posture is also used to refer to the appearance of the body. In psychology, there are several concepts involving the appearance of the permanent characteristics of individuals. Some habitual positions may also reflect stable characteristics of an individual.