There are 50 or so different types of human smiles. By analyzing the movements of over 80 facial muscles involved in smiling, researchers can tell when a smile is true. Look for the crinkle in the skin at the middle, outside corner of the eyes and if it is not there, the smile is probably fake. Bodily cues are the most reliable of all nonverbal signals of deception . This is because a person generally has less conscious control over these than other signals.
Vocal cues can predict deception .
Space is important . Personal space is needed and if it is invaded intentionally and at times by oversight can cause an individual to feel uncomfortable or threatened. Studies have shown that individuals that do not respect others space are less popular and often rejected by others. Gestures communicate . Hand signals can communicate without the use of any speech.