Facial Expressions - Study Body, language
For example, knowing if a stranger's smile is genuine and whether that person can be trusted, warns you whether you should evade or not.". They often occur as fast as 1/15 to 1/25 of a second.
This type of posture can be an indicator of hostility, unfriendliness, and anxiety. Public distance 12 to 25 feet: Physical distance at this level is often used in public speaking situations.
A thumbs up and thumbs down are often used as gestures of approval and disapproval. Understanding body language is important, but it is also essential to pay attention to other cues such as context.