Demonstrative communication can be in the form of facial expressions, gestures, body language and posture, eye gaze, blinking of eyes, and lips or mouth. Facial expressions are a big part of nonverbal communication because a lot of information can be given away with a smile or frown. Most facial expressions of happiness, fear, anger, surprise, confusion, excitement, and sadness are the same all over the world. Gestures can be waving and pointing and some gestures might have different meanings all over the world. A clenched fist and indicate somebody is angry, a thumbs up and thumbs down can mean approval or disapproval, the “okay” symbol can mean “okay” in the United States but can mean different things in other countries.
Body language and posture can be from leg-crossing, arm-crossing, standing with hands on the hips, clasping the hands behind the back, finger tapping or fidgeting, sitting up straight, and hunching forward. Crossing the arms can indicate that a person is feeling defensive, self-protective, bored, or closed-off. Crossing the legs can mean dislike or discomfort. Standing with the hands placed on the hips can mean a person feels in control or possibly could be a sign of aggressiveness.
Examples of how demonstrative communication can be effective or ineffective