sentences:  Receivers make eye contact about 70–75 percent of the time, with each contact averaging 7.8 seconds.Gestures are among the most culture-specific forms of nonverbal communication, and may lead to misinterpretation.Involuntary self-touching, such as touching the face, scratching, gripping the hands together or putting the hands in (or near) the mouth, occur when people experience intense emotions such as depression, elation or extreme anxiety.