Communication apprehension
Or anxiety although lots of people dread speaking in front of a group Communication apprehension is a more serious problem because it affects a whole category of communication techniques.
People who ten communication or both . For example oral apprehensives may find it extremely difficult talk with others to face or become extremely anxious when they have to use the telephone . As a result they may rely on memos or faxes to convey messages when a phone call would be not only faster but more appropriate.