The apprehension of unpleasantness which arises when the stutterer consciously perceives situations
which lead him to anticipate difficulty talking. This fear
of difficulty may be and often is intense. It can and sometimes does temporarily paralyze thought and action. Stuttering is usually relatively proportionate to the amount of fear
present. Stuttering fears
may be of persons, of sounds or words, or of situations
such as talking in groups or on the telephone, etc.