Anxiety Anxiety has been discussed and studied as a concept and psychological phenomenon for a long time. According to The American Heritage College Dictionary (1993), anxiety is “a state of intense, often disabling apprehension, uncertainty, and fear caused by the anticipating of something threatening” (p.61). Spielberger defines anxiety as “the subjective feeling of tension, apprehension, nervousness and worry associated with an arousal of the autonomic nervous system.” (Spielberger 1966a, p.16). Spielberger further mainly divided anxiety into two kinds. One is trait anxiety, which is more permanent predisposition to be anxious. The other is state anxiety, which is experienced with some particular events (Speiberger, 1966 a).