DSM IV CRITERIA FOR SAD
A. A marked and persistent fear of one or more social or performance situations in which the person is exposed to unfamiliar people or to possible scrutiny by others. The individual fears that he or she will act in a way (or show anxiety symptoms) that will be humiliating or embarrassing.
B. Exposure to the feared social situation almost invariably provokes anxiety, which may take the form of situationally bound or situationally predisposed panic attack.
C. The person recognizes that the fear is excessive or unreasonable.
D. The feared social or performance situations are avoided or else are endured with intense anxiety or distress.
E. The avoidance, anxious anticipation, or distress in the feared social or performance situation(s) interferes significantly with the persons normal routine, occupational (academic) functioning, or social activities or relationships, or there is marked distress about having the phobia.