22 subjects, all of whom met the criteria for a diagnosis of trichotillomania established in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. Subjects receive 22 sessions of group cognitive-behavioral therapy.

22 subjects, all of whom met the criteria for a diagnosis of trichotillomania established in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. Subjects receive 22 sessions of group supportive therapy (control).

Subjects receive 22 sessions of cognitive-behavioral therapy.

The MGH-HPS comprises seven self-report items that are scored on a Likert scale (0-4 points).22 Higher MGH-HPS scores correspond to greater severity of trichotillomania symptoms. Reference: Psychotherapy and Psychosomatic Journal 1995;64:141-5

The BDI consists of 21 items, scored from 0 to 3, higher scores corresponding to greater severity of depression. It is a self-report measure of depression that is widely used in research and in clinical practice. Reference: Archives of General Psychiatry 1961;4:53-63.

The SAS-SR is a self-report scale consisting of 54 questions addressing seven specific areas in relation to the last two weeks25: work; social life and leisure; family relationships; marital relationship; relationships with children; home life; and financial status, each corresponding to a partial score. Reference: Archives of General Psychiatry 1976;33:111-5.