Trichotillomania: Group Cognitive-Behavioral Therapy

Inclusion Criteria: * Patients having been diagnosed with trichotillomania according to Diagnostic and Statistical Manual of Mental Disorders IV (DSM-IV) criteria; being at least 18 years of age; and having had four or more years of schooling. Exclusion Criteria: * Patients that having been diagnosed with trichotillomania according to DSM-IV criteria; having less of 18 years of age; and having less of four years of schooling. * Patients with a history of suicidal ideation, * Patients with any clinical pathology requiring emergency treatment at admission, * Patients with mental retardation or any other central nervous system disorder that severely impairs cognitive function, * those with a psychotic disorder, * those currently being treated with psychotropic drugs, * those with any DSM-IV axis II diagnosis, * those who scored ≤ 2 on the MGH-HPS in an initial screening.