“…An extensive literature exists on the prevention, treatment and management of behavior disorders in persons with mental retardation ( e g , Cipani, 1989;Hile & Vatterott, 1991;Matson & Gorman-Smith, 1986;Mulick & Schroeder, 1980;Schroeder, Mulick, & Schroeder, 1979;Spreat & Lipinski, 1986). Treatment of severe behavior disorders, however, remains difficult, and the method of treatment currently is controversial (e.g., Butterfield, 1989;Matson & Taras, 1989;Mulick, 1990).…”