Employing a recently developed behavior rating scale (BRS), it was found that the factors for aggressivity and for hyperactivity clearly differentiated among children in an outpatient psychiatric clinic, in a special school, and in public schools. In addition, significant improvement was shown on both factors after drug treatment of the psychiatric group. The authors concluded that the BRS is useful as a measure of deviant behavior as well as for assessing improvement following drug therapy.Abstract Teaser