It is assumed here that the most effective way of reducing the rate of deviant child behavior is to alter the reinforcing contingencies supplied by the social agents who live with the child. The immediate focus for the intervention program is upon the social environment in which the child lives, because it is the parents, siblings, peers, and teachers who provide the reinforcers which maintain these behaviors. Data are presented in this report from observations made for six children demonstrating the effect of direct intervention in the home and in the school. The sample consisted of boys aged four-12, with multiple problems of the kind typically referred for outpatient treatment. Observations made during baseline, intervention, and follow-up underline the feasibility of training parents, siblings, peers, and teachers to alter the behavior of the identified deviant child. (BP)