“…Intervent., 13, 157±168 (1998) techniques that may be classi®ed according to two general types: reinforcement and punishment (Ball, 1993;Scherzinger et al, 1993). Punishments frequently employed are a loss of earned reinforcers (see, e.g., Ayllon & Azrin, 1965) or restitution (an overcorrection procedure, for reviews see MacKenzie-Keating & McDonald, 1990;Ollendick & Matson, 1978), in which an individual is required to restore the environment disrupted by an aggressive outburst (see, e.g., Foxx & Azrin, 1972). Procedures employing reinforcement have included dierential reinforcement of other behavior (DRO; S. Dietz, 1985), whereby a reinforcement is delivered contingent upon the absence of the aggressive behavior (see, e.g., Vukelich & Hake, 1971), and dierential reinforcement of incompatible behavior (DRI; D. Dietz, 1985), a procedure involving reinforcement of a behavior that is topographically incompatible with an unwanted behavior (see, e.g., Tarpley & Schroeder, 1979).…”