“…Some investigators have reported that parental treatment of one child at home resulted in positive changes in untreated siblings (Ar-435 1981, 1430 (WINTER 198 1) nold, Levine, & Patterson, 1975;Lavigueur, Peterson, Sheese, & Peterson, 1973;Resick, Forehand, & McWhorter, 1976;Humphreys, Forehand, McMahon, & Roberts, Note 1). Others have described increases in desirable classroom behavior of nontreated students when a teacher administered reinforcers to a target child (Broden, Bruce, Mitchell, Carter, & Hall, 1970;Drabman & Lahey, 1974;Kazdin, 1973Kazdin, , 1977Okovita & Bucher, 1976;Strain et al, 1976;Strain, Shores, & Timm, 1977;Strain & Timm, 1974).…”