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The present study attempted to examine changes in parental reinforcement value as a function of parental use of timeout and differential attention. Subjects were two children classified by their parents as highly oppositional to parental requests or commands. Results showed that the children's oppositional behavior varied predictably with the presence and absence of parental use of timeout and differential attention. As expected, parental reinforcement value for the children was higher during treatment periods than during baseline periods.
Robert G. Wahler (1969) studied this question.