Abstract
A naturally occurring experiment, in which direct supervision of a token economy in a penal system was removed and re-instated, is reported. A retrospective analysis revealed that in the absence of close supervision the use of response cost rose dramatically, both in terms of categories of behaviors for which response costs were levied and in the frequency of their use. The return of direct supervision led to a decreased use and and an end to the growth of categories of behaviors punished.
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