A reinforcement procedure designed to facilitate litter removal in an amusement park was evaluated in this study. A constantly changing population of vacationing children of varying ages was offered complimentary tickets for amusement park rides contingent upon collection of bags of litter in the park. A cost and effect analysis showed that this particular reinforcement program for litter removal was approximately two-and-one-half times as effective at about the same cost as traditional salaried maintenance.
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Casey et al. (1977) studied this question.
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