Louis M. Johnson

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Previous experiments examining the effects of adding a tandem fixed-ratio response requirement on fixed-interval schedule performance have reported inconsistent results. One variable that may account for such inconsistencies is the baseline response rate in the fixed-interval condition. This possibility was investigated in the present study. Rats were given(More)
The effects of schedule history and the availability of an adjunctive response (polydipsia) on fixed-interval schedule performance were investigated. Two rats first pressed levers under a schedule of food reinforcement with an interresponse time greater than 11 s, and 2 others responded under a fixed-ratio 40 schedule. All 4 were then exposed to a(More)
The study was designed to test the relations among gender, adult-provided activity structure, and social behavior for children in middle childhood. Adult-provided structure was defined as verbally presented rules, guidelines, suggestions, and modeling. Children aged 7-11 years attended a 1-week summer day camp in which activities characterized by high or(More)
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