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Rationale Performance on progressive ratio schedules has been proposed as a means of assessing the effects of drugs on the value or “efficacy” of reinforcers. A mathematical model affords a basis for quantifying the effects of drugs on progressive ratio schedule performance. According to this model, the relation between response rate and ratio size is described by a bitonic (inverted-U) function....
Rationale Performance on progressive ratio schedules has been proposed as a means of assessing the effects of drugs on the efficacy of reinforcers. A mathematical model (Killeen PR (1994) Mathematical principles of reinforcement. Behav Brain Sci 17:105–172) affords a basis for quantifying the effects of drugs on progressive ratio schedule performance. The model postulates a bitonic function relating...
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