Effects of step size and break-point criterion on progressive-ratio performance

Article Abstract:

Reinforcement schedules are some of the most potent tools in experimental psychology as they both establish and maintain lawful behavioral patterns and also may determine to a large degree how other variables will influence behavior. A study involving pigeons was conducted to describe in detail the effects of step size and break-point criterion on breaking points reached by pigeons on an arithmetically increasing progressive ratio schedule of food delivery. The results are discussed.

Case studies, Animal experimentation, Birds, Animal behavior, Reinforcement (Psychology)

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Cocaine and food deprivation: effects on food-reinforced fixed-ratio performance in pigeons

Article Abstract:

An experiment studied pigeons whose key pecking was controlled by a fixed-ratio 30 schedule of food presentation, whose weights were 80% of free-feeding weights and whose response rates dropped after acute administration of cocaine. The degree of deprivation is suggested to have indirectly affected the degree of tolerance to the response rate-decreasing effect of cocaine. The degree of deprivation seemed to directly affect the rate of tolerance-development.

Animal feeding and feeds

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Tolerance to the effects of cocaine on performance under behavior-correlated reinforcement magnitude

Article Abstract:

Pigeons demonstrated increasing tolerance to cocaine dosage despite the initial effect of cocaine being to increase the amount of food each pigeon obtained. Duration of access to food depended on the number of responses during the interval.

United States, Psychological aspects, Statistical Data Included, Classical conditioning, Conditioning (Psychology)

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