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Behavioral Contrast In Competitive And Non-Competitive Environments, James Dougan, Frances Mcsweeney, Valeri Farmer-Dougan
Behavioral Contrast In Competitive And Non-Competitive Environments, James Dougan, Frances Mcsweeney, Valeri Farmer-Dougan
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Three experiments examined the effects of opportunities for an alternative response (drinking) on positive behavioral contrast of rats' food-reinforced bar pressing. In both Experiments I and 2 the baseline multiple variable-interval schedules were rich (variable interval 10-s), and contrast was examined both with and without a water bottle present. In Experiment 1, the rats were not water deprived. When one component of the multiple schedule was changed to extinction, the rate of bar pressing increased in the constant component (positive behavioral contrast). The magnitude of contrast was larger when the bottle was absent than when it was present, as predicted …
Some Parameters Of Behavioral Contrast And Allocation Of Interim Behavior In Rats, James Dougan, Frances Mcsweeney, Valeri Farmer
Some Parameters Of Behavioral Contrast And Allocation Of Interim Behavior In Rats, James Dougan, Frances Mcsweeney, Valeri Farmer
Scholarship
Two experiments examined the effects of baseline reinforcement rate and component duration on behavioral contrast and on re-allocation of interim behavior in rats. Positive behavioral contrast occurred during multiple variable-interval 10-second extinction (VI 10 EXT) after a multiple VI 10 VI 10 baseline condition, but not during multiple VI 60 EXT following multiple VI 60 VI 60 baseline. Component duration had no significant effect on contrast. These results differed from those found in studies of pigeons' key pecking. Contrast was accompanied by an increased rate of drinking in the changed component, but drinking in the constant component did not decrease. …