Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"fixed ratio schedule"”.
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The Effects of Manipulating One Requirement of a Conjunctive Schedule on Responding in the Pigeon
… the effects of systematically increasing the ratio requirement of a conjunctive fixed-interval fixed-ratio schedule on responding during the fixed interval. Procedure. Three experimentally-naive homing pigeons initially trained to peck a red response key on a fixed-interval schedule (FI 180 …
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Topographical analysis of reinforcement produced variability: Generalizations across settings and contingencies.
… contact with the object would be reinforced on a fixed ratio schedule) and the VAR contingencies (where only the novel responses per trial would be reinforced). The ANY contingency produced stereotyped responding of behavior with all objects. When one of the dog-object interactions was changed to …
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Effects of Ventromedial Hypothalamic Lesions on Food-Reinforced Fixed Ratio Responding
… relative to controls in lever pressing on a fixed ratio schedule. This effect was also seen in rats which had extensive pretraining on the fixed ratio task. Nonpretrained rats with lesions made with platinum electrodes showed a smaller, more variable deficit. However, rats with both platinum …
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Effects of blockade of muscarinic receptors in the ventral tegmental area : attenuation of cocaine reward, but enhancement of locomotor activity and dopamine overflow in the nucleus accumbens
… intravenous cocaine self-administered on either fixed ratio or progressive ratio schedules of reinforcement. Low doses of atropine sulphate, the lipophilic form of the drug, produced a compensatory increase in cocaine intake while the administration of higher doses of atropine sulphate …
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Food preferences and demand in the brushtail possum (Trichosurus vulpecula)
… foods were measured under concurrent progressive-ratio (PR) and fixed-ratio (FR) schedules of reinforcement. In Experiment 3, the same six food types were used and every possible food pair (30 pairs in total) was presented to six possums in concurrent PR and FR 30 schedules. Exponential models of …