Drug discrimination under two concurrent fixed-interval fixed-interval schedules

Article Abstract:

Researchers sought to determine the effect of varying reinforcement rates upon the ability of pigeons to perform drug discriminating tasks. Experiments show that under concurrent scheduling, where reinforcement rates differ only by a factor or two, pigeons can perform drug discrimination.

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Accuracy of discrimination, rate of responding, and resistance to change

Article Abstract:

A study was conducted wherein pigeons were trained to respond to a center key produced matching to sample trials according to the same variable-interval 30-s schedule. The results of the study are described.

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Drug discrimination under a concurrent fixed-interval fixed-interval schedule

Article Abstract:

Experiments conducted on the fixed-interval drug discrimination training of three male White Carneau pigeons revealed that concurrent fixed-interval fixed-interval reinforcement results in a response distribution directly related to the reinforcement frequency. Analysis of the data indicates that the regularity of reinforcement in the shorter interval component controlled the response patterns of both components. These results demonstrate the advantages of fixed-interval reinforcement schedules for behavioral pharmacology.

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