Cocaine's effects on food-reinforcement pecking in pigeons depend on food-deprivation level

Article Abstract:

Food deprivation changed rate-decreasing effects of the the high doses and rate-increasing effects of the low doses, on 4 pigeons. Attainment of 80%deprivation of their laboratory free-feeding weights resulted in pecked keys under a multiple fixed-ratio 30 fixed-interval five minutes schedule of food presentation. Applications of these results for the study of the mechanisms responsible for altering the effects of cocaine due to food deprivation are discussed.

Influence, Behavioral assessment, Starvation, Cocaine

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Effects of morphine on temporal discrimination and color matching: General disruption of stimulus control or selective effects on timing?

Article Abstract:

A multiple schedule is used to assess how drug affect the stimulus control engendered by temporal and color samples during fixed interval. The results suggest that the effects of drugs on behavior maintained by some temporal-discrimination procedures might have little to do with the neuropharmacological correlates of timing performance but disruption of temporal discrimination by some drugs might be a result of a general decrease in stimulus control.

Morphine (Unit Dose), Behavior, Drug abuse, Morphine

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Effects of d-amphetamine and ethanol on variable and repetitive key-peck sequences in pigeons

Article Abstract:

Experimental study is conducted to assess the effects of d-amphetamine and ethanol on reinforced variable and repetitive key-peck sequences in pigeons. It is found that d-amphetamine increased overall sequence variability in the Repeat component, and did not produce systematic stereotype in the key-peck sequences across phases in the Vary component.

United States, Science & research, Industrial organic chemicals, not elsewhere classified, Ethanol, Ethyl Alcohol Manufacturing, Amphetamine Preparations, Alcohol, Response consistency, Alcohol, Denatured, Amphetamines

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