Identity matching-to-sample with olfactory stimuli in rats

Article Abstract:

Rats are trained on an identity match-to-sample procedure with odorants mixed in cups of sand as stimuli to explore the possibility that identity matching may me facilitated in rates if olfactory stimuli are used. It is suggested that generalized matching-to-sample can be observed in rates when olfactory stimuli are used and that multiple-exemplar training may be important for its emergence.

Stimuli (Psychology), Olfactory receptors

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Morphine tolerance as a function of ratio schedule: Response requirement or unit price?

Article Abstract:

The morphine and l-methadone ED50s replicated those obtained before chronic morphine administration when the morphine, l-methadone, and cocaine dose-effect curves were redetermined after chronic morphine administration ended. The morphine data suggest that the fixed-ratio value determines the degree of tolerance and not the unit price.

Reinforcement (Psychology)

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Effects of methylphenidate and morphine on delay-discount functions obtained within sessions

Article Abstract:

Four rats responded under a 'self-control' procedure designed to obtain delay-discount functions within sessions and each session consisted of seven blocks, with seven trials within each block. The procedure used appears to be a useful and efficient method to characterize drug effects on an entire delay-discount function.

Usage, Influence, Self-control, Self control, Methylphenidate, Methylphenidate hydrochloride

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