Effects of Δ9-tetrahydrocannabinol on delayed matching-to-sample choice speeds in chimpanzees
نویسندگان
چکیده
منابع مشابه
Choice biases in delayed matching-to-sample duration with pigeons: Manipulations of ITI and delay illumination.
Two experiments investigated the effects of similarity between intertrial interval (ITI) and delay illumation on the choose-short effect. Different groups of pigeons learned to match "short" (2 s) and "long" (6 or 8 s) food samples to green and red test stimuli in a matching-to-sample procedure with a 5-s training delay. Subsequent 10- and 20-s delay tests revealed choose-short effects if the I...
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The effects of reinforcement on delayed matching to sample (DMTS) have been studied in two within-subjects procedures. In one, reinforcer magnitudes or probabilities vary from trial to trial and are signaled within trials (designated signaled DMTS trials). In the other, reinforcer probabilities are consistent for a series of trials produced by responding on variable-interval (VI) schedules with...
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Evidence is increasing for involvement of the endocannabinoid system in cognitive functions including attention and executive function, as well as in psychiatric disorders characterized by cognitive deficits, such as schizophrenia. Executive function appears to be associated with both modulation of active networks and inhibition of activity in the default mode network. In the present study, we ...
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BXSB mice have small neocortical anomalies (ectopic collections of neurons in layer I), with an incidence of about 40-60%. Previous studies have found that ectopic mice from this strain are faster than non-ectopics in learning the Morris water maze (reference memory), but have poorer working memory for spatial learning. The current study continues the investigation of working memory by testing ...
متن کاملOn the effects of signaling reinforcer probability and magnitude in delayed matching to sample.
Two experiments examined whether postsample signals of reinforcer probability or magnitude affected the accuracy of delayed matching to sample in pigeons. On each trial, red or green choice responses that matched red or green stimuli seen shortly before a variable retention interval were reinforced with wheat access. In Experiment 1, the reinforcer probability was either 0.2 or 1.0 for both red...
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ژورنال
عنوان ژورنال: Bulletin of the Psychonomic Society
سال: 1973
ISSN: 0090-5054
DOI: 10.3758/bf03334432