Open Access. Powered by Scholars. Published by Universities.®

Education Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 3 of 3

Full-Text Articles in Education

Dissociation Of The Role Of The Prelimbic Cortex In Interval Timing And Resource Allocation: Beneficial Effect Of Norepinephrine And Dopamine Reuptake Inhibitor Nomifensine On Anxiety-Inducing Distraction, Alexander R. Matthews, Olivia H. He, Mona Buhusi, Catalin V. Buhusi Dec 2012

Dissociation Of The Role Of The Prelimbic Cortex In Interval Timing And Resource Allocation: Beneficial Effect Of Norepinephrine And Dopamine Reuptake Inhibitor Nomifensine On Anxiety-Inducing Distraction, Alexander R. Matthews, Olivia H. He, Mona Buhusi, Catalin V. Buhusi

Psychology Faculty Publications

Emotional distracters impair cognitive function. Emotional processing is dysregulated in affective disorders such as depression, phobias, schizophrenia, and PTSD. Among the processes impaired by emotional distracters, and whose dysregulation is documented in affective disorders, is the ability to time in the seconds-to-minutes range, i.e. interval timing. Presentation of task-irrelevant distracters during a timing task results in a delay in responding suggesting a failure to maintain subjective time in working memory, possibly due to attentional and working memory resources being diverted away from timing, as proposed by the Relative Time-Sharing model. We investigated the role of the prelimbic cortex in ...


Delayed Matching To Sample: Reinforcement Has Opposite Effects On Resistance To Change In Two Related Procedures, John A. Nevin, Timothy A. Shahan, Amy Odum, Ryan Ward Dec 2012

Delayed Matching To Sample: Reinforcement Has Opposite Effects On Resistance To Change In Two Related Procedures, John A. Nevin, Timothy A. Shahan, Amy Odum, Ryan Ward

Psychology Faculty Publications

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 within multiple-schedule components (designated multiple VI DMTS). In both procedures, forgetting functions in rich trials or components are higher than and roughly parallel to those in lean trials or components. However, during disruption, accuracy has been found to decrease more in rich than in ...


Concurrent Chains Schedules As A Method To Study Choice Between Alcohol Associated Conditioned Reinforcers, Corina Jimenez-Gomez, Timothy A. Shahan Jan 2012

Concurrent Chains Schedules As A Method To Study Choice Between Alcohol Associated Conditioned Reinforcers, Corina Jimenez-Gomez, Timothy A. Shahan

Psychology Faculty Publications

An extensive body of research using concurrent-chains schedules of reinforcement has shown that choice for one of two differentially valued food-associated stimuli is dependent upon the overall temporal context in which those stimuli are embedded. The present experiments examined whether the concurrent chains procedure was useful for the study of behavior maintained by alcohol and alcohol-associated stimuli. In Experiment 1, rats responded on concurrent-chains schedules with equal variable-interval (VI) 10-s schedules in the initial links. Across conditions, fixed-interval schedules in the terminal links were varied to yield 1:1, 9:1, and 1:9 ratios of alcohol delivery. Initial-link response ...