A dissociation in attentional control: Evidence from methamphetamine dependence
| Autor: | Charles Moore, Christy Waters, Ruth Salo, Shawn J. Kile, Edith V. Sullivan, Yutaka Natsuaki, Gantt P. Galloway, Thomas E. Nordahl |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Task switching medicine.medical_specialty Dissociation (neuropsychology) Substance-Related Disorders media_common.quotation_subject Poison control Dissociative Disorders Neuropsychological Tests Audiology Methamphetamine Discrimination Learning Task Performance and Analysis Basal ganglia Reaction Time medicine Humans Attention Biological Psychiatry media_common Analysis of Variance Attentional control Cognition Middle Aged Inhibition Psychological Female Psychology Neuroscience Photic Stimulation Psychomotor Performance Vigilance (psychology) medicine.drug |
| Zdroj: | Biological Psychiatry. 57:310-313 |
| ISSN: | 0006-3223 |
| Popis: | Background Selective attention comprises multiple, dissociable component processes, including task shifting and selective inhibition. The goal of this study was to test whether task-shifting, selective inhibition, or both processes were impaired in long-term but currently abstinent methamphetamine-dependent individuals. Methods Participants were 34 methamphetamine-dependent subjects and 20 nonsubstance abusing controls who were tested on an alternating-runs switch task with conflict sequences that required subjects to switch tasks on every second trial (AABBAABB). Results Methamphetamine-dependent individuals committed more errors on trials that required inhibition of distracting information compared with controls (methamphetamine = 17%; controls = 13%; p = .02). By contrast, error rates did not differ between the groups on switch trials (methamphetamine = 7%; controls = 6%; p = .68). Conclusions These results indicate that selective inhibition, but not task switching, is selectively compromised by methamphetamine. |
| Databáze: | OpenAIRE |
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