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| Research article summary (published 30 Mar 2002): |
The duality of selection: excitatory and inhibitory processes in auditory selective attention.
Full Abstract
Behavioral and event-related potential (ERP) measurements were made in an auditory selective-attention paradigm, both before and after a series of inhibition or discrimination training sessions. The presence of distractors caused poor perceptual sensitivity, weak P3 responses, conservative responding, and slow reaction times relative to baseline. Distraction prompted a frontal enhancement of ERP components occurring 100-250 ms after the onset of attended signals (N1, P2, and N2). Training ameliorated behavioral interference from distraction. Participants receiving inhibition training acquired improved inhibitory processing of distractors, an effect that peaked 200 ms after distractor onset. In a proposed model, distinct excitatory and inhibitory mechanisms work interactively to maintain sensitivity to environmental change in the face of disruption from the contextual integration of irrelevant events.
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Author information
Author/s: Melara, Robert D (RD); Rao, Aparna (A); Tong, Yunxia (Y);
Affiliation: Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907-1364, USA. melara(-atsign-)psych.purdue.edu
Journal and publication information
Publication Type: Journal Article
Journal: Journal of experimental psychology. Human perception and performance (J Exp Psychol Hum Percept Perform), published in United States. (Language: eng)
Reference: 2002-Apr; vol 28 (issue 2) : pp 279-306
Dates: Created 2002/05/09; Completed 2003/01/24; Revised 2004/11/17;
PMID: 11999855, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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