Source:http://linkedlifedata.com/resource/pubmed/id/19071142
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
3
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| pubmed:dateCreated |
2009-2-16
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| pubmed:abstractText |
Cognitive control theory suggests conflict effects are reduced following high- relative to low-conflict trials. Such reactive adjustments in control, frequently termed "conflict adaptation effects," indicate a dynamic interplay between regulative and evaluative components of cognitive control necessary for adaptable goal-directed behavior. The current study examined conflict adaptation effects while 36 neurologically-normal participants performed a single-trial color-naming Stroop task. Trials preceded by incongruent (high conflict) and congruent (low conflict) trials were compared for behavioral (response time [RT] and error rate) and electrophysiological (N450 and conflict SP components of the event-related potential [ERP]) concomitants of cognitive control. A conflict adaptation effect was present for RTs that could not be accounted for by associative or negative priming. ERPs revealed a parietal conflict slow potential (conflict SP) that differentiated incongruent from congruent trials and monotonically differentiated current trial congruency on the basis of previous-trial context (i.e., showed conflict adaptation); the fronto-medial N450 was sensitive to current trial congruency but not to previous-trial context. Direct comparison of normalized conflict SP and N450 amplitudes showed the conflict SP was sensitive to the effects of previous-trial context, while the N450 was so to a lesser extent and in a different pattern. Findings provide clarification on the neural time course of conflict adaptation and raise further questions regarding the relative roles of the parietal conflict SP and fronto-medial N450 in conflict detection and processing.
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| pubmed:grant | |
| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:status |
MEDLINE
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| pubmed:month |
Feb
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| pubmed:issn |
0028-3932
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
47
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
663-70
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| pubmed:dateRevised |
2009-11-11
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| pubmed:meshHeading |
pubmed-meshheading:19071142-Adolescent,
pubmed-meshheading:19071142-Adult,
pubmed-meshheading:19071142-Brain,
pubmed-meshheading:19071142-Brain Mapping,
pubmed-meshheading:19071142-Cognition,
pubmed-meshheading:19071142-Color Perception,
pubmed-meshheading:19071142-Conflict (Psychology),
pubmed-meshheading:19071142-Electroencephalography,
pubmed-meshheading:19071142-Electrophysiology,
pubmed-meshheading:19071142-Evoked Potentials,
pubmed-meshheading:19071142-Female,
pubmed-meshheading:19071142-Functional Laterality,
pubmed-meshheading:19071142-Humans,
pubmed-meshheading:19071142-Male,
pubmed-meshheading:19071142-Middle Aged,
pubmed-meshheading:19071142-Neurons,
pubmed-meshheading:19071142-Neuropsychological Tests,
pubmed-meshheading:19071142-Photic Stimulation,
pubmed-meshheading:19071142-Reaction Time,
pubmed-meshheading:19071142-Young Adult
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| pubmed:year |
2009
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| pubmed:articleTitle |
Neural time course of conflict adaptation effects on the Stroop task.
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| pubmed:affiliation |
Department of Psychology, Brigham Young University, Provo, UT, United States. michael_larson@byu.edu
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| pubmed:publicationType |
Journal Article,
Research Support, N.I.H., Extramural
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