title: Behavioral and electrophysiological investigation of semantic and response conflict in the Stroop task.
abstract: By combining the semantic Stroop paradigm (e.g., Klein in American Journal of Psychology 77:576-588, 1964) with a single-letter coloring (SLC) procedure (e.g., Besner et al. in Psychonomic Bulletin & Review 4:221-225, 1997), this research investigated whether the frequently reported Stroop-related event-related potential (ERP) effect arising about 400 ms after stimulus onset (Ninc) is sensitive to the semantic and/or the response conflict. Consistent with our past findings (e.g., Augustinova et al. in Psychonomic Bulletin & Review 17:827-833, 2010), SLC speeded up reaction times for standard-incongruent items only, indicating that SLC reduced the response conflict that these (but not color-associated and neutral) items involve. Ninc amplitudes were more negative for standard-incongruent and color-associated than for color-neutral items. Importantly, this difference was not modulated by SLC. Hence, the behavioral and ERP results conjointly suggest that the Stroop-related Ninc is sensitive to semantic rather than to response and/or general conflict.
authors.affiliation: Laboratoire de Psychologie Sociale et Cognitive (LAPSCO - UMR CNRS 6024), CNRS and Université Blaise Pascal, 34, avenue Carnot, 63037, Clermont-Ferrand, France, maria.augustinova@univ-bpclermont.fr.
authors.forename: Maria
authors.initials: M
authors.lastname: Augustinova
authors.forename: Laetitia
authors.initials: L
authors.lastname: Silvert
authors.forename: Ludovic
authors.initials: L
authors.lastname: Ferrand
authors.forename: Pierre Michel
authors.initials: PM
authors.lastname: Llorca
authors.forename: Valentin
authors.initials: V
authors.lastname: Flaudias
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology; D003118:Color Perception / Q000502:physiology; D003220:Conflict, Psychological; D003265:Contingent Negative Variation / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials; D005074:Evoked Potentials, Visual / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D012660:Semantics; D057190:Stroop Test; D055815:Young Adult
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