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    block this user Pandelis Perakakis

    Post Doctorate

    Economics department, Universitet Jaume I, Castellon

    Stroop matching task: role of feature selection and temporal modulation.

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    We conducted an event-related potential (ERP) study to investigate the electrocortical dynamics of attentional feature-based processing in the Stroop matching task. Participants in the study (n = 37) compared the ink color of a colored word with the meaning of a color-word in white ink. The two task stimuli were presented simultaneously or with SOAs (Stimulus Onset Asynchrony) of 400 and 1,200 ms. The Stroop matching effect was maximal during SOA-0, was reduced at SOA-400, and was inverted at SOA-1200. We focused the ERP analysis on the N1 component. Paralleling the behavioral results, the N1 amplitude was greater for congruent stimuli than incongruent stimuli during SOA-0. This difference was attenuated at SOA-400, and at SOA-1200, an inverse pattern was observed. The results provide evidence that early selection processing participated in the Stroop matching task phenomenon and also suggest that the temporal modulation of early attention is a function of task characteristics such as SOA.

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    Description

    Title : Stroop matching task: role of feature selection and temporal modulation.
    Author(s) : Isabel A David, Eliane Volchan, Jaime Vila, Andreas Keil, Letícia De Oliveira, Aydamari J P Faria-Júnior, Pandelis Perakakis, Elisa C Dias, Izabela Mocaiber, Mirtes G Pereira, Walter Machado-Pinheiro
    Abstract : We conducted an event-related potential (ERP) study to investigate the electrocortical dynamics of attentional feature-based processing in the Stroop matching task. Participants in the study (n = 37) compared the ink color of a colored word with the meaning of a color-word in white ink. The two task stimuli were presented simultaneously or with SOAs (Stimulus Onset Asynchrony) of 400 and 1,200 ms. The Stroop matching effect was maximal during SOA-0, was reduced at SOA-400, and was inverted at SOA-1200. We focused the ERP analysis on the N1 component. Paralleling the behavioral results, the N1 amplitude was greater for congruent stimuli than incongruent stimuli during SOA-0. This difference was attenuated at SOA-400, and at SOA-1200, an inverse pattern was observed. The results provide evidence that early selection processing participated in the Stroop matching task phenomenon and also suggest that the temporal modulation of early attention is a function of task characteristics such as SOA.
    Keywords : attention, attention physiology, cognitive dissonance, color, electroencephalography, evoked potentials, evoked potentials physiology, female, humans, male, photic stimulation, psychomotor performance, psychomotor performance physiology, reaction time, re

    Subject : unspecified
    Area : Other
    Language : English
    Year : 2011

    Affiliations Economics department, Universitet Jaume I, Castellon
    Journal : Experimental Brain Research
    Volume : 208
    Issue : 4
    Pages : 595-605
    Url : http://www.ncbi.nlm.nih.gov/pubmed/21161193

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