Stroop matching task: role of feature selection and temporal modulation

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...

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Bibliographic Details
Published in:Experimental brain research 2011-02, Vol.208 (4), p.595-605
Main Authors: David, Isabel A, Volchan, Eliane, Vila, Jaime, Keil, Andreas, de Oliveira, Letícia, Faria-Júnior, Aydamari J. P, Perakakis, Pandelis, Dias, Elisa C, Mocaiber, Izabela, Pereira, Mirtes G, Machado-Pinheiro, Walter
Format: Article
Language:English
Subjects:
Attention - physiology
Attentional bias
Audition
Biological and medical sciences
Biomedical and Life Sciences
Biomedicine
Cognitive Dissonance
Color
Electroencephalography
ERP
Evoked potentials (Electrophysiology)
Evoked Potentials - physiology
Feature attention
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
Matching task
Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration
Neurology
Neurosciences
Perception
Photic Stimulation
Physiological aspects
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychomotor Performance - physiology
Reaction Time - physiology
Reading
Research Article
Stroop
Stroop Test
Vertebrates: nervous system and sense organs
Young Adult
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Summary: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.
ISSN:0014-4819
1432-1106
DOI:10.1007/s00221-010-2507-9