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An ERP study of the temporal course of the Stroop color-word interference effect.

Publication ,  Journal Article
Liotti, M; Woldorff, MG; Perez, R; Mayberg, HS
Published in: Neuropsychologia
2000

The electrophysiological correlates of the Stroop color-word interference effect were studied in eight healthy subjects using high-density Event-Related Potentials (ERPs). Three response modalities were compared: Overt Verbal, Covert Verbal, and Manual. Both Overt Verbal and Manual versions of the Stroop yielded robust Stroop color-word interference as indexed by longer RT for incongruent than congruent color words. The Incongruent vs Congruent ERP difference wave presented two effects. A first effect was a medial dorsal negativity between 350-500 ms post-stimulus (peak at 410 ms). This effect had a significantly different scalp distribution in the Verbal and Manual Stroop versions, with an anterior-medial focus for overt or covert speech, and a broader medial-dorsal distribution for the manual task. Dipole source analysis suggested two independent generators in anterior cingulate cortex. Later on in time, a prolonged positivity developed between 500-800 ms post-stimulus over left superior temporo-parietal scalp. This effect was present for all the three response modalities. A possible interpretation of these results is that Stroop color-word interference first activates anterior cingulate cortex (350-500 ms post-stimulus), followed by activation of the left temporo-parietal cortex, possibly related to the need of additional processing of word meaning.

Duke Scholars

Published In

Neuropsychologia

DOI

ISSN

0028-3932

Publication Date

2000

Volume

38

Issue

5

Start / End Page

701 / 711

Location

England

Related Subject Headings

  • Psychomotor Performance
  • Photic Stimulation
  • Neuropsychological Tests
  • Male
  • Magnetic Resonance Imaging
  • Humans
  • Female
  • Experimental Psychology
  • Evoked Potentials
  • Electroencephalography
 

Citation

APA
Chicago
ICMJE
MLA
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Liotti, M., Woldorff, M. G., Perez, R., & Mayberg, H. S. (2000). An ERP study of the temporal course of the Stroop color-word interference effect. Neuropsychologia, 38(5), 701–711. https://doi.org/10.1016/s0028-3932(99)00106-2
Liotti, M., M. G. Woldorff, R. Perez, and H. S. Mayberg. “An ERP study of the temporal course of the Stroop color-word interference effect.Neuropsychologia 38, no. 5 (2000): 701–11. https://doi.org/10.1016/s0028-3932(99)00106-2.
Liotti M, Woldorff MG, Perez R, Mayberg HS. An ERP study of the temporal course of the Stroop color-word interference effect. Neuropsychologia. 2000;38(5):701–11.
Liotti, M., et al. “An ERP study of the temporal course of the Stroop color-word interference effect.Neuropsychologia, vol. 38, no. 5, 2000, pp. 701–11. Pubmed, doi:10.1016/s0028-3932(99)00106-2.
Liotti M, Woldorff MG, Perez R, Mayberg HS. An ERP study of the temporal course of the Stroop color-word interference effect. Neuropsychologia. 2000;38(5):701–711.
Journal cover image

Published In

Neuropsychologia

DOI

ISSN

0028-3932

Publication Date

2000

Volume

38

Issue

5

Start / End Page

701 / 711

Location

England

Related Subject Headings

  • Psychomotor Performance
  • Photic Stimulation
  • Neuropsychological Tests
  • Male
  • Magnetic Resonance Imaging
  • Humans
  • Female
  • Experimental Psychology
  • Evoked Potentials
  • Electroencephalography