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An event-related functional MRI study comparing interference effects in the Simon and Stroop tasks.

Bradley S Peterson1, Michael J Kane, Gerianne M Alexander

  • 1The Division of Child and Adolescent Psychiatry, Department of Psychiatry, the New York State Psychiatric Institute and the College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA. petersob@child.cpmc.columbia.edu

Brain Research. Cognitive Brain Research
|March 29, 2002
PubMed
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The Stroop and Simon tasks, which cause interference by irrelevant stimuli, engage similar brain regions and timing. This suggests overlapping neural systems resolve interference across different cognitive tasks.

Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Interference effects in tasks like Stroop and Simon slow reaction times due to irrelevant stimuli.
  • Previous behavioral studies have not clarified if neural mechanisms for resolving this interference are task-specific.

Purpose of the Study:

  • To investigate the neural basis of interference resolution in the Stroop and Simon tasks.
  • To compare brain activation patterns and timing between the two tasks.

Main Methods:

  • Event-related functional magnetic resonance imaging (fMRI) was used.
  • 10 healthy young adults performed both Stroop and Simon tasks.

Main Results:

  • fMRI revealed similar patterns of brain activation for both tasks, including anterior cingulate, supplementary motor, and prefrontal cortices.

Related Experiment Videos

  • Activation time courses were also comparable across the Stroop and Simon tasks.
  • Specific regions involved included visual association, inferior temporal, inferior parietal, inferior frontal, and dorsolateral prefrontal cortices, plus caudate nuclei.

    • Conclusions:

    • Resolution of interference effects in the Simon and Stroop tasks involves similar brain regions.
    • The neural systems supporting successful task performance appear to be shared across these distinct interference tasks.