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EEG Frequency Changes Prior to Making Errors in an Easy Stroop Task.

Rachel Atchley1, Daniel Klee1, Barry Oken1

  • 1Department of Neurology, Oregon Health and Science University, Portland, OR, United States.

Frontiers in Human Neuroscience
|November 23, 2017
PubMed
Summary
This summary is machine-generated.

Mind-wandering, a state of off-task attention, may be indicated by reduced alpha and theta brainwave activity. This electroencephalography (EEG) finding was observed during errors on a cognitive task.

Keywords:
alphaattentionexecutive controlmind-wanderingtheta

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Mind-wandering is linked to negative affect and rumination.
  • It represents a shift in attention away from a primary task.

Purpose of the Study:

  • To identify electroencephalography (EEG) markers of mind-wandering.
  • To investigate the relationship between task-unrelated thought and error rates.

Main Methods:

  • 27 older adults (50-80 years) performed a modified Stroop task.
  • Frontal EEG activity was recorded, focusing on epochs before stimulus presentation.
  • Behavioral data (accuracy) and EEG were analyzed for correct vs. error trials.

Main Results:

  • Errors occurred on 9% of incongruent Stroop trials; none on congruent trials.
  • A decrease in alpha and theta band EEG activity preceded error responses.
  • This pattern suggests a neural correlate of mind-wandering during task performance.

Conclusions:

  • Reduced alpha and theta activity may signal mind-wandering.
  • EEG markers could help identify off-task attention states.
  • Further research is needed to confirm these findings.