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January 25, 2026Brain SciencesOpen Access

Frontal Theta Oscillations in Perceptual Decision-Making Reflect Cognitive Control and Confidence

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Authors

RPRashmi ParajuliEFEleanor FlynnMDMukesh Dhamala

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Overview

Examines how theta activity varies with task difficulty, suggesting implications for cognitive control and confidence levels.

Key Points

  • The aim is to explore how task difficulty influences theta oscillations during perceptual decision-making.
  • Acquired EEG data from 26 healthy adults performing a face/house categorization task.
  • Utilized images with varying levels of clarity: clear, moderate, and high noise.
  • Analyzed theta dynamics through current source density time courses and single-trials.
  • Employed Wilcoxon signed-rank tests with false discovery rate correction for analysis.
  • Greater frontal theta power was observed for clear stimuli compared to noisy ones (p < 0.001).
  • Frontoparietal theta coupling varied with stimulus clarity in both evoked and induced synchronization.
  • Phase-locked (evoked) synchronization had a stronger effect than ongoing (induced) synchronization.

Cite This Study

Parajuli et al. (2026) studied this question.

synapsesocial.com/papers/6975b4fd5a65d392b01e5c0dhttps://doi.org/10.3390/brainsci16020123
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