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Facilitating Novice Visual Search with tES over rIFG: Baseline-Dependent Gains in Target Identification
Bradley M Robert1, Aaron Winder2, Mason S Briggs1
1Psychology Clinical Neuroscience Center, Department of Psychology, University of New Mexico, Albuquerque, NM 87131, USA.
Brain Sciences
|January 28, 2026
Summary
Transcranial direct current stimulation (tDCS) improved visual search accuracy, especially for low performers. This brain stimulation technique shows promise for enhancing training in novice populations.
Area of Science:
- Neuroscience
- Cognitive Science
Background:
- Transcranial electrical stimulation (tES) has potential for cognitive enhancement.
- Its application in real-world tasks like visual search requires further investigation.
Purpose of the Study:
- To evaluate transcranial direct current stimulation (tDCS) and high-frequency transcranial random noise stimulation (hf-tRNS) effects on visual search performance.
- To determine if these brain stimulation methods enhance target identification and change detection.
Main Methods:
- Sixty-four participants underwent tDCS alone, tDCS with hf-tRNS, or sham stimulation during a visual search training task.
- Performance accuracy and EEG oscillatory power were measured pre- and post-stimulation.
Main Results:
- tDCS significantly improved target identification accuracy compared to sham stimulation.
- Individuals with lower baseline performance showed the most significant improvements with tDCS.
- Decreased frontal theta power correlated with accuracy gains in the tDCS group.
Conclusions:
- tDCS over the right inferior frontal gyrus selectively enhances visual search target identification.
- This brain stimulation method particularly benefits novice individuals with lower baseline performance.
- tDCS may be a valuable tool for facilitating training in specific populations.
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