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Modulation of EEG Signals by Visual and Auditory Distractors in Virtual Reality-Based Continuous Performance Tests.

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    Virtual reality tests with distractors alter brainwaves. Visual distractors reduced theta activity, auditory enhanced alpha, and both decreased beta waves, offering insights for attention deficit rehabilitation.

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    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Human-Computer Interaction

    Background:

    • Virtual reality-based continuous performance tests (VR-CPT) offer enhanced ecological validity over traditional methods.
    • Previous research on VR-CPT focused on behavioral outcomes, with limited investigation into the electroencephalography (EEG) effects of distractors.

    Purpose of the Study:

    • To investigate the influence of visual and auditory distractors on EEG signals during VR-CPT.
    • To understand how different types of distractors modulate brain activity in various frequency bands.

    Main Methods:

    • Sixty-eight participants completed four VR-CPT tasks with varying visual and auditory distractors.
    • Paired t-tests were used to analyze mean relative power in the ROI region across five electrodes and different frequency bands (theta, alpha, beta).

    Main Results:

    • Significant differences in theta waves were observed between conditions with and without auditory distractors (p < 0.05).
    • Alpha wave activity showed significant differences when comparing conditions with and without auditory distractors (p < 0.001).
    • Beta wave activity was significantly reduced by both visual and auditory distractors compared to conditions without them (p < 0.001 and p < 0.05).

    Conclusions:

    • Distractors in VR-CPT modulate EEG signals, affecting theta, alpha, and beta wave activity.
    • Visual distractors attenuate theta activity, auditory distractors enhance alpha activity, and both reduce beta oscillations.
    • Findings provide valuable insights for developing rehabilitation strategies for attention deficits in children and adolescents.