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Frontal Alpha Asymmetry and Delta–Beta Correlation as EEG Biomarkers of Cognitive Control Deficits in Public Speaking Anxiety

Author

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  • Beh Soon Tatt

    (Fakulti Teknologi dan Kejuruteraan Elektronik dan Komputer (FTKEK), Universiti Teknikal Malaysia Melaka, Melaka, Malaysia)

  • Farah Shahnaz Feroz

    (Fakulti Teknologi dan Kejuruteraan Elektronik dan Komputer (FTKEK), Universiti Teknikal Malaysia Melaka, Melaka, Malaysia)

  • Mohd Fauzi Ab Rahman

    (Fakulti Teknologi dan Kejuruteraan Elektronik dan Komputer (FTKEK), Universiti Teknikal Malaysia Melaka, Melaka, Malaysia)

  • Akmal Razak

    (Fakulti Teknologi dan Kejuruteraan Elektronik dan Komputer (FTKEK), Universiti Teknikal Malaysia Melaka, Melaka, Malaysia)

  • Omar S. Masohood

    (Jabatan Psikiatri dan Kesihatan Mental, Hospital Tengku Ampuan Rahimah Klang, Selangor, Malaysia.)

  • Kenneth Sundaraj

    (Fakulti Teknologi dan Kejuruteraan Elektronik dan Komputer (FTKEK), Universiti Teknikal Malaysia Melaka, Melaka, Malaysia)

  • Vigneswaran Narayanamurthy

    (Department of Biomedical Engineering, Rajalakshmi Engineering College, Chennai – 602105.)

Abstract

Although public speaking anxiety (PSA) is extensively studied, objective neurophysiological markers of its cognitive control deficits remain underexplored. This study aimed to investigate brain-behavior mechanisms underlying PSA through analysis of reaction time (RT) and electroencephalogram (EEG) data, utilizing the ex-Gaussian model, Frontal Alpha Asymmetry (FAA) and Delta Beta Correlation (DBC). A Stroop experiment was conducted with 12 High (H) PSA subjects and 12 matched Low (L) PSA subjects. EEG data were recorded from 14 channels. The findings aligned with expectations: HPSA subjects exhibited increased ex-Gaussian parameters (μ, σ and τ) and higher right FAA compared to the LPSA group. Statistically significant (p< 0.05) increased DBC were identified in the frontal and parietal brain regions. The analyses of ex-Gaussian parameters, FAA, and DBC are valuable in biomedical engineering, as they effectively reveal biomarkers of cognitive control deficits during PSA.

Suggested Citation

  • Beh Soon Tatt & Farah Shahnaz Feroz & Mohd Fauzi Ab Rahman & Akmal Razak & Omar S. Masohood & Kenneth Sundaraj & Vigneswaran Narayanamurthy, 2025. "Frontal Alpha Asymmetry and Delta–Beta Correlation as EEG Biomarkers of Cognitive Control Deficits in Public Speaking Anxiety," International Journal of Research and Innovation in Social Science, International Journal of Research and Innovation in Social Science (IJRISS), vol. 9(8), pages 5520-5527, August.
    • Handle: RePEc:bcp:journl:v:9:y:2025:issue-8:p:5520-5527
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