Cited by 258Human-Automation Interaction and SafetyEEG and Brain-Computer InterfacesNeural dynamics and brain function

EEG power spectral measures of cognitive workload: A meta‐analysis

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Chikhi, Samy, Matton, Nadine, Blanchet, Sophie·2022·Psychophysiology

Abstract

Cognitive workload (CWL) is a fundamental concept in the assessment and monitoring of human performance during cognitive tasks. Numerous studies have attempted to objectively and continuously measure the CWL using neuroimaging techniques. Although the electroencephalogram (EEG) is a widely used technique, the impact of CWL on the spectral power of brain frequencies has shown inconsistent results. The present review aimed to synthesize the results of the literature and quantitatively assess which brain frequency is the most sensitive to CWL. A systematic literature search following PRISMA recommendations highlighted three main frequency bands used to measure CWL: theta (4–8 Hz), alpha (8–12 Hz), and beta (12–30 Hz). Three meta‐analyses were conducted to quantitatively examine the effect of CWL on these frequencies. A total of 45 effect sizes from 24 studies involving 723 participants were computed. CWL was associated with significant effects on theta ( g = 0.68, CI [0.41, 0.95]), alpha ( g = −0.25, CI [−0.45, 0.04]), and beta ( g = 0.50, CI [0.21, 0.79]) power. Our results suggests that theta, especially the frontal theta, is the best index of CWL. Alpha and beta power were also significantly impacted by CWL; however, their association seemed less straightforward. These results are critically analyzed considering the literature on cerebral oscillations. We conclude by emphasizing the need to investigate the interaction between CWL and other factors that may influence spectral power (e.g., emotional load), and to combine this measure with other methods of analysis of the central and peripheral nervous system (e.g., functional connectivity, heart rate).

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  • The cognition-related frequencies are mainly below 30 Hz, and EEG beyond these frequency bands is easily confused with the electromyogram (EMG).

    “In addition, the cognition-related frequencies are mainly below 30 Hz (Chikhi et al. 2022), and EEG beyond these frequency bands is easily confused with the electromyogram (EMG) (Sleigh et al. 2001).”

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Research works printed but not linked: 3

  1. Broadbent, D. E. (1971). Decision and stress. Academic Press.
  2. Kahneman, D. (1973). Attention and effort (Vol. 1063).
  3. Schwarzer, G. (2007). meta: An R package for meta-analysis. R News, 7(3), 40-45. https://cran.rstud io.org/doc/Rnews/ Rnews_2007-3.pdf#page=40

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Authors
Chikhi, S., Matton, N., & Blanchet, S.
Affiliations
  • Laboratoire Mémoire et Cognition (FR)
  • École Nationale de l’Aviation Civile (FR)
Corresponding author
Blanchet, Sophie
Venue
Psychophysiology
Publisher
Wiley
Published
2022-02-06
Volume
59
Issue
6
Pages
e14009-e14009
ISSN
  • 0048-5772 (ISSN-L)
  • 1469-8986
OpenAlex
W4220781804
Cited by
258
References
164
Citations by year
2026: 87 · 2025: 71 · 2024: 67 · 2023: 28 · 2022: 5
FWCI
6.40
Type
journal article
Language
en
Open access
Locations
  • Psychophysiology (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • OSF Preprints (OSF Preprints) (submittedVersion)
Funders
  • Ecole Nationale de l'Aviation Civile
  • Agence de l'innovation de Défense
Topics
  • Social Sciences › Psychology › Social Psychology › Human-Automation Interaction and Safety
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
mental workload, EEG spectral power, theta power, alpha power, beta power, frontal theta, neural oscillations, cognitive load monitoring, emotional burden, functional connectivity
MeSH terms
Brain, Cognition, Electroencephalography, Emotions, Humans

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