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Measuring the face-sensitive N170 with a gaming EEG system: A validation study.

Peter de Lissa1, Sidsel Sörensen1, Nicholas Badcock1

  • 1Department of Cognitive Science, ARC Centre of Excellence in Cognition and its Disorders, Macquarie University, Sydney, NSW, Australia.

Journal of Neuroscience Methods
|June 10, 2015
PubMed
Summary

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A gaming EEG system successfully measured the face-sensitive N170 event-related potential (ERP). This validates using accessible technology for brain research outside traditional labs, expanding study possibilities for diverse populations.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychophysiology

Background:

  • The N170 event-related potential (ERP) is a key neural marker for face processing, typically measured in controlled laboratory settings.
  • Traditional laboratory environments can be intimidating or inaccessible for certain populations, limiting N170 research.
  • The N170 reflects neural activity around 170ms over occipito-temporal regions, sensitive to facial features.

Purpose of the Study:

  • To evaluate the validity of a commercial, gaming-oriented EEG system (Emotiv EPOC) for recording the face-sensitive N170.
  • To determine if this accessible EEG technology can reliably detect N170 responses to faces.
  • To explore the potential of using portable EEG for N170 research in non-traditional settings.

Main Methods:

Keywords:
ERPsFacesN170VPP

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  • An adapted commercial EEG system (Emotiv EPOC) was used to record N170 responses.
  • Participants viewed face and non-face stimuli to elicit ERPs.
  • Data from the EPOC system was compared to a research-grade EEG system (Neuroscan).

    • Main Results:

    • The Emotiv EPOC system successfully recorded N170s that demonstrated face-sensitivity.
    • N170 amplitudes were larger for face stimuli compared to non-face stimuli.
    • Face inversion led to a delayed N170 peak, consistent with known N170 properties.

    Conclusions:

    • The Emotiv EPOC system is a valid tool for measuring the face-sensitive N170, yielding results comparable to research-grade equipment.
    • This technology enables N170 research in ecologically valid settings and with populations previously excluded from lab-based studies.
    • Expanded applications include research with children, the elderly, individuals with autism, and in-situ testing.