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Measuring presence during the navigation in a virtual environment using EEG.

Miriam Clemente1, Alejandro Rodríguez, Beatriz Rey

  • 1Universidad Politécnica de Valencia, I3BH/LabHuman, Valencia, Spain.

Studies in Health Technology and Informatics
|June 25, 2013
PubMed
Summary
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Researchers explored virtual reality presence using electroencephalography (EEG). Brain activity in the right insula significantly differed between free and automatic navigation, suggesting a link to the sense of presence.

Area of Science:

  • Neuroscience
  • Virtual Reality
  • Human-Computer Interaction

Background:

  • Presence, the feeling of 'being there' in a virtual world, is a key aspect of Virtual Reality (VR) experiences.
  • Measuring brain activity associated with presence can enhance our understanding of user immersion.
  • The Emotiv EPOC electroencephalography (EEG) device offers a potential tool for such measurements.

Purpose of the Study:

  • To evaluate the utility of the Emotiv EPOC EEG device for measuring brain activations related to the sense of presence.
  • To compare brain activity during free versus automatic navigation within a Virtual Environment (VE).
  • To analyze EEG data using the sLORETA tool for source localization.

Main Methods:

  • Nine healthy subjects navigated a VE under two conditions: free navigation and automatic navigation.

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  • EEG data were recorded using the Emotiv EPOC device.
  • Source localization of brain activity was performed using the sLORETA tool.

    • Main Results:

    • Significant differences in brain activity were observed between free and automatic navigation conditions.
    • Specifically, altered activity in the right insula was detected in the Theta and Alpha frequency bands.
    • These findings suggest a neural correlate for presence during VE navigation.

    Conclusions:

    • The Emotiv EPOC EEG device, analyzed with sLORETA, shows promise in detecting brain activity related to the sense of presence.
    • Right insula activation is implicated in attention and self-awareness processes crucial for presence.
    • Navigation method (free vs. automatic) influences brain activity associated with presence in VEs.