Towards an objective measurement of presence, place illusion, and plausibility illusion in virtual reality using electroencephalography

Presence is a mental state when a user in virtual reality (VR) reacts to events in it as if it is real. Place illusion (PI) and plausibility illusion (PSI) are components of Presence and depend on the Immersion and Coherence of a VR system and the experience. Measuring Presence (PI and PSI) is criti...

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Published inVirtual reality : the journal of the Virtual Reality Society Vol. 27; no. 3; pp. 2649 - 2664
Main Authors Bahavan, Thiru Thillai Nadarasar, Navaratnarajah, Suman, Owinda, Dulindu, Akalanka, Inoj, Peiris, Roshan, Silva, Anjula De
Format Journal Article
LanguageEnglish
Published London Springer London 01.09.2023
Springer Nature B.V
Subjects
Online AccessGet full text
ISSN1359-4338
1434-9957
DOI10.1007/s10055-023-00815-x

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Abstract Presence is a mental state when a user in virtual reality (VR) reacts to events in it as if it is real. Place illusion (PI) and plausibility illusion (PSI) are components of Presence and depend on the Immersion and Coherence of a VR system and the experience. Measuring Presence (PI and PSI) is critical when designing new systems and experiences. However, the traditional questionnaire-based methods of measuring Presence have limitations. Therefore, we propose a method for augmented measurement of Presence, PI, and PSI of VR users with biosignals. For this, we designed a within-subjects experiment that presented VR scenarios with varying levels of Immersion and Coherence while measuring electroencephalography (EEG) of users concurrently. For validation, we took feedback from post-scenario questionnaires presented within the VR environment. The study was conducted with 20 participants. Analyzing the Questionnaire responses revealed that an increase in plausibility illusion or place illusion led to an increase in Presence, confirming the fundamental theory. Analyzing the EEG results revealed that the Envelope Amplitude Correlation features and Spectral Coherence are able to discriminate between the Presence, PI, and PSI of the user. In contrast, there are many entropy features that increase for high PSI.
AbstractList Presence is a mental state when a user in virtual reality (VR) reacts to events in it as if it is real. Place illusion (PI) and plausibility illusion (PSI) are components of Presence and depend on the Immersion and Coherence of a VR system and the experience. Measuring Presence (PI and PSI) is critical when designing new systems and experiences. However, the traditional questionnaire-based methods of measuring Presence have limitations. Therefore, we propose a method for augmented measurement of Presence, PI, and PSI of VR users with biosignals. For this, we designed a within-subjects experiment that presented VR scenarios with varying levels of Immersion and Coherence while measuring electroencephalography (EEG) of users concurrently. For validation, we took feedback from post-scenario questionnaires presented within the VR environment. The study was conducted with 20 participants. Analyzing the Questionnaire responses revealed that an increase in plausibility illusion or place illusion led to an increase in Presence, confirming the fundamental theory. Analyzing the EEG results revealed that the Envelope Amplitude Correlation features and Spectral Coherence are able to discriminate between the Presence, PI, and PSI of the user. In contrast, there are many entropy features that increase for high PSI.
Author Silva, Anjula De
Bahavan, Thiru Thillai Nadarasar
Navaratnarajah, Suman
Akalanka, Inoj
Owinda, Dulindu
Peiris, Roshan
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CitedBy_id crossref_primary_10_1016_j_chbr_2024_100505
crossref_primary_10_3390_app14188192
crossref_primary_10_1080_10447318_2024_2344150
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Keywords Measurement
EEG
Place illusion
Virtual reality
Physiological sensing
Presence
Plausibility illusion
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Snippet Presence is a mental state when a user in virtual reality (VR) reacts to events in it as if it is real. Place illusion (PI) and plausibility illusion (PSI) are...
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SubjectTerms Artificial Intelligence
Coherence
Computer Graphics
Computer Science
Electroencephalography
Image Processing and Computer Vision
Measurement methods
Original Article
Questionnaires
User Interfaces and Human Computer Interaction
Virtual reality
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Title Towards an objective measurement of presence, place illusion, and plausibility illusion in virtual reality using electroencephalography
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