Online Classifier of AMICA Model to Evaluate State Anxiety While Standing in Virtual Reality

G Liao, S Wang, Z Wei, Bohan Liu, R Okubo, ME Hernandez

IEEE EMBC 2022 PubMed ↗ Scholar ↗

Abstract

Changes in emotional state, such as anxiety, have a significant impact on behavior and mental health. However, the detection of anxiety in individuals requires trained specialists to administer specialized assessments, which often take a significant amount of time and resources. Thus, there is a significant need for objective and real-time anxiety detection methods to aid clinical practice. Recent advances in Adaptive Mixture Independent Component Analysis (AMICA) have demonstrated the ability to detect changes in emotional states using electroencephalographic (EEG) data. However, given that several hours may be needed to identify the different models, alternative methods must be sought for future brain-computer-interface applications. This study examines the feasibility of a machine learning classifier using frequency domain features of EEG data to classify individual 500 ms samples of EEG data into different cortical states, as established by multi-model AMICA labels. Using a random forest classifier with 12 input features from EEG data to predict cortical states yielded a 75 percent accuracy in binary classification. Based on these findings, this work may provide a foundation for real-time anxiety state detection and classification.

What this paper contributes

An online classifier built on AMICA EEG features that detects state anxiety while a person stands in virtual reality: real-time monitoring with applications in fall-prevention and VR therapy.

BibTeX

@inproceedings{liao2022amica,
  title     = {Online Classifier of AMICA Model to Evaluate State Anxiety While Standing in Virtual Reality},
  author    = {G Liao and S Wang and Z Wei and Bohan Liu and R Okubo and ME Hernandez},
  booktitle = {IEEE Engineering in Medicine and Biology Conference (EMBC)},
  year      = {2022}
}