Abstract
Virtual-reality exposure therapy (VRET) is a novel intervention technique that allows individuals to experience anxiety evoking stimuli in a safe environment, to recognise specific triggers and gradually increase their exposure to perceived threats. Public-speaking anxiety (PSA) is very common form of social anxiety, characterised by stressful arousal and anxiety generated when presenting to an audience. In self-guided VRET participants can gradually increase their tolerance to exposure and reduce anxiety induced arousal and PSA over time. However, creating such a VR environment and determining physiological indices of anxiety induced arousal or distress is an open challenge. Environment modelling, character creation and animation, psychological state determination and the use of machine learning models for anxiety or stress detection are equally important, and multi-disciplinary expertise is required. In this work, we have explored a series of machine learning models with publicly available data sets (using electroencephalogram and heart rate variability) to predict arousal states. If we can detect anxiety-induced arousal, we can trigger calming activities to allow individuals to cope with and overcome the distress. Here, we discuss the means of effective selection of machine learning models and parameters in arousal detection. We propose a pipeline to overcome the model selection problem with different parameter settings in the context of Virtual Reality Exposure Therapy. This pipeline can be extended to many other domains of interest, where arousal detection is crucial.
S. Nastase—Independent Clinical Psychologist.
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Acknowledgement
Funding for the VRET study is provided by the Higher Education Funding Council for England quality-related research (QR) funding awarded to Nottingham Trent University. Additionally, this work is supported by the AI-TOP (2020-1-UK01-KA201-079167) and DIVERSASIA (618615-EPP-1-2020-1-UKEPPKA2-CBHEJP) projects, supported by the European Commission under the Erasmus+ programme.
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Rahman, M.A. et al. (2022). Towards Machine Learning Driven Self-guided Virtual Reality Exposure Therapy Based on Arousal State Detection from Multimodal Data. In: Mahmud, M., He, J., Vassanelli, S., van Zundert, A., Zhong, N. (eds) Brain Informatics. BI 2022. Lecture Notes in Computer Science(), vol 13406. Springer, Cham. https://doi.org/10.1007/978-3-031-15037-1_17
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