Investigating the Generalizability of Physiological Characteristics of Anxiety

• URL: http://arxiv.org/abs/2402.15513v1
• Date: Tue, 23 Jan 2024 16:49:54 GMT
• Title: Investigating the Generalizability of Physiological Characteristics of Anxiety
• Authors: Emily Zhou, Mohammad Soleymani, Maja J. Matarić,
• Abstract summary: We evaluate the generalizability of physiological features that have been shown to be correlated with anxiety and stress to high-arousal emotions. This work is the first cross-corpus evaluation across stress and arousal from ECG and EDA signals, contributing new findings about the generalizability of stress detection.
• Score: 3.4036712573981607
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Recent works have demonstrated the effectiveness of machine learning (ML) techniques in detecting anxiety and stress using physiological signals, but it is unclear whether ML models are learning physiological features specific to stress. To address this ambiguity, we evaluated the generalizability of physiological features that have been shown to be correlated with anxiety and stress to high-arousal emotions. Specifically, we examine features extracted from electrocardiogram (ECG) and electrodermal (EDA) signals from the following three datasets: Anxiety Phases Dataset (APD), Wearable Stress and Affect Detection (WESAD), and the Continuously Annotated Signals of Emotion (CASE) dataset. We aim to understand whether these features are specific to anxiety or general to other high-arousal emotions through a statistical regression analysis, in addition to a within-corpus, cross-corpus, and leave-one-corpus-out cross-validation across instances of stress and arousal. We used the following classifiers: Support Vector Machines, LightGBM, Random Forest, XGBoost, and an ensemble of the aforementioned models. We found that models trained on an arousal dataset perform relatively well on a previously unseen stress dataset, and vice versa. Our experimental results suggest that the evaluated models may be identifying emotional arousal instead of stress. This work is the first cross-corpus evaluation across stress and arousal from ECG and EDA signals, contributing new findings about the generalizability of stress detection.

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