Deep Support Vector Machines for the Identification of Stress Condition from Electrodermal Activity

Early detection of stress condition is beneficial to prevent long-term mental illness like depression and anxiety. This paper introduces an accurate identification of stress/calm condition from electrodermal activity (EDA) signals. The acquisition of EDA signals from a commercial wearable as well as...

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Bibliographic Details
Published in:International journal of neural systems 2020-07, Vol.30 (7), p.2050031
Main Authors: Sánchez-Reolid, Roberto, Martínez-Rodrigo, Arturo, López, María T., Fernández-Caballero, Antonio
Format: Article
Language:English
Subjects:
Biomarkers
Classification
Feature extraction
Identification
Research Article
Resistance
Signal classification
Signal processing
Support vector machines
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Summary:Early detection of stress condition is beneficial to prevent long-term mental illness like depression and anxiety. This paper introduces an accurate identification of stress/calm condition from electrodermal activity (EDA) signals. The acquisition of EDA signals from a commercial wearable as well as their storage and processing are presented. Several time-domain, frequency-domain and morphological features are extracted over the skin conductance response of the EDA signals. Afterwards, a classification is undergone by using several classical support vector machines (SVMs) and deep support vector machines (D-SVMs). In addition, several binary classifiers are also compared with SVMs in the stress/calm identification task. Moreover, a series of video clips evoking calm and stress conditions have been viewed by 147 volunteers in order to validate the classification results. The highest F1-score obtained for SVMs and D-SVMs are 83% and 92%, respectively. These results demonstrate that not only classical SVMs are appropriate for classification of biomarker signals, but D-SVMs are very competitive in comparison to other classification techniques. In addition, the results have enabled drawing useful considerations for the future use of SVMs and D-SVMs in the specific case of stress/calm identification.
ISSN:0129-0657
1793-6462
DOI:10.1142/S0129065720500318