Modified Support Vector Machine for Detecting Stress Level Using EEG Signals

• Published in: Computational intelligence and neuroscience Vol. 2020; no. 2020; pp. 1 - 14
• Main Authors: Gupta, Richa, Agarwal, Parul, Alam, M. Afshar
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 2020; Hindawi; John Wiley & Sons, Inc
• Subjects: Accuracy; Algorithms; Brain research; Cerebrum; Classification; Discriminant analysis; EEG; Electroencephalography; Feature extraction; Machine learning; Mathematical optimization; Methods; Optimization; Physiology; Psychological stress; Stress; Stress (Psychology); Support vector machines; Wavelet transforms
• ISSN: 1687-5265; 1687-5273; 1687-5273
• DOI: 10.1155/2020/8860841

Stress is categorized as a condition of mental strain or pressure approaches because of upsetting or requesting conditions. There are various sources of stress initiation. Researchers consider human cerebrum as the primary wellspring of stress. To study how each individual encounters stress in different forms, researchers conduct surveys and monitor it. The paper presents the fusion of 5 algorithms to enhance the accuracy for detection of mental stress using EEG signals. The Whale Optimization Algorithm has been modified to select the optimal kernel in the SVM classifier for stress detection. An integrated set of algorithms (NLM, DCT, and MBPSO) has been used for preprocessing, feature extraction, and selection. The proposed algorithm has been tested on EEG signals collected from 14 subjects to identify the stress level. The proposed approach was validated using accuracy, sensitivity, specificity, and F1 score with values of 96.36%, 96.84%, 90.8%, and 97.96% and was found to be better than the existing ones. The algorithm may be useful to psychiatrists and health consultants for diagnosing the stress level.