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Classification of alcoholic EEG signals using wavelet scattering transform-based features

Following the research question and the relevant dataset, feature extraction is the most important component of machine learning and data science pipelines. The wavelet scattering transform (WST) is a recently developed knowledge-based feature extraction technique and is structurally like a convolut...

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Bibliographic Details
Published in:Computers in biology and medicine 2021-12, Vol.139, p.104969-104969, Article 104969
Main Authors: Buriro, Abdul Baseer, Ahmed, Bilal, Baloch, Gulsher, Ahmed, Junaid, Shoorangiz, Reza, Weddell, Stephen J., Jones, Richard D.
Format: Article
Language:English
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Summary:Following the research question and the relevant dataset, feature extraction is the most important component of machine learning and data science pipelines. The wavelet scattering transform (WST) is a recently developed knowledge-based feature extraction technique and is structurally like a convolutional neural network (CNN). It preserves information in high-frequency, is insensitive to signal deformations, and generates low variance features of real-valued signals generally required in classification tasks. With data from a publicly-available UCI database, we investigated the ability of WST-based features extracted from multichannel electroencephalogram (EEG) signals to discriminate 1.0-s EEG records of 20 male subjects with alcoholism and 20 male healthy subjects. Using record-wise 10-fold cross-validation, we found that WST-based features, inputted to a support vector machine (SVM) classifier, were able to correctly classify all alcoholic and normal EEG records. Similar performances were achieved with 1D CNN. In contrast, the highest independent-subject-wise mean 10-fold cross-validation performance was achieved with WST-based features fed to a linear discriminant (LDA) classifier. The results achieved with two 10-fold cross-validation approaches suggest that the WST together with a conventional classifier is an alternative to CNN for classification of alcoholic and normal EEGs. WST-based features from occipital and parietal regions were the most informative at discriminating between alcoholic and normal EEG records. •WST-based EEG features were explored for classification of alcoholics.•Evaluations were based on record- and subject-wise 10-fold cross-validations.•WST-based features and a conventional classifier is a compelling alternative to CNN.•The most informative WST features correspond to occipital and parietal regions.
ISSN:0010-4825
1879-0534
DOI:10.1016/j.compbiomed.2021.104969