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Sensors
Volume 22
Issue 15
10.3390/s22155813
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Article

Selecting the Most Important Features for Predicting Mild Cognitive Impairment from Thai Verbal Fluency Assessments

by
Suppat Metarugcheep
1,
Proadpran Punyabukkana
1,*,
Dittaya Wanvarie
2,
Solaphat Hemrungrojn
3,4,
Chaipat Chunharas
5,6 and
Ploy N. Pratanwanich
2,7
1
Department of Computer Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
2
Department of Mathematics and Computer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
3
Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
4
Cognitive Fitness and Biopsychological Technology Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
5
Cognitive Clinical & Computational Neuroscience Research Unit, Department of Internal Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
6
Chula Neuroscience Center, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
7
Chula Intelligent and Complex Systems Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
*
Author to whom correspondence should be addressed.
Academic Editor: Marcin Woźniak
Sensors 2022, 22(15), 5813; https://doi.org/10.3390/s22155813
Received: 19 June 2022 / Revised: 22 July 2022 / Accepted: 23 July 2022 / Published: 3 August 2022
(This article belongs to the Special Issue Advanced Computational Intelligence for Object Detection, Feature Extraction and Recognition in Smart Sensor Environments 2021-2022)
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Abstract

Mild cognitive impairment (MCI) is an early stage of cognitive decline or memory loss, commonly found among the elderly. A phonemic verbal fluency (PVF) task is a standard cognitive test that participants are asked to produce words starting with given letters, such as “F” in English and “ก” /k/ in Thai. With state-of-the-art machine learning techniques, features extracted from the PVF data have been widely used to detect MCI. The PVF features, including acoustic features, semantic features, and word grouping, have been studied in many languages but not Thai. However, applying the same PVF feature extraction methods used in English to Thai yields unpleasant results due to different language characteristics. This study performs analytical feature extraction on Thai PVF data to classify MCI patients. In particular, we propose novel approaches to extract features based on phonemic clustering (ability to cluster words by phonemes) and switching (ability to shift between clusters) for the Thai PVF data. The comparison results of the three classifiers revealed that the support vector machine performed the best with an area under the receiver operating characteristic curve (AUC) of 0.733 (N = 100). Furthermore, our implemented guidelines extracted efficient features, which support the machine learning models regarding MCI detection on Thai PVF data. View Full-Text
Keywords: MoCA; mild cognitive impairment; phonemic verbal fluency; feature extraction; silence-based feature; similarity-based feature; phonemic clustering; switching; classification MoCA; mild cognitive impairment; phonemic verbal fluency; feature extraction; silence-based feature; similarity-based feature; phonemic clustering; switching; classification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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MDPI and ACS Style

Metarugcheep, S.; Punyabukkana, P.; Wanvarie, D.; Hemrungrojn, S.; Chunharas, C.; Pratanwanich, P.N. Selecting the Most Important Features for Predicting Mild Cognitive Impairment from Thai Verbal Fluency Assessments. Sensors 2022, 22, 5813. https://doi.org/10.3390/s22155813

AMA Style

Metarugcheep S, Punyabukkana P, Wanvarie D, Hemrungrojn S, Chunharas C, Pratanwanich PN. Selecting the Most Important Features for Predicting Mild Cognitive Impairment from Thai Verbal Fluency Assessments. Sensors. 2022; 22(15):5813. https://doi.org/10.3390/s22155813

Chicago/Turabian Style

Metarugcheep, Suppat, Proadpran Punyabukkana, Dittaya Wanvarie, Solaphat Hemrungrojn, Chaipat Chunharas, and Ploy N. Pratanwanich. 2022. "Selecting the Most Important Features for Predicting Mild Cognitive Impairment from Thai Verbal Fluency Assessments" Sensors 22, no. 15: 5813. https://doi.org/10.3390/s22155813

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