EEG in classroom: EMD features to detect situational interest of students during learning
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Situational interest is widely explored in the psychology and education domains. It is proven to have positive effect on learning and academic achievement. Nonetheless, not much attention is given for assessing the feasibility of detecting this interest in natural classroom physiologically. Therefore, this study investigates the possibility of detecting situational interest using Electroencephalogram (EEG) in classroom. After preprocessing of EEG data, they were decomposed using Empirical Mode Decomposition (EMD). The resulted Intrinsic Mode Functions (IMFs) were ranked based on their significance using T-test and Receiver Operator Characteristics (ROC) in descending order. A matrix was constructed for all participants using the best six features from four EEG channels. These selected features were fed into Support Vector Machine (SVM) and K-Nearest Neighbor (KNN) classifiers with 10 cross validation. While SVM achieved high accuracy of 93.3% and 87.5% for two data sets using features from the four EEG channels, KNN classifier achieved high accuracy of 87.5% and 86.7% in the same datasets using single EEG channel. It is found that gamma and delta bands can be used successfully to detect situational interest of students during learning in classrooms. Furthermore, data of single EEG channel - F3 in this study- was efficient to detect student’s situational interest in simultaneous recording of EEG in classroom.
KeywordsElectroencephalogram Classroom Empirical mode decomposition Classification Situational interest levels
The authors are grateful for the advices given by Suzanne Hidi, Ulrich Schiefele and Mathew Mitchell at the beginning of experimental phase. The authors would like to thank the assistant researchers during the experiments for their effort in assuring simultaneous EEG recording from all participants. Extended thanks to Universiti Teknologi PETRONAS for the given Graduate Assistantship.
This research was funded partially by a grant from the Ministry of Higher Education Malaysia for HiCoE for CISIR [0153CA-002].
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