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http://dx.doi.org/10.3745/KTCCS.2020.9.11.265

Prediction of the Following BCI Performance by Means of Spectral EEG Characteristics in the Prior Resting State  

Kang, Jae-Hwan (동의대학교 인공지능 그랜드ICT 연구센터)
Kim, Sung-Hee (동의대학교 산업ICT기술공학과)
Youn, Joosang (동의대학교 산업ICT기술공학과)
Kim, Junsuk (동의대학교 산업ICT기술공학과)
Publication Information
KIPS Transactions on Computer and Communication Systems / v.9, no.11, 2020 , pp. 265-272 More about this Journal
Abstract
In the research of brain computer interface (BCI) technology, one of the big problems encountered is how to deal with some people as called the BCI-illiteracy group who could not control the BCI system. To approach this problem efficiently, we investigated a kind of spectral EEG characteristics in the prior resting state in association with BCI performance in the following BCI tasks. First, spectral powers of EEG signals in the resting state with both eyes-open and eyes-closed conditions were respectively extracted. Second, a convolution neural network (CNN) based binary classifier discriminated the binary motor imagery intention in the BCI task. Both the linear correlation and binary prediction methods confirmed that the spectral EEG characteristics in the prior resting state were highly related to the BCI performance in the following BCI task. Linear regression analysis demonstrated that the relative ratio of the 13 Hz below and above the spectral power in the resting state with only eyes-open, not eyes-closed condition, were significantly correlated with the quantified metrics of the BCI performance (r=0.544). A binary classifier based on the linear regression with L1 regularization method was able to discriminate the high-performance group and low-performance group in the following BCI task by using the spectral-based EEG features in the precedent resting state (AUC=0.817). These results strongly support that the spectral EEG characteristics in the frontal regions during the resting state with eyes-open condition should be used as a good predictor of the following BCI task performance.
Keywords
Electroencephalograpy; Brain Computer Interface; Convolution Neural Network; Lasso;
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