Separable EEG Features Induced by Timing Prediction for Active Brain-Computer Interfaces

Sensors

Shuang Liu¹  Qiangfan Meng¹  Jiayuan Meng²  Xiaolin Xiao²  Jin Han²  Minpeng Xu²  Dong Ming²  Kun Wang² 

[1] Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300000, China;College of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300000, China;

关键词: active brain-computer interfaces;    timing prediction;    discriminative canonical pattern matching (DCPM);    common spatial pattern (CSP);   

DOI  :  10.3390/s20123588

来源: DOAJ

【 摘 要 】

Brain–computer interfaces (BCI) have witnessed a rapid development in recent years. However, the active BCI paradigm is still underdeveloped with a lack of variety. It is imperative to adapt more voluntary mental activities for the active BCI control, which can induce separable electroencephalography (EEG) features. This study aims to demonstrate the brain function of timing prediction, i.e., the expectation of upcoming time intervals, is accessible for BCIs. Eighteen subjects were selected for this study. They were trained to have a precise idea of two sub-second time intervals, i.e., 400 ms and 600 ms, and were asked to measure a time interval of either 400 ms or 600 ms in mind after a cue onset. The EEG features induced by timing prediction were analyzed and classified using the combined discriminative canonical pattern matching and common spatial pattern. It was found that the ERPs in low-frequency (0~4 Hz) and energy in high-frequency (20~60 Hz) were separable for distinct timing predictions. The accuracy reached the highest of 93.75% with an average of 76.45% for the classification of 400 vs. 600 ms timing. This study first demonstrates that the cognitive EEG features induced by timing prediction are detectable and separable, which is feasible to be used in active BCIs controls and can broaden the category of BCIs.

【 授权许可】

Unknown