文献类型：期刊文献

英文题名：Effect of a combination of flip and zooming stimuli on the performance of a visual brain-computer interface for spelling

作者：Cheng, Jiao[1];Jin, Jing[1];Daly, Ian[3];Zhang, Yu[2];Wang, Bei[1];Wang, Xingyu[1];Cichocki, Andrzej[4,5,6]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, Shanghai, Peoples R China;[2]Stanford Univ, Dept Psychiat & Behav Sci, Stanford, CA 94305 USA;[3]Univ Essex, Sch Comp Sci & Elect Engn, Brain Comp Interfaces & Neural Engn Lab, Wivenhoe Pk, Colchester CO4 3SQ, Essex, England;[4]RIKEN, Lab Adv Brain Signal Proc, Brain Sci Inst, Wako, Saitama, Japan;[5]Skolkovo Inst Sci & Technol, Moscow, Russia;[6]Nicolaus Copernicus Univ UMK, Torun, Poland

年份：2019

卷号：64

期号：1

起止页码：29

外文期刊名：BIOMEDICAL ENGINEERING-BIOMEDIZINISCHE TECHNIK

收录：;EI(收录号：20180804818588);WOS:【SCI-EXPANDED(收录号:WOS:000458495100002)】；

基金：This work was supported by the Grant National Natural Science Foundation of China, under Grant Nos. 91420302, 61573142, 2017YFB13003002. This work was also supported by the Programme of Introducing Talents of Discipline to Universities (the 111 project) under Grant B17017, the Fundamental Research Funds for the Central Universities (WH1516018, 222201717006) and Shanghai Chenguang Program under Grant 14CG31.

语种：英文

外文关键词：brain-computer interface (BCI) systems; combined paradigm; flip stimulus; zooming action

摘要：Brain-computer interface (BCI) systems can allow their users to communicate with the external world by recognizing intention directly from their brain activity without the assistance of the peripheral motor nervous system. The P300-speller is one of the most widely used visual BCI applications. In previous studies, a flip stimulus (rotating the background area of the character) that was based on apparent motion, suffered from less refractory effects. However, its performance was not improved significantly. In addition, a presentation paradigm that used a "zooming" action (changing the size of the symbol) has been shown to evoke relatively higher P300 amplitudes and obtain a better BCI performance. To extend this method of stimuli presentation within a BCI and, consequently, to improve BCI performance, we present a new paradigm combining both the flip stimulus with a zooming action. This new presentation modality allowed BCI users to focus their attention more easily. We investigated whether such an action could combine the advantages of both types of stimuli presentation to bring a significant improvement in performance compared to the conventional flip stimulus. The experimental results showed that the proposed paradigm could obtain significantly higher classification accuracies and bit rates than the conventional flip paradigm (p<0.01).