文献类型：期刊文献

英文题名：An improved P300 pattern in BCI to catch user's attention

作者：Jin, Jing[1];Zhang, Hanhan[1];Daly, Ian[2];Wang, Xingyu[1];Cichocki, Andrzej[3,4,5]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, Shanghai, Peoples R China;[2]Univ Essex, Wivenhoe Pk, Colchester CO4 3SQ, Essex, England;[3]RIKEN, Brain Sci Inst, Lab Adv Brain Signal Proc, Wako, Saitama, Japan;[4]Skolkovo Inst Sci & Technol, Moscow, Russia;[5]Nicolaus Copernicus Univ UMK, Torun, Poland

年份：2017

卷号：14

期号：3

外文期刊名：JOURNAL OF NEURAL ENGINEERING

收录：;EI(收录号：20172403764489);WOS:【SSCI(收录号:WOS:000398779800001)，SCI-EXPANDED(收录号:WOS:000398779800001)】；

基金：This work was supported in part by the Grant National Natural Science Foundation of China, under Grant Nos. 91420302, 61573142, 61203127 and 61305028. This work was also supported by the Fundamental Research Funds for the Central Universities (WG1414005, WH1314023, and WH1516018) and Shanghai Chenguang Program under Grant 14CG31.

语种：英文

外文关键词：brain computer interface; P300; honeycomb shaped stimulus

摘要：Objective. Brain-computer interfaces (BCIs) can help patients who have lost control over most muscles but are still conscious and able to communicate or interact with the environment. One of the most popular types of BCI is the P300-based BCI. With this BCI, users are asked to count the number of appearances of target stimuli in an experiment. To date, the majority of visual P300-based BCI systems developed have used the same character or picture as the target for every stimulus presentation, which can bore users. Consequently, users attention may decrease or be negatively affected by adjacent stimuli. Approach. In this study, a new stimulus is presented to increase user concentration. Honeycomb-shaped figures with 1-3 red dots were used as stimuli. The number and the positions of the red dots in the honeycomb-shaped figure were randomly changed during BCI control. The user was asked to count the number of the dots presented in each flash instead of the number of times they flashed. To assess the performance of this new stimulus, another honeycomb-shaped stimulus, without red dots, was used as a control condition. Main results. The results showed that the honeycomb-shaped stimuli with red dots obtained significantly higher classification accuracies and information transfer rates (p < 0.05) compared to the honeycomb-shaped stimulus without red dots. Significance. The results indicate that this proposed method can be a promising approach to improve the performance of the BCI system and can be an efficient method in daily application.