文献类型：期刊文献

英文题名：The Changing Face of P300 BCIs: A Comparison of Stimulus Changes in a P300 BCI Involving Faces, Emotion, and Movement

作者：Jin, Jing[1];Allison, Brendan Z.[2,5];Kaufmann, Tobias[3];Kuebler, Andrea[3];Zhang, Yu[1,4];Wang, Xingyu[1];Cichocki, Andrzej[4]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Shanghai 200237, Peoples R China;[2]Graz Univ Technol, Inst Knowledge Discovery, Lab Brain Comp Interfaces, A-8010 Graz, Austria;[3]Univ Wurzburg, Dept Psychol 1, Wurzburg, Germany;[4]RIKEN, Brain Sci Inst, Lab Adv Brain Signal Proc, Wako, Saitama, Japan;[5]Univ Calif San Diego, Dept Cognit Sci, Cognit Neurosci Lab, La Jolla, CA 92093 USA

年份：2012

卷号：7

期号：11

外文期刊名：PLOS ONE

收录：;WOS:【SSCI(收录号:WOS:000311929800031)，SCI-EXPANDED(收录号:WOS:000311929800031)】；

基金：This work was supported in part by the Grant National Natural Science Foundation of China, under Grant Numbers 61074113 and 61203127, and supported in part by Shanghai Leading Academic Discipline Project, Project Number B504. This work was also supported by the Information and Communication Technologies Collaborative Project action "BrainAble" within the Seventh Framework of the European Commission, Project number ICT-2010-247447, and Fundamental Research Funds for the Central Universities, WH1114038. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

摘要：Background: One of the most common types of brain-computer interfaces (BCIs) is called a P300 BCI, since it relies on the P300 and other event-related potentials (ERPs). In the canonical P300 BCI approach, items on a monitor flash briefly to elicit the necessary ERPs. Very recent work has shown that this approach may yield lower performance than alternate paradigms in which the items do not flash but instead change in other ways, such as moving, changing colour or changing to characters overlaid with faces. Methodology/Principal Findings: The present study sought to extend this research direction by parametrically comparing different ways to change items in a P300 BCI. Healthy subjects used a P300 BCI across six different conditions. Three conditions were similar to our prior work, providing the first direct comparison of characters flashing, moving, and changing to faces. Three new conditions also explored facial motion and emotional expression. The six conditions were compared across objective measures such as classification accuracy and bit rate as well as subjective measures such as perceived difficulty. In line with recent studies, our results indicated that the character flash condition resulted in the lowest accuracy and bit rate. All four face conditions (mean accuracy >91%) yielded significantly better performance than the flash condition (mean accuracy = 75%). Conclusions/Significance: Objective results reaffirmed that the face paradigm is superior to the canonical flash approach that has dominated P300 BCIs for over 20 years. The subjective reports indicated that the conditions that yielded better performance were not considered especially burdensome. Therefore, although further work is needed to identify which face paradigm is best, it is clear that the canonical flash approach should be replaced with a face paradigm when aiming at increasing bit rate. However, the face paradigm has to be further explored with practical applications particularly with locked-in patients.