Flashing characters with famous faces improves ERP-based brain-computer interface performance
Flashing characters with famous faces improves ERP-based brain-computer interface performance
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DOI：
10.1088/1741-2560/8/5/056016
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发表时间：
2011-10-01
影响因子：
4
通讯作者：
Kuebler, A.
中科院分区：
文献类型：
--
作者：
Kaufmann, T.;Schulz, S. M.;Kuebler, A.
目前，基于事件相关电位(ERP)的拼写设备，通常被称为P300-Speller，是最常用的脑机接口(BCI)，用于加强言语或运动功能受损患者的沟通。在众多改进中，一个最核心的特点几乎没有受到关注，那就是优化用于引发ERP的刺激。因此，我们将P300-Speller的表现与标准刺激(闪现字符)和刺激的表现进行了比较，这些刺激由于心理上的突显而以诱发特别强的ERP而闻名，即闪现熟悉的面孔透明地叠加在字符上。我们的结果不仅表明对熟悉的面孔反应的事件相关电位显著增加，而且由于正确字符分类所需的刺激序列显着减少，也提高了P300-Speller的成绩。这些发现证明了一种很有前途的新方法，可以提高脑-机接口增强的交流的速度，从而提高与广泛使用的P300-Speller的交流的流畅性。
Currently, the event-related potential (ERP)-based spelling device, often referred to as P300-Speller, is the most commonly used brain-computer interface (BCI) for enhancing communication of patients with impaired speech or motor function. Among numerous improvements, a most central feature has received little attention, namely optimizing the stimulus used for eliciting ERPs. Therefore we compared P300-Speller performance with the standard stimulus (flashing characters) against performance with stimuli known for eliciting particularly strong ERPs due to their psychological salience, i.e. flashing familiar faces transparently superimposed on characters. Our results not only indicate remarkably increased ERPs in response to familiar faces but also improved P300-Speller performance due to a significant reduction of stimulus sequences needed for correct character classification. These findings demonstrate a promising new approach for improving the speed and thus fluency of BCI-enhanced communication with the widely used P300-Speller.