Gaze-independent BCI-spelling using rapid serial visual presentation (RSVP)
Gaze-independent BCI-spelling using rapid serial visual presentation (RSVP)
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DOI：
10.1016/j.clinph.2012.12.050
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发表时间：
2013-05-01
影响因子：
4.7
通讯作者：
Blankertz, Benjamin
中科院分区：
文献类型：
--
作者：
Acqualagna, Laura;Blankertz, Benjamin
目的：脑机接口（BCI）拼写器是神经退行性疾病患者在计算机应用中选择符号的一种通信设备。对于无法明显注视目标符号的患者，培养不受注视变化影响的拼写能力至关重要。在当前的在线研究中，我们调查了快速连续视觉呈现（RSVP）作为心理打字的范式。方法：对三种条件下的RSVP拼写者进行了刺激发生异步性（SOA）和颜色特征使用的研究。在同一显示位置，以伪随机顺序依次呈现30个符号的词汇表。结果：所有12名参与者都能成功操作RSVP拼写器。结果表明，在最佳条件下，平均在线拼写率为1.43 symb/min，平均符号选择准确率为94.8%。结论：RSVP是一种很有前途的脑机接口拼写范式，其表现可以与文献中最快的不依赖注视的拼写者相媲美。意义：RSVP拼写器不需要将目光转移到不同的目标位置，并且可以通过非空间视觉注意进行操作，因此可以认为它可以作为一种有效的范例应用于眼运动控制障碍患者。(C) 2013年国际临床神经生理学联合会。爱思唯尔爱尔兰有限公司出版。版权所有。
Objective: A Brain Computer Interface (BCI) speller is a communication device, which can be used by patients suffering from neurodegenerative diseases to select symbols in a computer application. For patients unable to overtly fixate the target symbol, it is crucial to develop a speller independent of gaze shifts. In the present online study, we investigated rapid serial visual presentation (RSVP) as a paradigm for mental typewriting.Methods: We investigated the RSVP speller in three conditions, regarding the Stimulus Onset Asynchrony (SOA) and the use of color features. A vocabulary of 30 symbols was presented one-by-one in a pseudo random sequence at the same location of display.Results: All twelve participants were able to successfully operate the RSVP speller. The results show a mean online spelling rate of 1.43 symb/min and a mean symbol selection accuracy of 94.8% in the best condition.Conclusion: We conclude that the RSVP is a promising paradigm for BCI spelling and its performance is competitive with the fastest gaze-independent spellers in literature.Significance: The RSVP speller does not require gaze shifts towards different target locations and can be operated by non-spatial visual attention, therefore it can be considered as a valid paradigm in applications with patients for impaired oculo-motor control. (C) 2013 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.