A P300-based brain-computer interface with stimuli on moving objects: four-session single-trial and triple-trial tests with a game-like task design.
A P300-based brain-computer interface with stimuli on moving objects: four-session single-trial and triple-trial tests with a game-like task design.
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DOI：
10.1371/journal.pone.0077755
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Kaplan AY
中科院分区：
文献类型：
--
作者：
Ganin IP;Shishkin SL;Kaplan AY
脑机接口（BCI）是一种不使用肌肉活动来控制计算机和其他设备的工具，它采用用户控制的从用户大脑记录的信号变化。最有效的非侵入性脑机接口之一是基于大脑对刺激反应的P300波，因此被称为P300脑机接口。已经提出了对该BCI的许多修改，以进一步改善BCI的特性或更好地使BCI适应各种应用。然而，在原始P300 BCI及其所有修改中，刺激的空间位置相对于彼此是固定的，这可能会对设计受该BCI控制的应用程序施加限制。我们设计并测试了一个P300 BCI，刺激呈现在以5.4°/s的速度在屏幕上自由移动的物体上。健康的参与者在四个会话内以单次试验或三次试验模式使用该BCI练习类似游戏的任务。在每一步中，参与者被要求从九个移动物体中选择一个。基于BCI的选择的平均在线准确率在三次试验模式中为81%，在单次试验模式中为65%。一个相对较高的P300振幅，观察到在大多数参与者的目标。在四个阶段中，对任务的自评兴趣很高且稳定（在单次试验和三次试验模式下练习的组中，第1/4阶段的中位数分别为79/84%和76/71%）。我们的结论是，刺激位置相对于彼此的移动可能不会阻止人们控制他们的注视有效地使用P300 BCI，例如，在机器人设备和视频游戏中。
Brain-computer interfaces (BCIs) are tools for controlling computers and other devices without using muscular activity, employing user-controlled variations in signals recorded from the user’s brain. One of the most efficient noninvasive BCIs is based on the P300 wave of the brain’s response to stimuli and is therefore referred to as the P300 BCI. Many modifications of this BCI have been proposed to further improve the BCI’s characteristics or to better adapt the BCI to various applications. However, in the original P300 BCI and in all of its modifications, the spatial positions of stimuli were fixed relative to each other, which can impose constraints on designing applications controlled by this BCI. We designed and tested a P300 BCI with stimuli presented on objects that were freely moving on a screen at a speed of 5.4°/s. Healthy participants practiced a game-like task with this BCI in either single-trial or triple-trial mode within four sessions. At each step, the participants were required to select one of nine moving objects. The mean online accuracy of BCI-based selection was 81% in the triple-trial mode and 65% in the single-trial mode. A relatively high P300 amplitude was observed in response to targets in most participants. Self-rated interest in the task was high and stable over the four sessions (the medians in the 1st/4th sessions were 79/84% and 76/71% in the groups practicing in the single-trial and triple-trial modes, respectively). We conclude that the movement of stimulus positions relative to each other may not prevent the efficient use of the P300 BCI by people controlling their gaze, e.g., in robotic devices and in video games.
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影响因子：
4
作者：
Citi, Luca;Poli, Riccardo;Cinel, Caterina
通讯作者：
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影响因子：
4
作者：
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DOI：
10.1109/tsmcb.2011.2177968
发表时间：
2012-06-01
影响因子：
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通讯作者：
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通讯作者：
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DOI：
10.1109/86.847811
发表时间：
2000-06-01
期刊：
IEEE TRANSACTIONS ON REHABILITATION ENGINEERING
影响因子：
--
作者：
Bayliss, JD;Ballard, DH
通讯作者：
Ballard, DH