Tactile perception, the primary sensing channel of the tactile brain-computer interface (BCI), is a complicated process. Skin friction plays a vital role in tactile perception. This study aimed to examine the effects of skin friction on tactile P300 BCI performance. Two kinds of oddball paradigms were designed, silk-stim paradigm (SSP) and linen-stim paradigm (LSP), in which silk and linen were wrapped on target vibration motors, respectively. In both paradigms, the disturbance vibrators were wrapped in cotton. The experimental results showed that LSP could induce stronger event-related potentials (ERPs) and achieved a higher classification accuracy and information transfer rate (ITR) compared with SSP. The findings indicate that high skin friction can achieve high performance in tactile BCI. This work provides a novel research direction and constitutes a viable basis for the future tactile P300 BCI, which may benefit patients with visual impairments.

中文翻译：

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皮肤摩擦对触觉 P300 脑机接口性能的影响


触觉感知是触觉脑机接口（BCI）的主要感知通道，是一个复杂的过程。皮肤摩擦力在触觉感知中起着至关重要的作用。本研究旨在探讨皮肤摩擦对 P300 BCI 触觉性能的影响。设计了两种奇怪的范式，丝绸刺激范式（SSP）和亚麻刺激范式（LSP），其中丝绸和亚麻分别包裹在目标振动电机上。在这两种范例中，扰动振动器都包裹在棉花中。实验结果表明，与SSP相比，LSP可以诱导更强的事件相关电位（ERP），并实现更高的分类精度和信息传输率（ITR）。研究结果表明，高皮肤摩擦力可以在触觉 BCI 中实现高性能。这项工作提供了一个新颖的研究方向，并为未来的触觉 P300 BCI 奠定了可行的基础，这可能使视力障碍患者受益。