A Novel P300-Based Interactive Method for Virtual Reality System

In this paper, a novel P300 paradigm based on three dimensional (3D) stereo visual stimuli has been proposed to improve the classification accuracy (ACC) and the information transfer rate (ITR) of brain-computer interface (BCI) system based on virtual reality (VR), thus promoting the systematic performance. Specifically, the traditional two dimensional (2D) flashing plane has been replaced by a virtual object changing from its 2D plane to its 3D solid to construct the P300 paradigm. A set of comparative experiments have been set up in the VR system and the P300 paradigms used in the experiment are traditional 2D paradigm and the proposed 3D paradigm, respectively. Six healthy subjects participated in the experiment and the results show that the 3D paradigm proposed in this paper is effective and more suitable for VR interactive system.

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