Phyo Wai Aung Aung, Lee Jun Cong, Yang Tao, So Rosa, Guan Cuntai
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:3019-3022. doi: 10.1109/EMBC44109.2020.9176678.
Steady-State Visual Evoked Potentials (SSVEP) Brain-Computer Interface (BCI) relies on overt spatial attention to exhibit reliable steady-state responses. There is a promising potential to employ the SSVEP paradigm in with vision research and clinical use, for instance, for visual field assessment. In this study, we investigate the SSVEP characteristics with different spatial attention, the different number of stimuli, and different viewing/visual angles. We collected data from eleven subjects in three experiment sessions, lasting about forty minutes, including the setup and calibration. Our evaluation results show similar SSVEP responses between overt and covert attention in multiple stimuli scenarios in most of the visual angles. We do not find any significant differences in SSVEP responses in visual angles between single and multi stimuli in covert attention. From this study, we found that reliable SSVEP responses can be achieved with covert spatial attention regardless of visual angles and stimulus spatial resolution.
稳态视觉诱发电位（SSVEP）脑机接口（BCI）依靠明显的空间注意力来展现可靠的稳态反应。将SSVEP范式应用于视觉研究和临床用途（例如视野评估）具有很大的潜力。在本研究中，我们调查了不同空间注意力、不同刺激数量以及不同观看/视角下的SSVEP特征。我们在三个实验环节中收集了11名受试者的数据，包括设置和校准，历时约40分钟。我们的评估结果显示，在大多数视角下的多个刺激场景中，明显注意力和隐蔽注意力之间的SSVEP反应相似。在隐蔽注意力下，我们未发现单刺激和多刺激在视角方面的SSVEP反应有任何显著差异。通过本研究，我们发现，无论视角和刺激空间分辨率如何，隐蔽空间注意力均可实现可靠的SSVEP反应。
