This is the dataset of "Efficient dual-frequency SSVEP brain-computer interface system exploiting interocular visual resource disparities" cited as: Yike Sun, Yuhan Li, Yuzhen Chen, Chen Yang, Jingnan Sun, Liyan Liang, Xiaogang Chen, Xiaorong Gao, Efficient dual-frequency SSVEP brain-computer interface system exploiting interocular visual resource disparities, Expert Systems with Applications, 2024, 124144, ISSN 0957-4174, https://doi.org/10.1016/j.eswa.2024.124144. (https://www.sciencedirect.com/science/article/pii/S0957417424010108) contact: Dr. Yike Sun, email: sun.yk.bci@outlook.com download: http://bci.med.tsinghua.edu.cn/ "Data for Efficient dual-frequency SSVEP brain-computer interface system"