title: A Benchmark Dataset for SSVEP-Based Brain-Computer Interfaces.
abstract: This paper presents a benchmark steady-state visual evoked potential (SSVEP) dataset acquired with a 40-target brain- computer interface (BCI) speller. The dataset consists of 64-channel Electroencephalogram (EEG) data from 35 healthy subjects (8 experienced and 27 naïve) while they performed a cue-guided target selecting task. The virtual keyboard of the speller was composed of 40 visual flickers, which were coded using a joint frequency and phase modulation (JFPM) approach. The stimulation frequencies ranged from 8 Hz to 15.8 Hz with an interval of 0.2 Hz. The phase difference between two adjacent frequencies was . For each subject, the data included six blocks of 40 trials corresponding to all 40 flickers indicated by a visual cue in a random order. The stimulation duration in each trial was five seconds. The dataset can be used as a benchmark dataset to compare the methods for stimulus coding and target identification in SSVEP-based BCIs. Through offline simulation, the dataset can be used to design new system diagrams and evaluate their BCI performance without collecting any new data. The dataset also provides high-quality data for computational modeling of SSVEPs. The dataset is freely available fromhttp://bci.med.tsinghua.edu.cn/download.html.
authors.forename: Yijun
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Gao
authors.forename: Shangkai
authors.initials: S
authors.lastname: Gao
mesh_terms: D000293:Adolescent; D000328:Adult; D000465:Algorithms; D019985:Benchmarking; D062207:Brain-Computer Interfaces / Q000706:statistics & numerical data*; D003143:Communication Devices for People with Disabilities; D003198:Computer Simulation; D016208:Databases, Factual; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D004569:Electroencephalography; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D059629:Signal-To-Noise Ratio; D055815:Young Adult