Published March 22, 2023
| Version 01
Dataset
Open
SSVEP database elicited by four visual stimuli types
Creators
- 1. Tecnológico de Monterrey (ITESM)
Description
- The database consists of 108 electroencephalographic files from 27 participants performing a 5-target selection task.
- Each participant performed one experimental session.
- All datasets were collected on channels PO7, PO3, POz, PO4, PO8, O1, Oz, and O2, according to the 10–20 EEG electrode placement standard.
- For the visual stimuli, we consider the On-Off and Checkerboard patterns with luminance modulated by rectangular and sinusoidal functions, resulting in a total of four types of visual stimuli: Checkerboard pattern with the rectangular modulated signal (Sxx-C.txt); Checkerboard pattern with sinusoidal modulated signal (Sxx-mC.txt); On-Off pattern with sinusoidal modulated signal (Sxx-mOO.txt) and On-Off pattern with rectangular modulated signal (Sxx-OO.txt), where "Sxx" represents the subject number and 01 <= xx <= 27.
- In each file columns 1 to 8 correspond to EEG data and column 9 corresponds to the marks channel.
- Each phase of the experiment block is identified with a marker.
- The phases of one experiment trial are Fixation(201), Target Presentation(202), Preparation(203), Stimulation(101-105), and Rest(200).
- Marker numbers 101, 102, 103, 104, and 105, encodes de target frequency applied during the "Stimulation" stage in a trial. They are associated with the stimulation frequencies as follows: 101 - 24 Hz; 102 - 20 Hz; 103 - 15 Hz; 104 - 10.909 Hz and, 105 - 8.57 Hz
- Files can be easily accessible with EEG-dedicated MATLAB toolboxes, such as Fieldtrip and EEGLAB.
Files
S01-C.txt
Files
(2.4 GB)
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