moabb.datasets.BNCI2014_002#

class moabb.datasets.BNCI2014_002[source]#

BNCI 2014-002 Motor Imagery dataset.

PapersWithCode leaderboard: https://paperswithcode.com/dataset/bnci2014-002-moabb-1

Dataset summary

#Subj	14
#Chan	15
#Classes	2
#Trials / class	80
Trials length	5 s
Freq	512 Hz
#Sessions	1
#Runs	8
Total_trials	17920

Participants

Population: healthy
BCI experience: naive

Equipment

Amplifier: g.tec
Electrodes: Ag/AgCl
Montage: laplacian
Reference: left mastoid

Preprocessing

Data state: raw with online filtering applied
Bandpass filter: 0.1-200 Hz
Steps: Bandpass filtering, Notch filtering, Automated outlier rejection, Laplacian spatial filtering, DFT for PSD estimation
Re-reference: car

Data Access

DOI: 10.1515/bmt-2014-0117

Experimental Protocol

Paradigm: imagery
Feedback: none
Stimulus: cursor_feedback

Motor Imagery Dataset from [1].

Dataset description

The session consisted of eight runs, five of them for training and three with feedback for validation. One run was composed of 20 trials. Taken together, we recorded 50 trials per class for training and 30 trials per class for validation. Participants had the task of performing sustained (5 seconds) kinaesthetic motor imagery (MI) of the right hand and of the feet each as instructed by the cue. At 0 s, a white colored cross appeared on screen, 2 s later a beep sounded to catch the participant’s attention. The cue was displayed from 3 s to 4 s. Participants were instructed to start with MI as soon as they recognized the cue and to perform the indicated MI until the cross disappeared at 8 s. A rest period with a random length between 2 s and 3 s was presented between trials. Participants did not receive feedback during training. Feedback was presented in form of a white coloured bar-graph. The length of the bar-graph reflected the amount of correct classifications over the last second. EEG was measured with a biosignal amplifier and active Ag/AgCl electrodes (g.USBamp, g.LADYbird, Guger Technologies OG, Schiedlberg, Austria) at a sampling rate of 512 Hz. The electrodes placement was designed for obtaining three Laplacian derivations. Center electrodes at positions C3, Cz, and C4 and four additional electrodes around each center electrode with a distance of 2.5 cm, 15 electrodes total. The reference electrode was mounted on the left mastoid and the ground electrode on the right mastoid. The 13 participants were aged between 20 and 30 years, 8 naive to the task, and had no known disabilities.

References

[1]

Scherer, R., Faller, J., Balderas, D., Friedrich, E. V., & Müller-Putz, G. (2015). Brain-computer interfacing: more than the sum of its parts. Soft Computing, 19(11), 3173-3186. https://doi.org/10.1007/s00500-014-1547-8

Notes

Note

BNCI2014_002 was previously named BNCI2014002. BNCI2014002 will be removed in version 1.1.

Added in version 0.4.0.