BNCI 2014-004 Motor Imagery dataset

This dataset comprises EEG recordings from 9 healthy subjects performing two-class motor imagery tasks (left vs. right hand movements) as part of BCI Competition IV Dataset 2b. Data were collected across five sessions per subject: two screening sessions without feedback and three feedback sessions with visual smiley feedback. The dataset includes 3 bipolar EEG channels (C3, Cz, C4) and 3 EOG channels sampled at 250 Hz, with online bandpass (0.5-100 Hz) and notch (50 Hz) filtering applied during acquisition.