The BCI Challenge @ NER 2015 was proposed by members of the BCI-LIFT consortium. The goal was to detect errors in a brain-computer interaction, directly from the brain signals, in a P300 spelling task. The dataset comprises 26 subjects: 16 were in the training set, and 10 were in the testing set..
BCI Challenge webpage on Kaggle: https://www.kaggle.com/c/inria-bci-challenge
NEW – JUNE 2015: the true labels are available here: true_labels.csv