OcularLDT
[, presented word by word via rapid serial visual presentation. It is part of the BCCWJ-Brain collection, which also includes fMRI and MEG datasets acquired from separate participant groups using the same stimuli, enabling cross-modal comparisons of language processing with complementary spatial and temporal resolution.
[ with 63-channel recordings at 250 Hz sampling rate. Preprocessed data includes downsampling, filtering, and baseline correction. The original study reported 97% accuracy on the Center Speller variant.
[ recordings from 13 healthy subjects performing a visual matrix speller task using a calibrationless brain-computer interface approach. The study introduces learning from label proportions (LLP), an unsupervised classification method that exploits known target/non-target stimulus ratios to enable online BCI operation without prior calibration. Subjects performed copy-spelling tasks using a 6×7 character grid across three sessions, achieving 84.5% character accuracy without labeled training data.