All 50 ds003825 v1.2.0 event tables store nominal 50 ms durations, and recorded image trigger intervals range from 43 to 3073 ms

We audited all 50 released event tables in OpenNeuro ds003825 v1.2.0. They contain 1,217,712 image rows. Every stored duration is 50, and the source metadata gives milliseconds as the unit. Reading this value as seconds makes 99.9970% of adjacent image intervals overlap. Conversion to the declared unit gives zero overlap. All rows match recorded onset and offset triggers. Trigger differences range from 43 to 3073 ms. Of all rows, 4.0685% have a trigger difference more than 1 ms from nominal 50 ms. All 43 or 44 ms differences occur in five participants. The package preserves exact timing fields, trigger durations, source hashes, checked conversion code, results, and repeat instructions. The test covers timing records. It does not test EEG responses or exact screen light timing.

EEG · event timing · OpenNeuro · BIDS · duration units · visual neuroscience · BrainVision markers