Expectation arrays have opposite task labels in 12 ds004295 v1.0.0 records under the documented event codes

We checked expectation arrays in OpenNeuro ds004295 version 1.0.0 against the documented event codes. The shared MATLAB file has 23 records. Its expectation arrays have opposite task labels in all 12 records that start with the punishment task. The feedback arrays already match the task events. Exchanging the two expectation arrays in those records removes all 4,412 rating disagreements across 12,880 trials. The correction changes 3,766 prediction error inputs after the shared EEG trial exclusions. The correlation between source and corrected inputs has a median of -0.01584 in the affected feedback groups. A secondary test used 14,000 complete trials from 25 participants. A probability map learned from other participants reduced Brier score from 0.30441 to 0.23840. Its gain over a constant outcome-rate estimate was only 0.00091. The package preserves the original source files, corrected trial data, four verified MATLAB arrays, source hashes, code, bootstrap draws, and reproduction instructions. Source checks, numerical checks, and a fresh-source replay passed. The finding uses the event-code definitions as its task reference. It applies to the archived files. No EEG signal was analyzed, and no published EEG conclusion was retested.

expectation ratings · task labels · event data · reward learning · threat avoidance · Brier score · prediction error · data audit