A 1,000 ms limit changes conditional response distributions in 36 of 122 tested ds000030 control runs.

In a fixed sample of 122 control runs from OpenNeuro ds000030, applying a 1,000 ms response-time limit changed conditional GO–STOP response distributions at times up to 1,000 ms in 36 runs and changed the largest positive difference in 27. Crossing counts changed from 102 to 103: one run gained a crossing and none lost one. The all-trial comparison was unchanged at times up to 1,000 ms. In the run with the added crossing, all 93 positive GO records were labeled IncorrectResponse and JUNK; the source does not explain these labels, so they do not support a biological interpretation. A post-result check using only CorrectResponse GO records found 100 crossings under both rules among 121 defined runs, with no change in crossing status. The limit is a sensitivity rule, not a validated correction to the task record. These counts describe the archived records and do not establish biological cause, race-model failure, or an individual diagnosis.

stop-signal task · reaction time · empirical cumulative distribution · response-time limit · OpenNeuro ds000030