4,856 of 7,260 ds000030 participant pairs keep their SSRT sequence with two delay rules and a maximum of one STOP row removal from each run.

In 121 control participants from OpenNeuro ds000030 snapshot 1.0.0, we compared stop-signal reaction time (SSRT) ordering for all 7,260 participant pairs. We used two delay rules: recorded delays, and recorded delays with exact zeros replaced by planned delays. For each participant, we compared the full 32-STOP-row score with scores after removing each STOP row, while keeping all GO rows. Under the primary limit of one removal per run, 4,856 pairs (66.887052%) kept the same strict sequence under both rules and all permitted removals; 639 had opposite fixed sequences under the two rules, and 1,765 lacked a fixed sequence under at least one rule. Without removals, the rules gave opposite sequences for 1,384 pairs. Linear-quantile and one-removal-total sensitivity results are also reported. Exact rational arithmetic was used. These finite within-record perturbations do not estimate sampling uncertainty, biological causes, sound-onset timing, model validity, or separate-session reliability; pair counts are dependent because participants recur across pairs. The package preserves source hashes, URLs, code, outputs, checks, and limitations.

stop-signal reaction time · SSRT · participant ordering · reaction time · sensitivity analysis · OpenNeuro ds000030 · exact arithmetic