Recorded-zero STOP removal decreases the minimum number of response removals in 149 of 232 selected ds000030 version 1.0.0 runs.

In 232 paired UCLA Consortium for Neuropsychiatric Phenomics ds000030 version 1.0.0 task runs, removing recorded-zero STOP rows decreased the minimum number of further response-row removals needed to change the GO-versus-STOP mean reaction-time check in 149 runs (71 scanner, 78 training). It stayed the same in 75 and increased in 8; scanner sub-11052 changed from 24 to 54. Each run was evaluated before and after removing all STOP rows with StopSignalDelay == 0, then all permitted allocations of positive-reaction-time GO and STOP response removals were enumerated while omission and response-fraction rules remained satisfactory. Exact integer arithmetic retained source decimal values. A second independent program agreed on all 468,121 allocation limits, 663 minimum-allocation examples, paired records and summary counts; the code also matched the specified scope of 253 prior run rows. These are exact results for fixed recorded tables and specified rules, not biological causes, population estimates, or evidence of physical cue timing, model validity, repeat-session reliability, or sampling uncertainty. Removal is not recommended as data correction. The comparison excludes nine prior mean-check changes and two fraction-rule changes, and several caveats limit interpretation.

stop-signal task · reaction time · response removal · recorded-zero delay · reproducibility · UCLA Consortium for Neuropsychiatric Phenomics · ds000030