All STOP responses more than 5 ms before LadderTime have zero recorded delay in 126 CONTROL scanner runs.

This coverage audit examined 126 CONTROL scanner runs in OpenNeuro ds000030 snapshot 1.0.0. Of 4,032 STOP trials, 2,079 had responses; 2,027 were in the scope with positive reaction time and LadderTime. Among these, 274 responses occurred more than 5 ms before LadderTime, and all had recorded StopSignalDelay equal to zero. The three positive recorded-delay early responses had margins below 1 ms; none had a margin greater than 1 ms. In a separate file-order count between correct GO responses, the greater-than-5-ms scope had 86 zero-delay responses and no positive-delay comparison. No next-GO effect was calculated. These counts describe coverage in the selected tables, not sound delivery, a causal effect, a population estimate, or a stop-signal reaction-time rule. Per-trial sound onset was not measured, the common arrow onset is an assumption, and the deployed task code and event converter were unavailable. All event hashes matched fresh downloads from the pinned public source. Independent arithmetic and synthetic boundary checks agreed with the reported counts.

stop-signal task · reaction time · data coverage · OpenNeuro · event timing · CONTROL runs · behavioral audit