An FD rule above 0.2 mm marked more samples after failed stops in 222 AOMIC PIOP2 runs under delayed six-second windows and assumed zero-based timing

A fixed FD limit of 0.2 mm marked more scan samples after failed stops than after successful stops. The test used 222 AOMIC PIOP2 runs. Volume times started at zero. Each trial window ran from 4 to 10 seconds after face onset. The mean difference was 2.408 percentage points. The 95 percent person bootstrap interval was 1.234 to 3.618. The comparison used 7,299 stop trials, with equal weight for each person. Fixed timing, limit, adjacent volume, and task adjustment checks also gave positive differences. Coverage weights lowered the mean failed stop fraction by 0.610 percentage points. The package includes exact event records, selected motion text values, source hashes, retrieval code, trial records, all 20,000 resampling draws, figures, and independent checks. All nine numerical output files matched a repeat run byte for byte. The result measures sample coverage under the tested rule. It does not measure a brain contrast or a causal effect. The stored volume timing is assumed. The source processing version is unresolved.

framewise displacement · motion censoring · stop-signal task · sample coverage · fMRI · AOMIC-PIOP2 · bootstrap · response inhibition