All 96 primary maximum pair sets give mean differences above zero in ds000030 1.0.0.

This fixed-data calculation tested whether permitted trial partners could reverse a prior descriptive mean difference in OpenNeuro ds000030 snapshot 1.0.0. We used 266 participants with stopsignal = 1 and the prior trial selection, six match rules, and maximum pair counts. Under the primary rule, 35 pairs in 32 participants produced assignment bounds of 97.41394164054613 to 124.86115826559514 ms across all 96 maximum pair sets. The bounds remain above zero for these selected recorded trials. They are not confidence intervals or causal effects. The primary rule uses only 35 of 199 selected class Z trials, and each rule can retain a different participant sample. Time trends, shared GO neighbors, response selection, and sound delivery remain possible influences. The calculation does not establish that the planned stop sound was delivered. It uses exact rational arithmetic and dynamic programming, with full-enumeration checks for all primary participant graphs and synthetic checks. The reported checks agree; they are from the same researcher and are not independent biological observations.

stop-signal task · trial matching · assignment bounds · reaction time · OpenNeuro · ds000030 · rational arithmetic · dynamic programming · descriptive analysis