All 12 age slopes are more than zero after zero or one STOP record removal for each of 122 ds00030 CONTROL participants.

This fixed-sample sensitivity analysis calculated stop-signal reaction time (SSRT) age-slope limits after removing zero or one of 32 STOP records for each of 122 CONTROL participants in OpenNeuro ds000030 version 1.0.0. The analyzed subset contains 96 GO and 32 STOP records per participant before removal; the sample spans ages 21–50 years. We used two GO quantile rules, three recorded-delay rules, and age-only or age-and-gender ordinary least squares models. Exact rational arithmetic gave 12 baseline slopes and exact finite-data endpoints. All 12 minimum slopes were above zero; the smallest was 0.2675734363804475 ms/year. In the primary age-only, rank-quantile, hybrid-delay calculation, the baseline slope was 1.3922369954277685 ms/year and the limits were 0.8032057077018523 to 2.0364420027232684 ms/year when one STOP record could be removed per participant. These are deterministic bounds for the specified sample, score definitions, fixed membership, and removal rule. They are not confidence intervals, do not establish measurement validity or stopping-model assumptions, and do not imply that every value between the endpoints is attainable.

stop-signal task · stop-signal reaction time · age slope · sensitivity analysis · fixed-design bounds · reaction time · OpenNeuro ds000030