PC50 Stroop cost was 45 ms smaller after incongruent MC trials across disjoint color sets in two pooled runs from 52 selected ds003465 v1.0.8 participants

We tested the Stroop sequence effect in OpenNeuro ds003465 version 1.0.8. Current PC50 trials followed MC trials from a disjoint color and word set. The primary estimate combined two runs in one baseline session. It required correct current and previous responses, current time from 200 through 2,000 ms, and at least three trials in each cell. In 52 eligible people and 2,371 pairs, Stroop cost was 45.4 ms smaller after incongruent trials. The 95% person bootstrap interval was 16.4 to 75.6 ms. No feature repeated across the tested pairs. The run 2, reverse-switch, and stricter count check intervals included zero. The paired run difference interval also included zero. No person met the planned within-PC50 rule after all shared features were excluded. The evidence is a pooled behavioral association. It does not identify a causal or neural mechanism. The package preserves all source files, a trial-pair table, all planned results, bootstrap draws, source hashes, code, and reproduction steps. A separate calculation and a complete new public retrieval passed. A clean Python installation reproduced all 26 result files exactly.

Stroop task · congruency sequence effect · cognitive control · behavioral analysis · DMCC55B · OpenNeuro · stimulus feature repetition · person bootstrap