Every session played on stroop.idm.sa feeds a growing dataset. This page publishes the aggregate picture: how real players actually behave under Stroop interference.
How large is the Stroop effect in real players? Across 25,559 valid trials recorded on stroop.idm.sa, incongruent Stroop trials took 96 ms longer than congruent trials — a 7.3% reaction-time cost — while accuracy fell from 98.6% to 95.0%. The classic interference effect, measured live.
202 email-verified · 177 have played at least one session.
Across all six game modes since 23 June 2026.
Individual stimulus decisions, recorded and validated on the server.
Correct answers across every trial, every mode.
These numbers come from the two classic Stroop modes (Stable and Adaptive), counting only valid, completed sessions.
Average reaction time when word and ink color match · 12,790 trials · 98.6% correct.
Average reaction time when word and ink color conflict · 12,769 trials · 95.0% correct.
Incongruent trials are slower, and accuracy drops 3.6 percentage points — the classic Stroop effect, live.
4,646 trials · 53 players · 1,389 → 1,539 ms.
11,608 trials · 57 players · 1,298 → 1,373 ms.
7,472 trials · 29 players · 1,329 → 1,417 ms.
Age bands with too few players (under 20; 50 and over) are excluded to keep the numbers meaningful. These are descriptive observations from an online platform, not clinical norms.
Aggregate data from stroop.idm.sa, snapshot 1 September 2026 (Asia/Riyadh). You may cite these figures with attribution to stroop.idm.sa. The snapshot is refreshed periodically as the dataset grows.
Play a free session — the same measurements behind these statistics, for your own eyes.