Straight answers about the platform, the science, and the results.
The Stroop effect is the mental delay that occurs when a word's meaning conflicts with its ink color — like the word RED printed in blue ink. Naming the ink color takes longer than reading the word. It has been a standard measure of selective attention since 1935. Read the full science page →
You see color words one at a time and respond to the ink color before the interval ends. Every trial is timed server-side in milliseconds; accuracy and score are tracked per session. In most modes, one mistake ends the run — so consistency matters as much as speed.
Results report your reaction time in milliseconds and your accuracy. Stroop test results include a Stroop effect analysis: your average speed on congruent versus incongruent trials and the interference between them. The Cognitive Skills Report tracks your progress across nine cognitive domains over time — the number that matters most is your own trajectory.
A progress report that tracks your training across nine cognitive skills — selective attention, inhibitory control, cognitive flexibility, processing speed, pattern recognition, visual working memory, sustained attention, problem solving, and reasoning. Each skill shows a 0–100 mastery score built from your server-verified game sessions: consistency, variety, difficulty, speed, and accuracy all count. See how the scoring works.
Inactivity decay. A skill you have not trained recently loses a few displayed points — −1 after one week, at most −15 after five weeks. Earned mastery is never deleted: your first three valid sessions back restore the lost points in 40/30/30 steps. The dashboard shows your current active mastery; your lifetime mastery only accumulates.
Yes. You can play for free every day within daily limits. A subscription unlocks additional daily play and advanced features. New cognitive games are added to the library over time.
Practicing a specific task reliably improves performance on that task — that part is well established. Whether training transfers broadly to general intelligence is genuinely debated in the research literature. IDM Stroop takes the honest position: it measures and tracks the skills you actually train, without inflated claims. Your progress is reported in milliseconds and accuracy — not hype.
Stroop Live lets you create a room, share the code, and compete in simultaneous real-time rounds — head-to-head with friends, colleagues, or anyone you dare to challenge.
The Daily Showdown is a daily live headline round at 21:00 Riyadh time. The lobby opens at 20:45, everyone plays the same 120-second round simultaneously, and the day's leaderboard is ranked immediately after. The game mode rotates daily between adaptive Stroop, Pattern Recognition, and Control & Response Speed.
Yes. The entire platform — games, dashboards, and reports — is fully bilingual in English and Arabic, with complete right-to-left support. Switch languages any time, or start directly at stroop.idm.sa/ar.
IDM Stroop stores only what is needed to run your account and track your own progress. See the terms and privacy policy in the app for details.