Stroop Test: Online Color Word Brain Game
Try the famous Stroop test, a quick brain game from psychology. Color words like RED and BLUE appear in a different ink color. Your job is to click the color of the ink, not the word you read. It is harder than it sounds, because your brain reads words automatically. See how many you get right in 45 seconds.
READY?
Quick answer: Press Start the test, then for each word click the button that matches its ink color (or press keys 1 to 4). Ignore what the word says. After 45 seconds you see how many you named correctly, your average reaction time, and your personal Stroop effect: how much slower you are when the word and ink clash.
How the Stroop test works
- A color word is shown in colored ink, for example the word BLUE printed in red.
- Click the ink color: in that example, red.
- Some words match their ink and some clash. Clashing words take longer because reading gets in the way.
- The difference between those two reaction times is your Stroop effect.
What is the Stroop effect?
In 1935 the American psychologist John Ridley Stroop showed that people take longer to name the ink color of a word when the word spells a different color. Reading is so automatic that the brain has to work to block it out. The test is still used in research on attention, self-control and processing speed.
| Mode | What it shows |
|---|---|
| Always matching | Your baseline speed, word and ink agree |
| Mixed (classic) | Your Stroop effect: clash time minus match time |
| Always clashing | The hardest version, pure attention control |
Tips for a better score
- Blur your focus slightly. Look at the color as a patch, not as letters.
- Use the keyboard. Keys 1 to 4 are faster than moving a mouse.
- Accuracy first. Mistakes cost more than a slightly slower answer.
This is a fun brain game, not a medical test. For more quick challenges, try the reaction time test, the times tables game or the typing test.
FAQ
What is a good Stroop test score?
Many adults name 35 to 55 colors correctly in 45 seconds, with a Stroop effect of about 50 to 150 milliseconds. Practice usually improves both.
Why are there only four colors?
Four clearly different colors make the test fair on every screen and easy to answer with keys 1 to 4.
More free games and tools
See all of them on the QuickOnlineTips free online tools page and the free online games page.