Stroop Test
Ignore the word. Choose the INK COLOR as fast as you can. Complete 20 rounds.
You should click RED.
PAUSED
Press Pause again or Space to resume
Response Timeline
About the Stroop Test
The Stroop Effect (1935) demonstrates cognitive interference โ when a color word (e.g., "BLUE") is printed in a different ink color (e.g., red), naming the ink color takes longer because your brain must suppress the automatic reading response. This test measures your inhibition control and executive function.
Performance Benchmarks
| Rating | Accuracy | Avg Speed | Who Achieves This |
|---|---|---|---|
| ๐ง Genius | 95%+ | < 500ms | Peak cognitive performers |
| โก Sharp | 90%+ | < 600ms | High-focus individuals, gamers |
| ๐ Focused | 85%+ | < 700ms | Above-average cognitive control |
| โญ Good | 75%+ | < 800ms | Typical healthy adult |
| ๐ Average | 65%+ | Any | Normal, no preparation |
| ๐ Distracted | < 65% | Any | Fatigue or attention difficulties |
How to Use
- Click Start Test or press SPACE.
- Ignore what the word says โ focus on the ink color.
- Click the matching color button or press 1-4.
- Complete 20 rounds for your full score including Stroop Effect delta.
The Science
Reading is automatic for literate adults, while color naming requires conscious effort. When word and ink disagree (incongruent trials), your prefrontal cortex must suppress the reading response โ taking 50-150ms extra. The Stroop Effect (ฮ) measures this interference: lower is better.
Frequently Asked Questions
What does my Stroop Effect (ฮ) score mean?
It shows the millisecond difference between congruent and incongruent response times. A typical delta is 50-150ms. Lower means stronger executive function.
Is the Stroop Test used for ADHD diagnosis?
It's part of neuropsychological assessment batteries for ADHD, but never used alone. This online version is for entertainment and cognitive exercise only.
Can I improve with practice?
Yes. Studies show regular practice reduces the interference effect by 20-40% over 2-4 weeks. Mindfulness meditation also strengthens the relevant brain areas.