Reaction Time Test
Click as soon as the screen turns green.
You can also start with Space / Enter
Overview
The Reaction Time Test measures how quickly you respond to a visual stimulus, a fundamental metric in cognitive science. Click as soon as the screen turns green, and your response time is measured in milliseconds. The median of 5 trials is used as your final score to eliminate outliers.
Rules
- Wait while the screen is red, then click as fast as possible when it turns green
- Clicking before the screen turns green counts as 'too early' and the trial restarts
- You complete 5 trials, and the median value becomes your final score
- You can also use the Space key to respond
Score Guide
| Score | Rating | Percentile |
|---|---|---|
| ≤ 138ms | Legendary | Top 1% |
| 139-174ms | Exceptional | Top 1-5% |
| 175-208ms | Excellent | Top 5-15% |
| 209-236ms | Great | Top 15-30% |
| 237-265ms | Above Average | Top 30-50% |
| 266-293ms | Average | Top 50-70% |
| ≥ 294ms | Below Average | Outside top 70% |
FAQ
Does the device I use affect my score?
Yes. Monitor response time and touchscreen input latency can make results differ between devices. For fair comparison, always test on the same device.
How many tests do I need for an accurate result?
A single session (5 trials) provides reliable results, but testing on several different days and using your best score accounts for daily variation.
Can reaction time be improved with training?
Yes. Reaction time can get shorter with practice. Sleep quality and caffeine intake also affect your results.