Reaction Test | How to use and interpret results
Record five intervals between a colour change and a click, then show mean, fastest and slowest milliseconds. It is a reaction game rather than a neurological assessment.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Loading the tool. If it does not appear, reload this page.
How to use this tool
Start and wait for the signal before clicking. Premature clicks restart the wait; use the same device and input method when comparing attempts.
Results and examples
Times of 200, 210, 220, 230 and 240 ms average 220 ms. Display and input latency are included, so this is not an isolated human-response measurement.
Worked example
Times of 200, 210, 220, 230 and 240 ms average 220 ms. Display and input latency are included, so this is not an isolated human-response measurement.
Limitations
- Monitor, pointing-device and browser scheduling delays are not separated.
- Clinical, occupational and age-norm assessments are not provided.
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
How is a 220 ms average calculated?
Times of 200, 210, 220, 230 and 240 ms average 220 ms. Display and input latency are included, so this is not an isolated human-response measurement.
Does a slower score indicate a health problem?
Monitor, pointing-device and browser scheduling delays are not separated. Clinical, occupational and age-norm assessments are not provided.
