Reaction Time Test & Performance Lab
Measure visual reaction time with randomized signals, early-click detection, median results and CSV session exports.
What Is the Reaction Time Test & Performance Lab?
Measure visual reaction time with randomized signals, early-click detection, median results and CSV session exports. Sessions run locally. Trial-level results can be exported as CSV, and the last ten completed session summaries are saved in this browser. Switching away from the tab stops an active session to avoid misleading timing.
How It Works
Wait for the green GO signal, then click the test surface or press Space/Enter. Complete 3, 5 or 10 valid trials. Early clicks are excluded.
When to Use It
Use for personal practice, casual challenges and comparing your own sessions under consistent conditions. This is not a clinical cognitive assessment, an IQ test or a scientifically normalized ranking.
Frequently Asked Questions
- Are Results Comparable Across Devices?
- Not precisely. Display refresh, input latency, browser load and selected settings change the results. Use the same device and settings for personal comparisons.
- Where Are Results Stored?
- Only in this browser. Export the current trials as CSV for a portable record. No scores are uploaded or ranked.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.