What the five-round reflex test measures
A five-round reaction reflex test records the interval between a visible signal and a valid browser input. The result is a practical browser measurement, not a clinical assessment of a person. Display refresh, device processing, input hardware, operating-system scheduling, and browser timing can all contribute to the number you see.
How each round works
- Start a round when you are ready to focus on the test panel.
- Wait through the randomized delay. The panel changes to green when the signal is presented.
- Click, tap, press Enter, or press Space after the signal appears. The browser records the elapsed time in milliseconds.
Why early clicks are excluded
A click during the waiting state is a false start, not a fast response. Excluding it prevents anticipation from being reported as reaction speed and gives every valid round the same signal-to-input sequence. Begin the round again and respond only after the panel turns green.
How to read five results
One unusually fast or slow response should not define a session. The homepage lists every valid round and summarizes the best, median, and average values. The median shows the middle of the ordered results, while the average uses all five values. Comparing those numbers can help you notice consistency without treating one score as a universal ranking.
How to compare sessions fairly
Use the same browser, device, display, and input method when repeating the test. A touchscreen and a desktop mouse follow different input paths, so their results should be compared cautiously. Repeat complete five-round sessions and look for a pattern instead of chasing a single millisecond value.
Scores are calculated in the active browser session. The site does not require an account, send reaction scores to a server, or maintain a public leaderboard.