⚡ Reaction Time

How to play

This measures how quickly you respond to a visual signal. Click the panel once to arm a round; it turns red and tells you to wait. After a random delay it turns green and reads CLICK NOW, and the clock starts at that instant. Click again as soon as you see it change and your time in milliseconds is shown.

• The panel — one control does everything. Click or tap it to start a round, then click again the moment it turns green. Clicking while it is still red is a false start.
• Reset Scores button — clears Best, Last, Avg and the list of past results, and returns the panel to its starting state.

Scoring

Your time is the gap between the panel turning green and your click, measured with a high resolution clock. Each result is added to the row of pills, and the three boxes update after every attempt: Best is your fastest, Last is the attempt just made, Avg is the mean of every recorded attempt this session. Times are colour coded, green under 200 ms and red above 400 ms. A false start is not recorded at all, so it cannot hurt your average, but the round is cancelled.

Tips

• The wait is randomised between roughly 1.5 and 4.5 seconds, so there is no rhythm to anticipate.
• Watch the whole panel rather than reading the text. The colour change registers faster than the words.
• Keep your finger already resting on the button, so the click is a press rather than a movement.
• Take eight or ten attempts before judging yourself. A single result varies a lot; the average is the number worth improving.

Frequently asked questions