⚡ Reaction

How to play

1. Start a round by tapping or clicking the field. The screen turns red.
2. Wait calmly until, after a random delay (1–4 seconds), the colour switches to green.
3. Tap immediately — your reaction time in milliseconds is logged automatically.
4. If you tap too early, before green appears, the attempt counts as a miss and is not recorded.
5. Over several rounds your average emerges. Your best score is stored locally.

Tips & strategy

• Do not focus on the red surface itself — fix your gaze on a point at the edge instead. Tunnel vision onto the centre measurably slows reaction.
• Breathe calmly and inhale deeply before each attempt. Blood oxygen levels affect neural processing by 5–10 ms.
• Use a low-input-lag display. Standard office monitors often add 30–50 ms of latency — and that latency counts in your score.
• Avoid anticipation. People who try to predict the green tap too early. True reaction is reactive, never proactive.
• Take multiple attempts and use the median, not your best single shot. Outliers on the low end are usually near-too-early hits.
• Test yourself in the morning AND in the evening. Reaction time fluctuates by 20–40 ms across the day, depending on fatigue and caffeine.

History & background

Scientific reaction-time measurement traces back to Dutch physiologist Frans Donders, who in 1868 first systematically distinguished between simple and choice reactions. A simple visual reaction game — like Reaction on DropPlay — measures latency between visual processing in the visual cortex and motor response. Average values: healthy adults land between 200 and 270 milliseconds. Top athletes in disciplines like table tennis, sprinting and eSports reach values around 150–180 ms — neurologically, anything under roughly 100 ms is impossible because the signal path from eye to hand simply takes longer. These tests are today used as early indicators of fatigue, alcohol impairment and cognitive disease.

FAQ