Reaction Test
A browser reaction game with single rounds, a five-round scorecard, and a signal-check mode. Compare complete sets on the same device, or tap green targets while ignoring amber decoys.
How to Play
- Watch the screen — it will change from blue to green at a random interval.
- Click or tap the moment you see the green signal.
- Your reaction time in milliseconds is displayed after each attempt.
- Clicking too early registers as a false start — wait for green!
- Compare complete five-round averages rather than selecting only your fastest click.
- In Signal Check, tap green ✓ targets and leave amber × decoys alone. Each set has eight signals.
Features
- Read the score and the badge separately
- Average tracker across multiple rounds
- Five-round scorecard shows every time, the average, and the spread
- Eight-signal mode scores correct actions out of eight
- Simple, distraction-free interface for pure focus
- Reaction rank titles from Snail to Cobra
Tips & Strategies
- Use the same device, browser and input method when comparing sessions.
- Wait for green rather than trying to predict the random delay.
- Compare complete five-round averages rather than selecting only your fastest click.
Strategy Guide
Read the score and the badge separately
The five-round mode reports an average, while the animal badge uses your fastest round. For example, 190, 250, 270, 290 and 300 ms average 260 ms, but the fastest round earns Cobra. The table below describes game thresholds, not population percentiles.
| Fastest round | What it means |
|---|---|
| ≤200 ms | Cobra |
| >200–250 ms | Cat |
| >250–320 ms | Human |
| >320–450 ms | Sloth |
| >450 ms | Snail |
These are BytePlay game labels, not measured population percentiles or health assessments. The badge uses the fastest round; the five-round score uses the average.
What this browser timer measures
The timer starts when the code switches to the ready state and stops in the click handler. It does not measure when light reaches your eyes or isolate your biological response. Display refresh, input handling and browser scheduling affect the result. A millisecond display is not a guarantee of millisecond accuracy.
A repeatable session
Complete a five-round set on one device with the same input method. An early click clears the set, so wait for the signal. Compare several complete sets under similar conditions. BytePlay has no representative population dataset and does not use these scores to assess health or professional ability.
Signal Check scoring
Five green targets and three amber decoys appear in a shuffled eight-signal set. Tap a green ✓ within 1.2 seconds; leave an amber × untouched for 1.2 seconds. Each correct action earns one point. The result also shows false taps, missed targets, and the average time of green targets you hit. This mode has a separate 0–8 record and is not part of the five-round daily challenge.
About This Game
Single rounds, a five-round scorecard, and an eight-signal recognition mode. Browser and device delays affect reaction times; compare sets on the same device.
Frequently Asked Questions
- What is a good score?
- Use your own complete sets as a reference. The animal labels are game thresholds, not validated adult averages or professional standards.
- Does my device affect the result?
- Yes. Display, browser and input delays are included. Mouse and touch results should not be treated as interchangeable.
- What happens after an early click?
- The attempt is invalid. In five-round mode the series starts over.
- Is Signal Check a reaction-time record?
- No. It scores correct actions out of eight. The time average is shown only for green targets you hit.
