The Classic Reaction Time Test is the simplest way to get a reaction score in milliseconds. Start the test, wait through a random delay, and respond only when the reaction area changes from red to your chosen GO colour. Clicking early counts as a false start.
This mode is designed for quick repeatable checks of your own visual response speed. Because the delay changes each attempt, memorising a fixed countdown will not help. For the most useful personal comparison, keep the same device and input method between sessions.
Your score is not produced by your nervous system alone. Display refresh rate, browser timing, device performance, mouse or touchscreen latency and how you physically press can all influence the measured result.
That is why repeated tests on one setup are more useful for personal tracking than comparing two completely different devices.
Keep your eyes on the reaction area, keep your hand in a comfortable ready position and resist guessing. If you are chasing a personal best, do several attempts but stop when you feel yourself anticipating the change instead of responding to it.
For a different type of reflex challenge, Choice Reaction adds a decision before you respond, while Aim Reaction asks you to locate and click targets around the arena.
The result is the measured time between the browser displaying the GO state and registering your input. It is useful as an on-device benchmark, but it is not a clinical measurement.
You responded before the GO state appeared. The random wait is intentional, so the goal is to react to the visual cue instead of predicting it.
Use whichever input you want to practise, but keep it consistent when comparing scores. Different devices and input methods can add different amounts of latency.
Yes. Classic mode lets you keep the waiting colour red and choose green, blue, yellow or purple as the GO colour.