About reaction & speed tests
Processing speed is how fast your brain takes in information and acts on it — the foundation under every other cognitive skill. These tests measure raw reaction time, decision speed, and pointing precision in milliseconds. They are quick, repeatable, and the easiest place to see day-to-day changes in alertness and fatigue.
Reaction & Speed tests (3)
Reaction Time Test
Reaction time measures how fast you respond to a visual stimulus — the rawest index of nervous-system speed.
Take the test →Choice Reaction Time Test
Choice reaction time (CRT) measures how quickly you can select the correct response from more than one option — not just react, but decide.
Take the test →Aim Trainer
The aim trainer measures pointing speed and precision — a real-world index of motor control (Fitts's law).
Take the test →