How the test works
Choose the correct action for one of several signals. Match the shown symbol to the corresponding button or key.
How the score is calculated
Reaction time is the median of the valid measured delays from the presented signal to the first accepted response, reducing the effect of one unusually fast or slow trial.
Measurement limits
Choice Reaction is slower by design than simple reaction because the signal must be classified before the correct response is selected. Accuracy is part of the task; guessing can create a fast time but a poor decision score. Compare runs with the same number of choices, since more alternatives increase decision load.
Sources and editorial notes
The method uses Pointer Events, Keyboard Events and the monotonic Performance API clock. Content is reviewed by CPS-TEST.ONLINE editors.
Published: 2026-07-11 · Updated: 2026-08-12 12:16:16