Check your reaction speed and focus. React to colors and sounds — or stay still when the rule says so.
Press Start. React to the cues. Orange means do nothing.
Level 1 is a simple “see green, click” task. Level 2 adds response selection (which key to press) and inhibitory control (sometimes the correct action is to do nothing). That makes the test feel more like real situations where you must react quickly and avoid impulsive mistakes.
Standard uses two colors with two responses. Sound mode adds an audio cue, while Advanced mode uses two colors + a sound cue mapped to different keys. Orange is always “no-go” (don’t press anything).
Orange is designed to catch impulsive responses. If you press, it’s not a “reaction” mistake — it’s a control mistake. Relax your hands and treat orange as a stop cue.
Device lag matters (screen refresh + input delay). Use the same device when comparing progress over time.
For meaningful tracking, aim for clean runs first. Once you stop making avoidable errors, your speed becomes easier to interpret.