Reaction Time

Reaction time is how quickly you respond to something you could not perfectly predict — here, the instant the screen turns green. It measures the speed of your visual–motor loop: your eye detects the change, your brain processes it, and your hand clicks. The same loop is behind braking in traffic, returning a serve, and reacting in games.

Cognitive domain: Processing Speed

Click once to start, then wait. After a random delay the whole screen flips to green — click as fast as you can. The delay is randomized on purpose, so you cannot memorize the timing; clicking before green counts as "too soon" and the round restarts.

Your result is measured in milliseconds, lower is better. On the MindSprint scale a click around 600 ms sits at the low end and about 150 ms at the top, with most attempts landing in between. Human visual reaction has a real floor — the signal genuinely takes time to travel — so consistent sub-150 ms times usually mean you guessed rather than reacted.

• React, don’t anticipate — respond to the color, not to a rhythm you expect.
• Rest a finger lightly on the mouse button so you are not travelling from far away.
• Use low-latency gear: a wired mouse and a higher-refresh screen shave off real milliseconds.
• Test when you are alert — fatigue slows you down, and a single lucky click matters less than a steady average.

What is a good reaction time?

Simple visual reaction times typically fall in the low-to-mid hundreds of milliseconds. Faster is better, but consistency across several attempts tells you more than one quick click.

Why did it say “too soon”?

You clicked before the screen turned green. The wait is randomized so it cannot be timed — just watch for the color change.

Can I actually improve it?

Somewhat. Being rested and focused and using low-latency equipment helps, but everyone has a biological lower limit.