Reaction Time

Measure how fast you react to visual stimuli. Click when the screen changes color.

Difficulty: Easy
Avg Score: 245ms
Plays: 2.4M

How It Works

Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.

Controls

SPACE or Click

You can also use your mouse/touch to interact.

Tips

  • •Stay focused on the center of the screen
  • •Keep your finger ready on the mouse or SPACE key
  • •Don't anticipate - wait for the actual color change
  • •Take breaks between attempts to maintain focus

Press SPACE or click the button to begin

Metric

milliseconds (ms)

Average

245ms

Difficulty

Easy

Plays

2.4M

What It Tests

Visual reaction speed and hand-eye coordination. Measures the time between stimulus and response.

How It Works

Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.

Why It Matters

Reaction time is crucial for gaming, driving, sports, and emergency response. Professional esports players average 150-180ms.

Tips to Improve

  • 01Stay focused on the center of the screen
  • 02Keep your finger ready on the mouse or SPACE key
  • 03Don't anticipate - wait for the actual color change
  • 04Take breaks between attempts to maintain focus

Reaction Time | Free Online Cognitive Test by BrainRivals