⚡ Free Attention Span Test Online
Click the green target the instant it appears. Don't click on red — only green counts. Your average reaction time measures your attention and focus.
Understanding Attention & Reaction Time
Attention span is your brain's ability to sustain focus on a task while filtering distractions. Reaction time — how fast you respond to stimuli — is one of the most measurable indicators of cognitive processing speed. Regular practice with attention-based games has been shown to reduce impulsivity and improve selective attention in both adults and those with ADHD.
Frequently Asked Questions
What is a normal attention span for adults?
The average sustained attention span for adults on a single task is around 20 minutes, though focused reaction windows last just milliseconds to a few seconds.
What does an attention span test measure?
This test measures reaction time and sustained visual attention — how quickly and consistently you respond to target stimuli.
What is a good reaction time?
Average human visual reaction time is 200–300ms. Under 200ms is excellent. Over 350ms suggests attention or fatigue issues.
Can brain games improve attention span?
Research shows reaction-based brain games can improve selective attention and processing speed, especially with regular practice.