Disclaimer. This activity is not an assessment of attention conditions and does not diagnose anything. Full disclaimer

Sustained Attention

Press only for the right symbol. Hold back for everything else.

Start testAbout 1 minute · demo and practice first

What it measures

How well you respond to a target symbol and ignore others, reported as balanced accuracy, plus your median response time on correct targets.

DurationAbout 1 minute

Format24 symbol trials, half are targets

Device and setupKeyboard (Space) or one touch target.

Accessibility limitsRequires seeing small shapes and an internal line, and responding within 1.2 seconds.

Free resultBalanced accuracy and median correct response time

PrivacyYour answers are never sent to advertisers. Signed in, your results are saved to your account.

How it is scored

Hits, misses, false alarms and correct rejections are combined as balanced accuracy: the average of your hit rate and your correct rejection rate. Median response time on correct targets is shown separately.

Starter content, version 1. Difficulty is provisional until pilot data supports it. Full methodology

What Premium adds

Misses, false alarms and speed profile. One upgrade covers all ten tests. See Premium

Limits

This activity is not an assessment of attention conditions and does not diagnose anything.

For education, entertainment and general self-exploration only. These activities are not medical or psychological assessments and do not diagnose, prevent or treat any condition. Results are estimates of performance on these tasks and can be affected by practice, attention, language, your device and your surroundings. If you have concerns about your thinking, vision or hearing, consult a qualified healthcare professional.