Target Watch (Go/No-Go)

◈ E2 · Conditional

Evidence for: trained vigilance tasks

How to play

Target Watch (Go/No-Go)

Letters appear one at a time. Hold back: press for every letter except X. Catch: press only for X. Space, J or the button.

This is a practice exercise, not a medical test. Response times in a browser are only comparable with yourself on the same device.

What does this train?

Part of the method Sustained Attention Task. On the web you answer for real, so we can measure accuracy and response time. A YouTube video can only ask you to score yourself.

Reading your results

Compared with yourself: personal best and your recent sessions. We never rank you against “the population” or convert scores into IQ.