Attention · 1 min
Reaction time test
Tap when the box turns green. See your typical and fastest response across five trials.
Attention tasks
Attention and reaction-time tests
Try reaction time, colour-word challenges, response control and sustained attention tasks.
5 tests · 1–2 min · free
Start here
5 complete tests
Attention · 1 min
Stroop test
Name the ink colour while ignoring the word. Compare your speed and accuracy when they clash.
Attention · 1 min
Go/No-Go test
Respond to circles and hold back for squares. Check missed signals, false presses and response time.
Attention · 1 min
Selective attention test
Follow the middle arrow while ignoring its neighbours. See how distractions affect your responses.
Attention · 2 min
Attention span test
Watch a stream of digits and catch repeats. Compare your attention at the start and end.
How to choose
Each task here takes a minute or two and looks at a different part of attention, so pick by the question you have. For plain speed, start with the reaction time test: it reports your median response in milliseconds. To see how a clash between a word and its ink slows you, take the Stroop test. The go/no-go test asks you to respond fast and hold back on a rare shape, so it counts how often you press when you should wait. The selective attention test is a flanker task: it measures how much the arrows around the middle one slow you. The attention span test is the longest and compares the start of the run with its end.
Use the same device and the same hand each time, because a phone and a mouse give different times, and compare a result with your own earlier runs. None of these tasks diagnoses an attention condition.