Where your errors land says how you think
Every pair is a first letter (A or not) and a second letter (X or not). The mistakes you make in each box point to a different habit.
Are you a planner or a reactor?
Everyone mixes both styles. Your balance of A → Y and B → X slips shows which you leaned on this round.
Waits for the second letter, then looks back. Flexible, but under time pressure an X can trigger a tap before the check finishes.
Typical slip: tapping on B → XUses the first letter to prepare. Fast and accurate on targets, but a strong expectation can fire on A → Y.
Typical slip: tapping on A → YOne of psychology's workhorse tests
Continuous performance tests have been around since the 1950s, in many versions. The A-then-X rule you just played is among the most studied.
The first CPT
Researchers designed it to spot attention problems after brain injury — press for one letter among many.
A-then-X
Adding a cue letter turned it into a test of holding context in mind, widely used in research on schizophrenia and ageing.
Part of the toolkit
Versions are used alongside interviews and questionnaires in attention assessments — never as a diagnosis on their own.
Holding the context
The whole game hinges on remembering the letter before. Pick a region.
Staying alert for the rare target
A long stream of letters, with only a few that need a response. It's the classic clinical measure of vigilance, impulsivity and attention over time.
Where it matters most day to day
More attention games
All 40 games →Tap every digit except 3.
Spot the rare double-jump of a clock hand.
Go fast — unless the arrow turns red.
Alternate rules without losing speed.