How to play
Find the one amber square, eighteen times. Sometimes it is the only amber thing. Sometimes it hides among amber circles and teal squares. Notice which is harder.
Tap the amber square
Free in your browser, with ten levels that get harder. No account; your best scores stay on your device.
What the study found
A target that differs by one feature, like colour, is found just as fast however many shapes surround it. A target set apart only by a combination of features takes longer with every extra shape, as if attention has to visit them one by one.
Anne Treisman and Garry Gelade · Cognitive Psychology, 1980
Why it matters
Something different jumps out at once. Something that blends in takes real searching. That is one reason KOZMO gives what keeps happening at work a name: a name is something a team can say out loud in a meeting.
It is for fun: the game does not measure you.
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