How to play
Keep your eyes on the dot. Its sign points left or right, then a star appears in one of the boxes. Tap that side fast. The sign is usually right, but not always.
Tap left or right · Or arrow keys
Free in your browser, with ten levels that get harder. No account; your best scores stay on your device.
What the study found
An arrow in the middle of the screen told people where a light would probably appear. They responded faster when it was right and slower when it was wrong, even with their eyes kept still. We can't check your eyes, so keep them on the dot.
Michael Posner · Quarterly Journal of Experimental Psychology, 1980
Why it matters
A hint about where to look speeds you up when it is right and slows you down when it is wrong. Expectations steer attention, for everyone. That is why KOZMO asks many people how often specific things happen, instead of relying on one person's expectations.
It is for fun: the game does not measure you.
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