How to play
Letters flash by, about ten a second. Two of them are numbers. Catch both. Ten rounds.
Watch, then tap the numbers · Or keys 2 to 9
Free in your browser, with ten levels that get harder. No account; your best scores stay on your device.
What the study found
The attentional blink.
In a fast stream of letters, people who caught one target often missed a second that arrived about 0.2 to 0.5 seconds later. When the second came further behind, they usually caught it.
Raymond, Shapiro and Arnell · J. Exp. Psychology: Human Perception and Performance, 1992
Why it matters
Spotting one thing leaves a brief gap where the next slips past. Nobody chooses that; it is how attention works. That is the KOZMO view of work too: the dot is never the problem, the situation is.
It is for fun: the game does not measure you.
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