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The Focus Challenge
How sharp is your focus today?
Quick-fire rounds built on real attention science.
Speed How fast anyone can react — and why.
Focus What conflicting information does to attention.
Memory How much attention holds at once — for everyone.
No pass, no fail. Every round demonstrates a universal effect of human attention — measured with your own numbers.
The science behind the rounds
Reaction. Simple reaction time — the gap between something changing and your first response is mostly wiring, not thinking.
Count the dots. Subitising — up to about three or four you just see the number; past that you switch to counting one at a time.
Kaufman, Lord, Reese & Volkmann (1949), American Journal of Psychology
Odd one out. Pop-out vs serial search — a single-feature difference jumps out no matter the grid size; a two-feature difference has to be checked item by item.
Sequence. Working-memory span — most people hold about seven items, give or take two, one of the most cited numbers in psychology.
Colour vs side. The Simon effect — where something appears interferes with deciding what it is, even when position is irrelevant to the task.
Word vs ink. The Stroop effect — reading is so automatic it interferes with naming a colour, even when you're told to ignore the word.
Switch the rule. Task-switching cost — changing rule costs real time, every time. The true price of "multitasking."
Stop the marker. Anticipation timing — predicting where a moving target will be is a different skill from reacting to where it already is.
Catch both. The attentional blink — for a brief window after spotting one target, a second target can go unseen entirely.
Word memory. False memory — the brain stores the gist of a list, not the exact words, so a word that merely fits the theme can feel just as remembered as one you actually saw.
How we use your score
About your score: we save your score and how long you took, so we can show you how it compares with other players. We don’t ask for your name or email. Scores are kept for 36 months. See our Privacy Policy.
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