Choose the task, not a label
Remembering a sequence is different from recognizing a word. Hitting a target combines seeing, moving and clicking; a reaction test keeps the target still. Typing adds a familiar skill and a speed–accuracy trade-off. A single score cannot stand in for all of these.
Make comparisons useful
Keep the same device, input method and browser size. Learn the rules before treating a run as a reference, and take breaks when you feel tired. Practice can improve your performance at the game; it does not establish a change in general intelligence.
What these games are not
These are informal online brain games, not validated cognitive assessments or medical screenings. We do not assign an IQ, a brain age or a percentile. Scores stay in page memory and disappear on reset or navigation.
Three ways to challenge attention
Visual memory asks where tiles appeared, without requiring an order. The colour-word challenge asks for ink colour while a word competes for your attention. Go/no-go asks when to act and when to leave a signal alone. Each page explains its timing rules and reports only what happened in that run.