Brain Test Suite
Six timed drills in one place — Schulte table, Stroop test, chimp test, n-back, number memory and visual memory. Bests kept on your device.
Reading your score honestly
- The bands are rules of thumb from the ranges usually quoted for each task, not percentiles from a measured sample. Treat them as rough.
- Your first attempt at any of these is mostly learning the format. The second and third runs are the ones worth comparing.
- Practice improves your score on the specific test far more than it improves anything else — that is the main finding of the research on brain training, and it applies here too.
- Screen size, mouse versus touch, tiredness and caffeine all move these numbers more than most people expect. Compare yourself to yourself, on the same device.
- N-back counts false alarms against you, so pressing match on everything scores worse than pressing it on nothing. There is no way to game it.
- Everything runs and is stored on your device. No score leaves the page.
How to use
- Pick a test along the top and read what it measures.
- Press Start. Each run takes under a minute.
- Your best for each test is kept in this browser so you can watch it move.
Frequently asked questions
Are these real tests?
They are faithful versions of tasks used in research — the Stroop and n-back tasks in particular are standard. What is not research-grade is the interpretation: the bands here are rules of thumb from commonly quoted ranges, not percentiles from a measured sample, and they say so on the page.
Why did my score jump so much on the second try?
Because the first attempt at any of these is mostly learning the format rather than measuring anything. Compare your third run onwards. This practice effect is also why brain-training claims are treated sceptically — people get better at the test far more than at anything the test stands for.
Can I cheat the n-back by pressing match every time?
No, and that is deliberate. It scores hits and false alarms together, so pressing on everything scores worse than pressing on nothing. Roughly 70% of positions are not matches.
What is a Schulte table for?
Finding 1 to 25 in order without moving your eyes trains how much you can take in at a glance. It is popular with speed-reading courses. The per-cell time is shown as well as the total, because a 7×7 in 40 seconds is a much better result than a 5×5 in 40 seconds.
Why do chimpanzees beat people at the chimp test?
Young chimps hold a brief visual snapshot far better than adult humans do. One theory is that the human trade-off for language cost us some of that photographic short-term memory. Most adults stumble around 9 to 12 numbers.
Does anything leave my device?
No. Every test runs in the page and every best score is stored in your own browser. There is no account and no shared leaderboard.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.