The chimp test is a short working-memory challenge with a memorable backstory. Numbered tiles appear scattered across a grid, then the numbers hide, and you click the tiles in order from memory: 1, 2, 3 and on. Each round adds a number. It sounds easy until you try it.
The research behind the name
The test takes its name from work at the Primate Research Institute at Kyoto University, where chimpanzees were trained on exactly this kind of task. In tests of recalling the positions of briefly flashed numbers, young chimpanzees outperformed human adults, reproducing the layout faster and more accurately. The finding surprised many people, since we tend to assume human memory is simply better across the board, and it suggests chimps may hold a kind of quick photographic grasp of a scene that adult humans have partly traded away for language.
The version here lets you take the same kind of challenge and see how far you get.
What it measures
The chimp test taps spatial working memory: how many positions you can fix in your mind at once, then recall in the right order after they vanish. It asks for two things together — which tiles and in what sequence — from a single brief look, which is what makes it climb in difficulty so quickly.
How to do better
A few habits help:
- Take it in at a glance. Read the whole grid as one image rather than hunting for numbers one by one. The picture fades fast, so a quick, wide look beats a slow scan.
- Group into a path. Link nearby numbers into a route your eye can follow, so you remember a shape instead of loose positions.
- Move promptly. The longer you wait after the numbers hide, the more the image decays, so click without dithering once you have it.
Try it yourself
The chimp test starts with four tiles and adds one each round, with three tries before it ends. See whether you can reach the kind of score that put those chimpanzees in the headlines.