What Is the Chimp Test?
The Chimp Test is inspired by a famous experiment conducted at the Primate Research Institute of Kyoto University. In 2007, researcher Tetsuro Matsuzawa published a study showing that a young chimpanzee named Ayumu could memorize the positions of numbers flashed briefly on a screen and then correctly tap them in sequence — faster and more accurately than human adults.
This test replicates that challenge. Numbers appear on a grid, and after you click the first one, the remaining numbers are hidden. You must remember their positions and click them in ascending order. The number of digits increases with each successful round, testing the limits of your visual short-term memory and spatial recall.
How This Test Works
The test begins with 4 numbers displayed on a grid. All numbers are visible when the round starts. When you click the first number (1), all other numbers are hidden behind blank tiles. You must then click the remaining tiles in the correct ascending order from memory.
- 4-5 numbers: Most people can handle this level comfortably.
- 6-7 numbers: Challenging for most adults. Ayumu the chimpanzee performs reliably at this level even with 210ms exposure times.
- 8-9 numbers: Requires excellent visual-spatial memory. Few untrained humans reach this level consistently.
- 10+ numbers: Exceptional performance that matches or exceeds what most chimpanzees achieve.
You have 3 strikes. Each incorrect click costs one strike. On a strike, you retry the same level. After 3 strikes, the game ends and your highest completed level is your score.
Why Chimps Outperform Humans
The finding that chimpanzees can outperform humans on this task surprised many researchers and challenged assumptions about human cognitive superiority. Several hypotheses explain this advantage:
Eidetic (Photographic) Memory
Young chimpanzees appear to possess a form of eidetic memory — the ability to retain a vivid, detailed image of a visual scene after very brief exposure. This type of memory is present in some human children but typically fades with age and the development of language-based memory strategies.
The Cognitive Tradeoff Hypothesis
Matsuzawa proposed the "cognitive tradeoff hypothesis," suggesting that as humans evolved language and complex symbolic thinking, we lost some of the raw visual memory capacity that our primate relatives retained. In essence, our brains traded spatial memory capacity for language processing ability.
Processing Strategy
Humans tend to process information sequentially and verbally (mentally saying "1 is top-left, 2 is middle-right..."), while chimpanzees may process the entire visual scene holistically and simultaneously. The sequential verbal strategy is slower and more prone to error than direct spatial mapping.
Tips to Improve Your Score
- Take a mental snapshot: Instead of reading the numbers sequentially, try to absorb the entire pattern at once before clicking.
- Use spatial memory: Focus on the positions relative to each other and the grid edges, not on individual locations.
- Start quickly: The longer you wait before clicking the first number, the more the memory trace fades. Click #1 as soon as you've encoded the pattern.
- Practice regularly: Visual-spatial memory is trainable. Regular practice has been shown to improve performance over time.
- Chunk the numbers: Group nearby numbers into clusters. Instead of 9 individual positions, think of 3 groups of 3.
The Original Ayumu Study
In Matsuzawa's original experiment, numbers 1-9 were displayed on a touchscreen for just 210 milliseconds (about one-fifth of a second) before being masked. Ayumu correctly recalled the sequence about 80% of the time at this speed, while human university students performed significantly worse.
The study has been replicated many times and remains one of the most compelling demonstrations that non-human primates can outperform humans on specific cognitive tasks. It has influenced research on memory, evolution, and the relationship between language and cognition.
Interestingly, Ayumu's mother Ai, an adult chimpanzee, performed more like humans — suggesting that this exceptional visual memory may be an age-dependent trait in chimpanzees, just as eidetic memory is more common in human children than adults.
Frequently Asked Questions
What is a good Chimp Test score?
Most untrained adults can reliably remember 5-7 numbers. Scores of 8-9 indicate strong visual-spatial memory, and 10+ is exceptional. Ayumu the chimpanzee could consistently handle 9 numbers at very brief exposure times.
Can practice improve my score?
Yes. Research shows that visual-spatial working memory is trainable. Regular practice, combined with strategic approaches like chunking and holistic encoding, can lead to significant improvements over weeks of training.
Why is this test sometimes called the "Are You Smarter Than a Chimp" test?
The test went viral after media coverage highlighted that chimpanzees outperformed humans on this specific memory task. While the comparison is somewhat misleading (it tests only one narrow type of memory), it effectively demonstrates that human cognitive abilities are not universally superior to those of other primates.