What Is the Chimp Test?
The Chimp Test is a free browser-based number-location memory challenge. Several numbered tiles appear at scattered positions on a 5×5 board. Your job is to remember where those numbers are, select number 1, and then continue selecting the remaining locations in ascending order even after their labels disappear. The task asks you to hold a visual map in mind while making a sequence of decisions.
The name comes from research into numerical-location memory in chimpanzees, but this game is its own online implementation. It does not reproduce a controlled experiment or claim that a particular score makes you smarter than another species. You can use it as an informal way to practise visual attention, spatial encoding and ordered recall. Your performance may depend on how you study the board, your input device, distractions and familiarity with the game.
A fresh attempt begins with four numbered tiles. Clearing a round increases the number count by one, up to a maximum of 20 numbers. You have three lives; every wrong selection costs a life. The headline result is the highest number count you fully completed, supported by a round history and timing measurements rather than a clinical score or a population-based intelligence ranking.
How to Play the Chimp Test
Find a position where you can see the entire board comfortably. It helps to avoid moving your eyes back and forth between the interface and other windows. The numbered cells are arranged in a new random pattern for each round, so remembering one old layout cannot solve the next one.
- Press Start Test. The game places numbers 1 through 4 on distinct cells of the 25-cell grid.
- Study the locations. Before interacting, notice where every number is placed. You may trace a route mentally from the smallest to the largest number.
- Click number 1. Your first selection starts the input phase. Every other numbered tile becomes visually concealed.
- Continue in order. Select the hidden positions for 2, 3, 4 and so on. The cell locations stay fixed within that round, even though the labels are gone.
- Finish or lose a life. A perfect round adds one to the number count. A wrong tap uses one life, and the same level starts again with a newly shuffled board after a short pause.
- Review the result. The attempt finishes after three mistakes or after clearing 20 numbers. Check your highest fully completed level, recent-round graph, timing and history before trying again.
How the Chimp Test Score Is Calculated
The score is not the total number of individual cells tapped, and it is not a percentage. Your main score is the greatest number count you cleared without a mistake in that round. The game starts at four numbers. If you clear four, then five, and then make mistakes at six until you lose your remaining lives, the final score stays at five.
| Rule | What this version does |
|---|---|
| Board | 25 positions arranged as five rows and five columns |
| Starting difficulty | Numbers 1–4, placed in distinct random cells |
| Level progression | One extra number after each fully correct round, up to 20 |
| Lives | Three; a wrong tap removes one life |
| After a mistake | Same level with a fresh arrangement, if lives remain |
| Final score | Highest number count fully cleared; 0 if none cleared |
Wrong answers do not subtract points from an earlier cleared level. A failed round still appears in the history, showing how many positions you remembered correctly before your first mistake. For example, getting 7 of 8 positions correct does not count as clearing the eight-number level. You must finish the entire ordered sequence.
Understanding Your Results and Round Analytics
The result panel includes information beyond the highest cleared count. Each recorded round has its own attempted level, ordered positions matched, study time, input time and success or failure. These fields can be more useful for comparing practice sessions than a single number in isolation.
Ordered recall accuracy
The accuracy percentage combines correct ordered positions across all recorded rounds and divides by the total number of positions offered in those rounds. It is therefore possible to have a relatively strong position-recall percentage while still failing to complete a difficult level. That does not contradict the main score: the two values answer different questions.
Study time and input time
Study time measures the interval from the appearance of the numbered board to your first click. Input time begins at that first click and ends when the round succeeds or fails. The game reports the median of each across your recorded rounds. The measurements are approximate browser timings, not a calibrated measure of visual memory speed.
Recent-round graph and history
The graph shows up to the ten most recent rounds. A green bar marks a successfully completed number count, while an orange bar marks a failed round with the correct prefix remembered before the mistake. The full history lists the attempted number count, matched positions and timings for every round. If a comparison rank is unavailable, your own measurements still appear.
Practical Tips for Remembering Number Positions
- Memorize a route, not isolated squares. Connect 1 → 2 → 3 and continue through the board as a single visual path. This can reduce confusion after the labels disappear.
- Use landmarks within the grid. Notice whether a number sits at an edge, a corner, near the center or beside a previously remembered position.
- Group nearby positions. Small clusters can be easier to revisit than one long unordered list of spots, especially when levels become crowded.
- Check the final positions before starting. A common mistake is to memorize 1 and 2 carefully while rushing past the larger numbers.
- Keep input conditions consistent. Touchscreen size, zoom level, pointer movement and background distractions can affect the experience.
- Compare several attempts. A single bad round can end a run early. Looking at repeated sessions helps distinguish a momentary lapse from a more stable practice pattern.
Speed is not the only objective. A little more study time can help you complete a higher number count, while rushing may cause you to spend lives on easy positions. You can experiment with a deliberate strategy, then look at both cleared levels and the study/input medians to see what changed.
Common Mistakes to Avoid
Clicking 1 before the full sequence is memorized is the most important avoidable error. The remaining labels disappear immediately, so you cannot glance back for the next number. Another mistake is confusing the order with visual proximity: the next numbered cell may be far away, not next to the previous choice.
Do not assume that a wrong click leaves the original number arrangement available. The next attempt at the same level uses a newly shuffled layout. Also, remember that a partly completed round is not a cleared level. Review the ordered-position chart for partial recall and the final score for full completions.
The Chimp Test and Memory Research
Researchers have studied how chimpanzees and humans remember locations associated with numbers. Those studies can use controlled exposure periods, different training histories, specially designed apparatus and particular groups of participants. This website's game instead allows you to study each board until your first click, then hides the other labels. Its conditions, scoring and user population are different.
For that reason, this online score should not be used to claim a measured IQ, an age-based percentile, photographic memory or superiority over chimpanzees or other players. It also does not diagnose a neurological or visual condition. Think of the challenge as an approachable practice activity that makes the demands of remembering multiple locations easy to experience and observe.
Related Memory Challenges
Try other tasks when you want to practise a different kind of recall. The Visual Memory Test asks you to remember highlighted cells. Corsi Block focuses on repeating spatial sequences. Sequence Memory tests the order of flashing tiles, while Number Memory uses digit recall rather than locations on a board.