👥 Crowd Pick
Perception / Speed · Free online · No download · No sign-up
Crowd Pick flashes two clusters of dots side by side and asks: which has more? You have a fraction of a second to decide. Sometimes the answer is obvious; sometimes the difference is one or two dots and the visual feels nearly even. The game targets the approximate number system — a primitive numerical intuition shared by humans and many animal species that lets us estimate quantities without counting. Crowd Pick is one of the cleanest browser implementations of an ANS benchmark.
How to play Crowd Pick
- Two clusters of dots appear briefly side by side.
- Choose which side had more dots before the timer runs out.
- Correct answers earn points and may shorten the timer for the next round.
- Wrong answers reset your streak.
- Cluster sizes and ratios randomise each round to prevent memorisation.
- Highest streak across all rounds is your record.
Tips to beat your high score
- Compare areas, not individuals. Your brain estimates a denser blob as more numerous. This usually works in your favour because more dots produce a larger overall blob.
- Beware sneaky spreads. A wide spread of fewer dots can fool the area heuristic. When clusters look similarly spread, lean on dot density rather than total area.
- Commit to your first instinct. Studies on the approximate number system show that initial guesses are more accurate than deliberated ones at these speeds.
- Stay calm at near-ties. When the ratio is close to 1, accuracy drops sharply. Accept that some rounds are nearly random and do not let one miss break your concentration.
- Use peripheral coverage. Look at the centre of the screen so both clusters fall in peripheral vision. Each cluster gets equal attention rather than serial scanning that wastes time.
What this game trains your brain to do
Crowd Pick directly tests the approximate number system (ANS), a cognitive primitive present from infancy and shared with many non-human animals. The ANS lets you compare two quantities without counting, with accuracy that depends on the ratio rather than the absolute numbers (Weber's Law). The intraparietal sulcus is the brain region most responsible for ANS comparisons, and its activation patterns correlate with mathematical achievement in school-age children.
Training the ANS through games like Crowd Pick has been shown in multiple studies to improve performance on standard arithmetic tasks, especially in children. The effect appears in adults too, though smaller. Strong ANS performance also correlates with better estimation in everyday life — judging how many cars are in a car park or how many people are in a queue.
About Crowd Pick
Crowd Pick was designed as a one-second-per-round speed game with depth that only becomes obvious at high streaks. The randomised ratio bands ensure each session feels different even after dozens of plays.
All CrizBrain games are free and run entirely in your browser. No account, no install. Your highest streak is saved locally on your device.