The Five Intuition Tests
Human Intuition is built around five categories, each targeting a different facet of intuitive estimation. Every test measures how accurately you judge a specific quantity — and reveals your personal calibration drift.
Quick Overview
Visual Intuition
Proportions, angles, colors and patterns by eye.
Physical Intuition
Weight, force, balance, friction and material strength.
Time Intuition
Durations, rhythms, gaps and reaction times.
Quantity Intuition
Numbers, sums and differences without counting.
Memory Intuition
Short-term recall of colors, positions and patterns.
👁️ Visual Intuition
Visual intuition is your ability to estimate proportions, angles, colors and patterns by eye. This category reveals your perceptual calibration.
What you do
- • Judge how full a glass is (fill level).
- • Estimate an angle in degrees.
- • Match a briefly shown color from 4 options.
- • Spot the darker or lighter swatch in a grid.
- • Memorize and reproduce a pattern of symbols.
- • Choose the more balanced composition of two shape arrangements.
What it measures
- • Perceptual calibration — how close your visual estimates are to reality.
- • Personal bias — people consistently over- or under-estimate angles and fill levels.
- • Color discrimination — how finely you can distinguish near-identical hues.
- • Pattern memory — short-term visual recall of arrangements.
What you can improve
- • Recognizing and correcting your angle-estimation bias.
- • Better judging of proportions without measuring.
- • Faster color matching — useful in design and everyday tasks.
⚖️ Physical Intuition
Physical intuition is your subconscious grasp of how the physical world behaves — your internalized physics model.
What you do
- • Estimate the weight of an object (from a coin to a blue whale).
- • Estimate the force needed in a physical scenario (opening a door, pushing a car).
- • Predict which side of a lever will tilt down.
- • Judge which surface requires more force to slide across.
- • Estimate how far a material stretches under force.
- • Identify which material is strongest.
What it measures
- • Internalized physics — how well your instinct matches real-world mechanics.
- • Unit intuition — grams vs kilograms, newtons vs muscle memory.
- • Force and torque estimation — understanding balance and leverage.
- • Material intuition — knowing which substances are stronger or more flexible.
What you can improve
- • Judging effort and force needed for everyday tasks.
- • Intuitive awareness of scale — useful in cooking, sports and DIY.
- • Better calibration when units are unfamiliar.
⏱️ Time Intuition
Time intuition is how accurately you can produce or estimate durations without a clock — your inner sense of timing.
What you do
- • Press START/STOP to estimate how long an event lasted.
- • Reproduce a rhythm you just heard.
- • Estimate the interval between two events.
- • Click at an exact target moment.
- • Predict when a hidden process will finish.
- • React as fast as possible when a signal turns green.
What it measures
- • Temporal calibration — accuracy of your inner clock.
- • Rhythm reproduction — short-term auditory-motor memory.
- • Reaction speed — how quickly your body responds to a stimulus.
- • Prediction — anticipating the end of a process without a timer.
What you can improve
- • Accurate time estimation — highly trainable in a few sessions.
- • Reaction speed — improves with practice and habituation.
- • Rhythm and timing — useful in music, sports and cooking.
🔢 Quantity Intuition
Quantity intuition is your ability to estimate numbers, sums and differences without counting — your internal number sense.
What you do
- • See a brief flash of digits and estimate their sum.
- • Judge how many numbers meet a simple condition.
- • Estimate a group's share in a chart.
- • Guess the missing number in a pattern.
- • Estimate how much larger one group is than another.
- • Gauge the number of dots in a flash.
What it measures
- • Subitizing — instantly recognizing small quantities.
- • Estimation under pressure — reasoning without calculation.
- • Anomaly detection — spotting what doesn't fit a pattern.
- • Approximate arithmetic — summing without exact counting.
What you can improve
- • Better "sense of scale" for numbers — useful in finance and estimating.
- • Faster mental approximation.
- • Quick pattern recognition in sequences.
🧠 Memory Intuition
Memory intuition is short-term perceptual recall under time pressure — the ability to remember what you just saw and act on it.
What you do
- • Memorize a set of blue circles, then select them after a flash.
- • Remember the position of a target dot.
- • Recall a sequence of numbers shown briefly.
- • Remember a pattern of illuminated grid tiles.
- • Identify which shapes briefly disappeared.
- • Reproduce a sequence of symbols.
What it measures
- • Visual short-term memory — how much you hold for a few seconds.
- • Working memory — holding and manipulating information.
- • Spatial memory — remembering positions in space.
- • Change detection — noticing what was removed.
What you can improve
- • Short-term memory capacity under time pressure.
- • Faster encoding of visual information.
- • Better attention to detail in visual scenes.
Ready to try them?
All five tests are available for free on the homepage. Pick a category on the left and start playing — no account needed.