30 experiments testing your vision, sense of time, and calibration. How well do you really know your own senses?
Red to green. Click fast. 5 trials. How do you compare to the human average?
Image flashes, something changes. Can you spot it? 5 rounds.
See a color for 3 seconds, then pick it from 6 similar shades.
Ebbinghaus illusion: identical circles that look completely different.
Identify shapes in your periphery while fixating on the center.
Rate how fast you spot the impossibility in Penrose-style figures.
Are these grays the same or different? Your monitor disagrees with your brain.
Color words in wrong colors. Name the color, not the word. Time yourself.
Stare at a rotating pattern, then see a static image move.
Count the events. Miss something obvious. The classic awareness test.
Start, count to 10 in your head, stop. No timer visible. How far off are you?
Hear a beat, then reproduce it from memory. How accurate is your rhythm?
Watch an animation. Estimate how long it lasted.
Estimate 10 seconds while doing math vs relaxing. See the difference.
Progress bar vs distraction. Rate how long each felt.
Hear a tone, then pick it from options after a delay.
Two rhythms: same or different? Test your auditory pattern matching.
Which side did the sound come from? Test your stereo perception.
Fun task vs boring wait. Same duration. Estimate each.
Sync your tapping to a metronome. Measure your drift over time.
Estimate real sizes of everyday objects. How calibrated are your hands?
Big light vs small heavy. Experience the size-weight illusion.
Dots flash for one second. How many? Subitizing vs estimation.
Two points on screen. Estimate the real-world distance.
A dot moves across the screen. Estimate its speed in mph.
See an angle, estimate the degrees. 5 rounds.
10 questions with confidence levels. Are you overconfident or underconfident?
Number sequences, increasing length. Find your digit span limit.
Weather scenes. Estimate the temperature. Compare to actual.
Count scattered objects as fast as possible. Accuracy vs speed tradeoff.