Test Your Body
Make a hidden feature of perception appear on your own screen. Each short experiment includes clear instructions, a reset, a result explanation and scientific sources.
One signal at a time.
These experiences are educational demonstrations, not health or cognitive assessments. Your device and surroundings can affect the result.
Find the Gap in Your Vision
Each eye contains a place that cannot see. Your brain quietly paints over it all day.
2 min testReaction Time Test
Wait for the signal, then respond. A few hundred milliseconds reveal a chain from light to decision to muscle.
01 min testStroop Test
Name the ink, not the word. Reading is so practiced that it competes with the answer you are trying to give.
02 min testDominant Eye Test
Both eyes build the scene, but one may control alignment when you point through a small opening.
01 min testAfterimage Test
Stare at one color, then remove it. Adapted visual pathways can make its opponent appear on a neutral surface.
01 min testNotice the effect. Then follow the mechanism.
A browser can reveal a blind spot, a color afterimage or the interference created by an automatic reading response. It cannot reproduce the standardized equipment, repeated trials or clinical context used in research and healthcare.
Treat your result as the beginning of an explanation, not a score about your body. If a test is uncomfortable, stop. Persistent or concerning symptoms belong with a qualified healthcare professional.