Change Blindness

Spot what changed — your brain doesn't record everything, it samples.

About This Game

Change Blindness presents two alternating scenes with a brief flash between them. Something changes — an object appears, disappears, or shifts color. Can you spot it? Most people are surprised by how long it takes, revealing a fundamental limitation of visual attention.

What It Trains

• Visual attention: Where you direct your focus
• Change detection: Noticing differences across time
• Scene understanding: How the brain parses visual information

The Science

Change blindness demonstrates that visual perception is not a complete recording of the environment — the brain selectively processes what it attends to. Unattended objects, even large ones, can change without detection. This has important implications for eyewitness testimony, driving safety, and aviation.

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