Caltech time-traveling illusion tricks the brain into seeing things that aren't there

The primary illusion developed by the research team is dubbed the Illusory Rabbit. Three beeps, 58 milliseconds apart are played but only the first and third beep are accompanied by a flash, on the left and then the right side of the screen. The study found that most people viewing the illusion perceived an extra central flash alongside the second beep. When the illusion is repeated, without the three beeps, participants tended to only see the two left and right flashes delivering strong evidence that the brain uses postdictive processing to generate its overall perception of reality.

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