What you See is what you Get
The experiment that gives “The Invisible Gorilla” its title reveals something about how much we see and don’t. More than a decade ago Professors Chabris and Simons made a short film in which players passed around basketballs. They then asked viewers silently to count the number of passes made by the players in white and ignore those made by the players in black. That sounds unremarkable except that about midway through, a woman in a gorilla suit walked in, faced the camera and pounded her chest before exiting. She was on the scene for nine whopping seconds but only about half the people watching the video saw the gorilla: they expected to see the players passing the ball, and that’s all they saw.
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