The Invisible Gorilla

http://www.theinvisiblegorilla.com/gorilla_experiment.html
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PainSci notes

Description and video of a classic mind-blowing psychology experiment that demonstrated “inattentional blindness” — such as not noticing a gorilla walk through a group of people you’re watching.

Chabris & Simons book is excellent read: see The Invisible Gorilla.

Related Content

1. The Invisible Gorilla: How our intuitions deceive us (book), by Christopher Chabris and Daniel Simons.
2. “The invisible gorilla strikes again: sustained inattentional blindness in expert observers,” Drew et al, Psychol Sci, 2013.

These two articles on PainScience.com cite this item as a source:

1. Trigger Point Doubts
2. Palpatory Pareidolia & Diagnosis by Touch