This fascinating three-and-a-half-minute excerpt from the BBC’s Horizon illustrates the McGurk Effect. What does your brain do when the information it is receiving from different senses doesn’t match? It’s solution is an example of just how much interpretive work our brain is doing all the time.

Via Blame it on the Voices.

Lisa Wade, PhD is a Visiting Scholar at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming Introduction to Sociology text. You can follow her on Twitter, Facebook, and Instagram.