Ideas worth spreading

Are we in control of our own decisions?

8,142,953 views | Dan Ariely • EG 2008

Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we're not as rational as we think when we make decisions.

Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we're not as rational as we think when we make decisions.

This video is a TED "Best of the Web" pick, featuring a remarkable idea available on the internet from an independent creator. This idea didn’t come from TED, but TED is thrilled to spread it. TED's editors chose to feature it for you.

About the speaker

Dan Ariely

Behavioral economist

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Dan Ariely questions the forces that influence human behavior and the irrational ways we often behave.

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About Best of the Web

Best of the Web, like the rest of TED.com, involves compelling people and ideas. But unlike TED Talks, these videos don't come from TED or our partner conferences: they're curated from around the internet, drawing on freely available videos from creators with an idea worth spreading.

This video is a TED "Best of the Web" pick, featuring a remarkable idea available on the internet from an independent creator. This idea didn’t come from TED, but TED is thrilled to spread it. TED's editors chose to feature it for you.