We wrote about Clay Shirky’s “cognitive surplus” theory earlier this week – here’s a video of him talking more at length about the idea. In it he explains the process by which he determined the amount of “human thought units” used in watching sitcoms versus creating user generated content, in the form of Wikipedia entries (by his calculation, Americans spend 2,000 more units per year zoned out in front of the boob tube than creating content). Watch it below:

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