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Are there any web apps that detect emotional negativity?

In video, audio, or text?

Note: Can you also tag this as text, negativity, and emotion?

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closed as off topic by Al E., phwd Sep 11 '12 at 4:19

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There are several things that do this for twitter. You can try for example twistori.com that has a very fancy interface. There is also tweetsentiments.com, twitrratr.com, and a slightly more complicated twendz.waggeneredstrom.com

and there is an incredible visualization project done by jonathan harris http://www.wefeelfine.org/

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