From Buzzfeed: Twitter Launches Political Index: The Twitter Pulse Of The Election The Twitter Political Index leverages the growing science of sentiment analysis, in which computers — machines! — try to assess what the meaning or feeling of a piece of writing really is. Which isn’t easy — particularly for “short form content like tweets, which often lack context,” Topsy’s chief scientist Rishab Ghosh tells me. But Topsy’s algorithms agree with a randomly selected human 90 percent of the time on what a tweet means, validated over 30,000 tests.
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From Buzzfeed: Twitter Launches Political Index: The Twitter Pulse Of The Election

The Twitter Political Index leverages the growing science of sentiment analysis, in which computers — machines! — try to assess what the meaning or feeling of a piece of writing really is. Which isn’t easy — particularly for “short form content like tweets, which often lack context,” Topsy’s chief scientist Rishab Ghosh tells me. But Topsy’s algorithms agree with a randomly selected human 90 percent of the time on what a tweet means, validated over 30,000 tests.

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