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Re:Heat map of homophobic and racist tweets by fuzzybassoon on Monday May 13, 2013 @11:32AM (#5699216)
From the 'Details about this map' popup:

Because algorithmic sentiment analysis would automatically classify any tweet containing 'hate words' as "negative," this project relied upon the HSU students to read the entirety of tweet and classify it as positive, neutral or negative based on a predefined rubric. Only those tweets that were identified by human readers as negative were used in this analysis.

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