Twitter is getting in on the social analysis game. The micro-blog will publish a daily measurement of Twitter sentiment surrounding the 2012 presidential election called the Twitter Political Index, the company announced Wednesday. The Index works like this: Every day, it scans every tweet mentioning one of the candidates and weighs it against millions of tweets posted about other topics. It then gives each candidate a sentiment score relative to all tweets — not just tweets about the other candidate. Read the full story at Mashable.