Memeorandum Colors 2012: Visualizing Bias on Political Blogs

As you?d expect, the universe of political blogs is largely split in two, with conservative and liberal blogs rarely covering the same stories or linking to the same sites. But it can be very challenging to tell their political leanings at a glance, especially with names like 'Balloon Juice,' 'Weasel Zippers,' or 'The Volokh Conspiracy.' So, four years ago, I launched a project with Delicious/Tasty Labs founder Joshua Schachter to visualize the linking biases of various political blogs on Memeorandum by looking at their past behavior. Using singular value decomposition, the linear algebra at the heart of your Netflix recommendations, we reduced the entire matrix of blogger-to-article relationships to a single dimension. Using those precalculated values, we load the data from Google Spreadsheets and color the links on Memeorandum, based on where they fall on the spectrum. The brighter the color, the more frequently they only cover stories by their counterparts.

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