AllSides describes how they rate bias - it is supposed to reflect the average judgment of Americans, only reflects the web pages on news (not opinion pieces) an

AllSides describes how they rate bias - it is supposed to reflect the average judgment of Americans, only reflects the web pages on news (not opinion pieces) and they are continually getting more data and changing. Explanation here http://www.allsides.com/bias/bias-ratings http://www.allsides.com/bias/bias-ratings