During an AllSides Blind Bias Survey, participants from all sides of the political spectrum and a diverse array of ages and geographic locations are asked to rate the content of a media outlet blindly, so they are not influenced by preconceived notions of a brand's bias.
AllSides uses multiple methods for calculating media bias ratings.
Our blind bias survey, described in the graphic below, represents our most robust media bias rating method, but it is not the only method we use. A source might openly share its bias, or it may be determined by third party research, an independent review, or an editorial review. Take a look at the multiple methods AllSides uses to measure and rate media bias.