TREND REPORT #1: Political Bias by TV Network

The chart at right summarizes the slant ratings for the networks we have thus far analyzed in January. Our previously published Flash Reports are useful snap shots, but the trend analysis better portrays the long-term political orientation of the networks, programs, and time periods we are studying.

The lines and markers in our graph represent the high/low/weighted average slant ratings for each network in our previous 2 weeks of analysis. Even with this relatively small data set, trends are beginning to emerge.

ABC has operated within a very tight range, as had CNN, indicating that they are quite purposeful about their political orientations — and none too slanted, either.

CBS and (especially) NBC have favored different parties each week, but our analytical databases are the lightest for those 2 networks. Their weighted averages currently favor the Democratic party (depicted in blue. with numerical ratings less than zero), but time will tell where they each level out at.

Not surprisingly, Fox News and MSNBC both show the largest partisan bias. Since Fox’s evening line-up does contain some “balanced” news programming (such as “Special Report with Bret Baier” and “The Fox Report with Shepard Smith”), the fact that their relative weighted slant rating is lower than MSNBC’s comes as no surprise. At some point, we may analyze the balanced news program category by itself to see how political messaging is interwoven within it.

Tomorrow, we will use this data as the basis for our weekly Impact Report to quantify the combined effects of bias and reach. As mentioned in previous posts, bias is not by itself determined by the number of media outlets delivering a slanted message. Rather, it is akin to the advertising concept of share of voice, in which the number of  ad impressions is combined with the total available inventory, as well as the size of the audience that is receiving it.

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