Left Turn: How Liberal Media Bias Distorts the American Mind

A leading political science professor provides scientific proof of media bias in this sure-to-be-controversial book

Dr. Tim Groseclose, a professor of political science and economics at UCLA, has spent years constructing precise, quantitative measures of the slant of media outlets. He does this by measuring the political content of news, as a way to measure the PQ, or "political quotient" of voters and politicians.

Among his conclusions are: (i) all mainstream media outlets have a liberal bi...