Expanding the Scope of Selective Exposure: An Objective Approach to Measurement of Media Ideology

The literature on selective exposure has made inestimable advances in our understanding of media and its effect on politics and the general public. However, much of the research on this topic has relied on potentially inaccurate assumptions. In our paper we apply an open-source, publicly available, high-dimensional measurement of meaning through word co-occurrence context (Shaoul & Westbury, 2010), which has historically been applied to questions of semantic relationships between words. This method allows scholars to avoid pitfalls from previous assumptions and determine previously unknown ideological positions of previously unknown sources. We demonstrate the validity and range of this method and provide a series of best practices for scholars who wish to employ this tool in their own research. Our method will ultimately expand the variety of research questions available as well as improving inferences, opening up new lines of research for scholars studying media consumption and political behavior.