I have a new paper out, in collaboration with Brian Weeks and Rachel Neo, which argues that using partisan news sites can encourage users to adopt beliefs that are inconsistent with what they know about the evidence. The paper is forthcoming in the Journal of Computer-Mediated Communication, and an electronic version is available now:  dx.doi.org/10.1111/jcc4.12164.  An OSU press release summarizing the work is also available here: https://news.osu.edu/news/2016/08/10/media-wedge/