1. School of Journalism and Media, The University of Texas at Austin, Austin, TX, USA
2. Center for Media Engagement, The University of Texas at Austin, Austin, TX, USA
3. Department of Social Sciences, Heinrich Heine University of Düsseldorf, Düesseldorf, Germany
4. Department of Communication, Johannes Gutenberg University of Mainz, Mainz, Germany
5. Department of Media, Knowledge and Communication, University of Augsburg, Augsburg, Germany