1. Media Effects Research Lab, Media Studies Department, Donald P. Bellisario College of Communications, Pennsylvania State University , Pennsylvania, PA, USA
2. Democracy Research Unit, Political Science, College of Law & Public Administration, University of Salamanca , Salamanca, Spain
3. Centro de Investigación en Comunicación, Literatura y Observación Social (CICLOS), Facultad de Comunicación y Letras, Universidad Diego Portales , Santiago, Chile