• Knoll, J., Matthes, J., & Heiss, R. (accepted). The social media political participation model: A goal systems theory perspective. Convergence: The International Journal of Research into New Media Technologies.
  • Heiss, R. (forthcoming). Types of data. In J. Matthes, R. Potter & C. S. Davis (Eds.), International Encyclopedia of Communication Research Methods. Hoboken, NJ: Wiley-Blackwell.