Saris, Willem, Melanie Revilla, Jon A. Krosnick, and Eric M. Shaeffer. “Comparing Questions With Agree Disagree Response Options to Questions With Item-Specific Response Options”. Survey Research Methods 4, no. 1 (May 1, 2010): 61–79. Accessed November 24, 2024. https://ojs.ub.uni-konstanz.de/srm/article/view/2682.