1.
Saris W, Revilla M, Krosnick JA, Shaeffer EM. Comparing Questions with Agree/Disagree Response Options to Questions with Item-Specific Response Options. SRM [Internet]. 2010May1 [cited 2020Jun.5];4(1):61-9. Available from: https://ojs.ub.uni-konstanz.de/srm/article/view/2682