Hope, Steven, Pamela Campanelli, Gerry Nicolaas, Peter Lynn, and Annette Jäckle. “The Role of the Interviewer in Producing Mode Effects: Results From a Mixed Modes Experiment Comparing Face-to-Face, Telephone and Web Administration”. Survey Research Methods 16, no. 2 (August 10, 2022): 207–226. Accessed March 29, 2024. https://ojs.ub.uni-konstanz.de/srm/article/view/7771.