Comparing belief certainty formats in the measurement of political knowledge
Year: 2026
Type: article
Abstract: Psychological certainty plays a role in how respondents retrieve and express their attitudes, beliefs, and opinions. This study compares two question formats that allow respondents to express certainty about their political knowledge. Using a YouGov sample ( N = 2,161), a single-item certainty-in-knowledge format, where political knowledge and belief certainty are measured jointly, and a branching format, where knowledge is measured first, followed by certainty in a separate question, are compared. The results show that the certainty-in-knowledge format significantly reduces the likelihood of respondents looking up answers online. Including a “Don’t Know” option does not increase gender differences. These findings demonstrate a question format that improves validity in online surveys by reducing measurement artifacts.
Author: Robert Vidigal
Institution: Vanderbilt University
Language: English
Subfield: Sociology and Political Science
Field: Social Sciences
Domain: Social Sciences
Open Access status: gold
Estimated APC paid: $3,550
OpenAlex ID: W7225649673