Public Opinion Quarterly Advance Access originally published online on November 13, 2008
Public Opinion Quarterly 2008 72(4):768-780; doi:10.1093/poq/nfn057
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Experimenting with a "Third Way" in Political Knowledge Estimation
Address correspondence to Melissa K. Miller; e-mail: melissm{at}bgsu.edu.
Political knowledge is a key variable in the study of political behavior known to predict political discussion, voter turnout, issue-based voting, and support for democratic norms. Yet the appropriate method of measuring political knowledge is the subject of controversy. The traditional technique, which encourages survey respondents to say "don't know" (DK) if they are uncertain of the correct answer, has been called into question. Recent work has suggested that the DK response should be discouraged. We argue that a better design eliminates the DK option altogether. A web survey is employed utilizing an experimental design. Three different strategies for measuring political knowledge are tested: the first encourages the DK response; the second discourages the DK response; and the third omits the DK option. In its absence, nonrandom psychological factors are eliminated and estimates of political knowledge are higher in comparison to the other two strategies. Implications for measurement, methodology, and survey administration are discussed.
MELISSA K. MILLER AND SHANNON K. ORR are with the Political Science Department, Bowling Green State University, Bowling Green, OH 43403, USA. A previous version of this paper was presented at the 2006 Annual Meeting of the Midwest Political Science Association. The authors would like to thank participants on the "Questions of Measurement" panel, Peter Miller and Patricia Moy of Public Opinion Quarterly, three anonymous reviewers, Neil Englehart, and Marco Nardone for their comments and support for this research. This research was funded through the support of Hosted Survey. All errors and omissions are the responsibility of the authors.