Accessible Unlicensed Requires Authentication Published by De Gruyter June 9, 2018

Who is Ideological? Measuring Ideological Consistency in the American Public

Michael Barber and Jeremy C. Pope
From the journal The Forum


Political constraint and issue consistency are key variables in the study of public opinion, but the existing literature contains many parallel but contradictory accounts of the sources and predictors of ideological constraint. Some posit that constraint is essentially a function of a person’s partisan commitment, others suggest it is rooted in participation in politics, while others see a wide range of correlates summarized as “sophistication.” Still others deny that constraint exists in the mass public altogether. Contrary to these accounts, we argue that issue consistency exists within the American public and is best predicted by political knowledge, which should be thought of as separate from those other predictors. In fact, after accounting for political knowledge, other variables like partisanship, participation, and demographic variables have little independent relationship to ideological constraint. The data show that political knowledge is about as strong a predictor of issue consistency as is one’s self-placed ideology – a widely used proxy for constraint. These results help us understand how citizens think about politics and which groups of people most closely resemble elites in the structure of their opinions. Our findings show that previously hypothesized predictors of constraint – particularly partisanship and participation – are mainly related to ideological constraint through a person’s level of political knowledge.


Abramowitz, Alan I. 2012. The Disappearing Center: Engaged Citizens, Polarization, American Democracy. New Haven, CT: Yale University Press.Search in Google Scholar

Abramowitz, Alan I. 2013. The Polarized Public? Why American Government Is So Dysfunctional. New York, NY: Pearson.Search in Google Scholar

Achen, Christopher H., and Larry M. Bartels. 2016. Democracy for Realists: Why Elections Do Not Produce Responsive Government. Princeton, NJ: Princeton University Press.Search in Google Scholar

Ahler, Douglas J., and David E. Broockman. 2016. “Does Elite Polarization Imply Poor Representation? A New Perspective on the “Disconnect” Between Politicians and Voters.” Working Paper: .Search in Google Scholar

Ansolabehere, Stephen, Jonathan Rodden, and James M. Snyder. 2008. “The Strength of Issues: Using Multiple Measures to Gauge Preference Stability, Ideological Constraint, and Issue Voting.” American Political Science Review 102 (2): 215–232.Search in Google Scholar

Bafumi, Joseph, and Michael Herron. 2010. “Leapfrog Representation and Extremism: A Study of American Voters and their Members in Congress.” American Political Science Review 104 (3): 519–542.Search in Google Scholar

Baldassarri, Delia, and Andrew Gelman. 2008. “Partisans without Constraint: Political Polarization and Trends in American Public Opinion.” American Journal of Sociology 114 (2): 408–446.Search in Google Scholar

Bartels, Larry M. 2000. “Partisanship and Voting Behavior, 1952–1996.” American Journal of Political Science 44 (1): 35–50.Search in Google Scholar

Bartels, Larry M. 2008. “The Irrational Electorate.” Wilson Quarterly 32 (4): 44–50.Search in Google Scholar

Bauer, Paul C., Pablo Barberá, Kathrin Ackermann, and Aaron Venetz. 2016. “Is the Left-Right Scale a Valid Measure of Ideology?” Political Behavior 39 (3): 553–583.Search in Google Scholar

Bishop, Bill. 2009. The Big Sort: Why the Clustering of Like-Minded American is Tearing us Apart. Wilmington, MA: Mariner Books.Search in Google Scholar

Broockman, David E. 2016. “Approaches to Studying Policy Representation.” Legislative Studies Quarterly 41 (1): 181–215.Search in Google Scholar

Campbell, James E. 2016. Polarized: Making Sense of a Divided America. Princeton, NJ: Princeton University Press.Search in Google Scholar

Campbell, James E., and Carl M. Cannon. 2006. “Polarization Runs Deep, Even by Yesterday’s Standards.” Red and Blue Nation? Characteristics and Causes of America’s Polarized Politics 1: 72–85.Search in Google Scholar

Clinton, Joshua, Simon Jackman, and Doug Rivers. 2004. “The Statistical Analysis of Roll Call Data.” American Political Science Review 98 (2): 355–370.Search in Google Scholar

Converse, Philip. 1964. “The Nature of Belief Systems in Mass Publics.” In Ideology and Its Discontents, edited by David E. Apter, 1–74. New York: The Free Press of Glencoe.Search in Google Scholar

Ellis, Christopher, and James A. Stimson. 2012. Ideology in America. New York, NY: Cambridge University Press.Search in Google Scholar

Freeder, Sean, Gabriel S. Lenz, and Shad Turney. 2016. “The Importance of Knowing ‘What Goes With What’.” Working Paper. Available at: dd078ce239f1bde1d010.pdf.Search in Google Scholar

Grossmann, Matt, and David A. Hopkins. 2015. “Ideological Republicans and Group Interest Democrats: The Asymmetry of American Party Politics.” Perspectives on Politics 13 (1): 119–139.Search in Google Scholar

Grossmann, Matt, and David A. Hopkins. 2016. Asymmetric Politics: Ideological Republicans and Group Interest Democrats. New York, NY: Oxford University Press.Search in Google Scholar

Hacker, Jacob S., and Paul Pierson. 2014. “After the “Master Theory”: Downs, Schattschneider, and the Rebirth of Policy-Focused Analysis.” Perspectives on Politics 12 (3): 643–662.Search in Google Scholar

Hetherington, Marc J. 2001. “Resurgent Mass Partisanship: The Role of Elite Polarization.” The American Political Science Review 95 (3): 619–631.Search in Google Scholar

Hill, Seth J. 2015. “Institution of Nomination and the Policy Ideology of Primary Electorates.” Quarterly Journal of Political Science 10 (4): 461–487.Search in Google Scholar

Iyengar, Shanto, Gaurav Sood, and Yphtach Lelkes. 2012. “Affect, Not IdeologyA Social Identity Perspective on Polarization.” Public Opinion Quarterly 76 (3): 405–431.Search in Google Scholar

Jacobson, Gary. 2012. “The Electoral Origins of Polarized Politics: Evidence From the 2010 Cooperative Congressional Election Study.” American Behavioral Scientist 56 (12): 1612–1630.Search in Google Scholar

Jacoby, William G. 1995. “The Structure of Ideological Thinking in the American Electorate.” American Journal of Political Science 39: 314–335.Search in Google Scholar

Jennings, M. Kent. 1992. “Ideological Thinking among Mass Publics and Political Elites.” Public Opinion Quarterly 56 (4): 419–441.Search in Google Scholar

Jessee, Stephen A. 2009. “Spatial Voting in the 2004 Presidential Election.” American Political Science Review 103 (1): 59–81.Search in Google Scholar

Kinder, Donald, and Nathan Kalmoe. 2017. Neither Liberal Nor Conservative: Ideological Innocence in the American Public. Chicago, IL: University of Chicago Press.Search in Google Scholar

Klein, Ezra. 2014. “The Single Most Important Fact about American Politics.” URL: .Search in Google Scholar

Knight, Kathleen. 1985. “Ideology in the 1980 Election: Ideological Sophistication Does Matter.” The Journal of Politics 47 (3): 828–853.Search in Google Scholar

Lane, Robert E. 1962. Political Ideology: Why the American Common Man Believes What He Does. New York, NY: The Free Press.Search in Google Scholar

Layman, Geoffrey C., and Thomas M. Carsey. 2002. “Party Polarization and ‘Conflict Extension’ in the American Electorate.” American Journal of Political Science 46 (4): 786–802.Search in Google Scholar

Layman, Geoffrey C., Thomas M. Carsey, and Juliana Menasce Horowitz. 2006. “Party Polarization in American Politics: Characteristics, Causes, and Consequences.” Annual Review of Political Science 9: 83–110.Search in Google Scholar

Lenz, Gabriel S. 2012. Follow the Leader? How Voters Respond to Politicians’ Policies and Performance. Chicago, IL: University of Chicago Press.Search in Google Scholar

Lewis, Jeffrey B., and Chris Tausanovitch. 2015. When Does Joint Scaling Allow For Direct Comparisons of Preferences. In Conference on Ideal Point Models, Massachusetts Institute of Technology, Cambridge, MA, May. Vol. 1.Search in Google Scholar

Lupton, Robert N., William N. Myers, and Judd R. Thornton. 2015. “Political Sophistication and the Dimensionality of Elite and Mass Attitudes, 1980–2004.” Journal of Politics 77 (2): 368–380.Search in Google Scholar

Luskin, Robert C. 1990. “Explaining Political Sophistication.” Political Behavior 12 (4): 331–361.Search in Google Scholar

Mann, Thomas E., and Norman J. Ornstein. 2012. It’s Even Worse Than It Looks: How the American Constitutional System Collided with the New Politics of Extremism. New York, NY: Basic Books.Search in Google Scholar

McCarty, Nolan, Keith Poole, and Howard Rosenthal. 2006. Polarized America: The Dance of Ideology and Unequal Riches. Cambridge, MA: MIT Press.Search in Google Scholar

McGhee, Eric, Seth Masket, Boris Shor, Steven Rogers, and Nolan McCarty. 2014. “A Primary Cause of Partisanship? Nomination Systems and Legislator Ideology.” American Journal of Political Science 58 (2): 337–351.Search in Google Scholar

Noel, Hans. 2013. Political Ideologies and Political Parties in America. New York, NY: Cambridge University Press.Search in Google Scholar

Peress, Michael. 2013. “Candidate Positioning and Responsiveness to Constituent Opinion in the US House of Representatives.” Public Choice 156 (1–2): 77–94.Search in Google Scholar

Sniderman, Paul M., and Edward H. Stiglitz. 2012. The Reputational Premium: A Theory of Party Identification and Policy Reasoning. Princeton, NJ: Princeton University Press.Search in Google Scholar

Stimson, James A. 1975. “Belief Systems: Constraint, Complexity, and the 1972 Election.” American Journal of Political Science 19 (3): 393–417.Search in Google Scholar

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Published Online: 2018-6-9

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