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Self-Identified Ideology Now Predicts Policy Positions, Turnout, and Vote

📊 Re-examining the ANES Extremes — the LibCon Question

The American National Election Study regularly asks respondents to place themselves on an "Extremely Liberal" to "Extremely Conservative" scale (LibCon). Responses to this routinely included question increasingly contain valid and useful information for a wide range of political analyses.

🧭 A New, More Nuanced Model of Full Response Patterns

  • The evidence is derived from a novel, more comprehensive and nuanced model of the full set of responses to the LibCon question.
  • That model examines the entire pattern of answers rather than treating the item in isolation, allowing a fuller assessment of what the LibCon scale captures.

🔎 Key Findings

  • LibCon responses in recent decades provide reliable summaries of respondents' positions on a range of specific policy issues.
  • Those self-placement responses are now strongly related to important political behaviors, including turnout and vote choice.
  • The pattern of results indicates that an increasingly broad segment of the population can and does understand and use the question's ideological labels.
  • These findings do not contradict earlier analyses that cautioned against using LibCon data; instead, they point to a change over time in how respondents interpret and employ ideological labels.

⚖️ Why This Matters for Research and Analysis

  • Researchers can view LibCon responses as a more informative measure today than in earlier decades, useful for analyses linking ideology to policy attitudes and political behavior.
  • The shift implies that survey-based measures of ideology have become more widely comprehensible and consequential for a broader population, with implications for study design and interpretation of historical comparisons.
Article Card
Revisiting Ideology Measures in Political Surveys was authored by Ken Kollman and John E. Jackson. It was published by Chicago in JOP in 2026.
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