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Self-Persuasion: Evidence from Field Experiments at International Debating Competitions

Author

Listed:
  • Schwardmann, Peter

    (Carnegie Mellon University)

  • Tripodi, Egon

    (University of Essex and JILAEE)

  • van der Weele, Joël J.

    (University of Amsterdam and Tinbergen Institute)

Abstract

Laboratory evidence shows that when people have to argue for a given position, they persuade themselves about the position’s factual and moral superiority. Such self-persuasion limits the potential of communication to resolve conflict and reduce polarization. We test for this phenomenon in a field setting, at international debating competitions that randomly assign experienced and motivated debaters to argue one side of a topical motion. We find self-persuasion in factual beliefs and confidence in one’s position. Effect sizes are smaller than in the laboratory, but robust to a one-hour exchange of arguments and a ten-fold increase in incentives for accuracy.

Suggested Citation

  • Schwardmann, Peter & Tripodi, Egon & van der Weele, Joël J., 2021. "Self-Persuasion: Evidence from Field Experiments at International Debating Competitions," Rationality and Competition Discussion Paper Series 306, CRC TRR 190 Rationality and Competition.
    • Handle: RePEc:rco:dpaper:306
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    JEL classification:

    • C93 - Mathematical and Quantitative Methods - - Design of Experiments - - - Field Experiments
    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making

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