Publikation: An agent-based model of multi-dimensional opinion dynamics and opinion alignment
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It is known that individual opinions on different policy issues often align to a dominant ideological dimension (e.g., left vs right) and become increasingly polarized. We provide an agent-based model that reproduces alignment and polarization as emergent properties of opinion dynamics in a multi-dimensional space of continuous opinions. The mechanisms for the change of agents’ opinions in this multi-dimensional space are derived from cognitive dissonance theory and structural balance theory. We test assumptions from proximity voting and from directional voting regarding their ability to reproduce the expected emerging properties. We further study how the emotional involvement of agents, i.e., their individual resistance to change opinions, impacts the dynamics. We identify two regimes for the global and the individual alignment of opinions. If the affective involvement is high and shows a large variance across agents, this fosters the emergence of a dominant ideological dimension. Agents align their opinions along this dimension in opposite directions, i.e., create a state of polarization.
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SCHWEIGHOFER, Simon, David GARCIA, Frank SCHWEITZER, 2020. An agent-based model of multi-dimensional opinion dynamics and opinion alignment. In: Chaos. American Institute of Physics (AIP). 2020, 30(9), 093139. ISSN 1054-1500. eISSN 1089-7682. Available under: doi: 10.1063/5.0007523BibTex
@article{Schweighofer2020agent-59848,
year={2020},
doi={10.1063/5.0007523},
title={An agent-based model of multi-dimensional opinion dynamics and opinion alignment},
number={9},
volume={30},
issn={1054-1500},
journal={Chaos},
author={Schweighofer, Simon and Garcia, David and Schweitzer, Frank},
note={Article Number: 093139}
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<dcterms:abstract xml:lang="eng">It is known that individual opinions on different policy issues often align to a dominant ideological dimension (e.g., left vs right) and become increasingly polarized. We provide an agent-based model that reproduces alignment and polarization as emergent properties of opinion dynamics in a multi-dimensional space of continuous opinions. The mechanisms for the change of agents’ opinions in this multi-dimensional space are derived from cognitive dissonance theory and structural balance theory. We test assumptions from proximity voting and from directional voting regarding their ability to reproduce the expected emerging properties. We further study how the emotional involvement of agents, i.e., their individual resistance to change opinions, impacts the dynamics. We identify two regimes for the global and the individual alignment of opinions. If the affective involvement is high and shows a large variance across agents, this fosters the emergence of a dominant ideological dimension. Agents align their opinions along this dimension in opposite directions, i.e., create a state of polarization.</dcterms:abstract>
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