Phase transitions in social impact models of opinion formation

Janusz Hołyst , Krzysztof Kacperski , Frank Schweitzer


We study phase transitions in models of opinion formation which are based on the social impact theory. Two different models are discussed: (i) a cellular-automata-based model of a finite group with a strong leader where persons can change their opinions but not their spatial positions, and (ii) a model with persons treated as active Brownian particles interacting via a communication field. In the first model, two stable phases are possible: a cluster around the leader, and a state of social unification. The transition into the second state occurs for a large leader strength and/or for a high level of social noise. In the second model, we find three stable phases, which correspond either to a “paramagnetic” phase (for high noise and strong diffusion), a “ferromagnetic” phase (for small nose and weak diffusion), or a phase with spatially separated “domains” (for intermediate conditions).
Author Janusz Hołyst (FP)
Janusz Hołyst,,
- Faculty of Physics
, Krzysztof Kacperski (FEIT / IT)
Krzysztof Kacperski,,
- The Institute of Telecommunications
, Frank Schweitzer - [Humboldt-Universitat zu Berlin]
Frank Schweitzer,,
Journal seriesPhysica A-Statistical Mechanics and Its Applications, ISSN 0378-4371
Issue year2000
Keywords in EnglishBrownian particles, Collective phenomena, Communication, Critical phenomena, Mean field approximation, Opinion formation, phase separation, Phase transition, Social impact model, Social systems
ASJC Classification3104 Condensed Matter Physics; 2613 Statistics and Probability
Score (nominal)30
Score sourcejournalList
Publication indicators WoS Citations = 85; GS Citations = 168.0; Scopus Citations = 96; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 1.253; WoS Impact Factor: 2006 = 1.311 (2) - 2007=1.469 (5)
Citation count*169 (2020-09-01)
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