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Interplay between social debate and propaganda in an opinion formation model

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  • Gimenez, M.C.
  • Revelli, J.A.
  • Lama, M.S. de la
  • Lopez, J.M.
  • Wio, H.S.
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    Abstract

    We introduce a simple model of opinion dynamics in which a two-state agent modified Sznajd model evolves due to the simultaneous action of stochastic driving and a periodic signal. The stochastic effect mimics a social temperature, so the agents may adopt decisions in support for or against some opinion or position, according to a modified Sznajd rule with a varying probability. The external force represents a simplified picture by which society feels the influence of the external effects of propaganda. By means of Monte Carlo simulations we have shown the dynamical interplay between the social condition or mood and the external influence, finding a stochastic resonance-like phenomenon when we depict the noise-to-signal ratio as a function of the social temperature. In addition, we have also studied the effects of the system size and the external signal strength on the opinion formation dynamics.

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    Bibliographic Info

    Article provided by Elsevier in its journal Physica A: Statistical Mechanics and its Applications.

    Volume (Year): 392 (2013)
    Issue (Month): 1 ()
    Pages: 278-286

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    Handle: RePEc:eee:phsmap:v:392:y:2013:i:1:p:278-286

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    Web page: http://www.journals.elsevier.com/physica-a-statistical-mechpplications/

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    Keywords: Sznajd model; Stochastic resonance;

    References

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    1. Galam, Serge, 2004. "Contrarian deterministic effects on opinion dynamics: “the hung elections scenario”," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 333(C), pages 453-460.
    2. Tessone, Claudio J. & Toral, Raúl, 2005. "System size stochastic resonance in a model for opinion formation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 351(1), pages 106-116.
    3. Stauffer, D. & Sá Martins, J.S., 2004. "Simulation of Galam's contrarian opinions on percolative lattices," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 334(3), pages 558-565.
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