A REJECTION MECHANISM IN 2D BOUNDED CONFIDENCE PROVIDES MORE CONFORMITY

S. Huet (), G. Deffuant () and W. Jager ()
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S. Huet: Cemagref, Laboratoire d'Ingénierie des Systèmes Complexes, 63172 Aubière, France
G. Deffuant: Cemagref, Laboratoire d'Ingénierie des Systèmes Complexes, 63172 Aubière, France
W. Jager: Faculty of Economics and Business, University of Groningen, The Netherlands

Advances in Complex Systems (ACS), 2008, vol. 11, issue 04, 529-549

Abstract: This paper explores the dynamics of attitude change in two dimensions resulting from social interaction. We add a rejection mechanism into the 2D bounded confidence (BC) model proposed by Deffuantet al.(2001). Individuals are characterized by two-dimensional continuous attitudes, each associated with an uncertaintyu, supposed constant in this first study. Individuals interact through random pairs. If their attitudes are closer thanuon both dimensions, or further thanuon both dimensions, or closer thanuon one dimension and not further thanu + δ uon the other dimension, then the rules of the BC model apply. But if their attitudes are closer thanuon one dimension and further thanu + δ uon the other dimension, then the individuals are in a dissonant state. They tend to solve this problem by shifting away their close attitudes. The model shows metastable clusters, which maintain themselves through opposite influences of competitor clusters. Our analysis and first experiments support the hypothesis that, for a large range of uncertainty values, the number of clusters grows linearly with the inverse of the uncertainty, whereas this growth is quadratic in the BC model.

Keywords: Opinion dynamics; bounded confidence model; attraction and rejection; consensus; multidimensional (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (9)

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DOI: 10.1142/S0219525908001799

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