A Bottom-up Approach to Opinion Dynamics: a Cognitive Model

The study of opinions − e.g., their formation and change, and their effects on our society− by means of theoretical and numerical models has been one of the main goals of sociophysics until now, but it is one of the defining topics addressed by social psychology and complexity science. Despite the flourishing of different models and theories, several key questions still remain unanswered. Aim of this paper is to provide a cognitively grounded computational model of opinions in which they are described as mental representations and defined in terms of distinctive mental features. We also define how these representations change dynamically through different processes, describing the interplay between mental and social dynamics of opinions. We present two versions of the model, one with discrete opinions (voter model-like), and one with continuous ones (Deffuant-like). By means of numerical simulations, we compare the behaviour of our cognitive model with the classical sociophysical models, showing how consensus is reached in either.

[1]  W. Mcguire.  The vicissitudes of attitudes and similar representational constructs in twentieth century psychology , 1986 .

[2]  I. Crespi.  The public opinion process , 1997 .

[3]  S. Fortunato,et al.  Statistical physics of social dynamics , 2007, 0710.3256.

[4]  B. Latané,et al.  From private attitude to public opinion: A dynamic theory of social impact. , 1990 .

[5]  Seymour Sudman,et al.  Answering Questions: Methodology for Determining Cognitive and Communicative Processes in Survey Research , 1995 .

[6]  S. Moscovici,et al.  Social Influence And Social Change , 1976 .

[7]  Guillaume Deffuant,et al.  Interacting Agents and Continuous Opinions Dynamics , 2001, cond-mat/0111494.

[8]  Bikas K. Chakrabarti,et al.  Sociophysics: An Introduction , 2014 .

[9]  Martin Fishbein,et al.  Readings in attitude theory and measurement , 1968 .

[10]  Walter Quattrociocchi,et al.  Understanding opinions. A cognitive and formal account , 2011, ArXiv.

[11]  Christian Fleck.  Attitude: History of Concept , 2015 .

[12]  I. Ajzen,et al.  Belief, Attitude, Intention, and Behavior: An Introduction to Theory and Research , 1977 .

[13]  Serge Galam,et al.  SOCIOPHYSICS: A REVIEW OF GALAM MODELS , 2008, 0803.1800.

[14]  M. Zanna,et al.  Attitudes and Attitude Change , 1993 .

[15]  Eliot R. Smith,et al.  Situating Social Influence Processes: Dynamic, Multidirectional Flows of Influence Within Social Networks , 2007, Personality and social psychology review : an official journal of the Society for Personality and Social Psychology, Inc.

[16]  Guillaume Deffuant,et al.  Mixing beliefs among interacting agents , 2000, Adv. Complex Syst..

[17]  Dirk Helbing,et al.  Quantitative Sociodynamics: Stochastic Methods and Models of Social Interaction Processes , 2010 .