Opinion dynamics: models, extensions and external effects

  title={Opinion dynamics: models, extensions and external effects},
  author={Alina S{\^i}rbu and Vittorio Loreto and Vito Domenico Pietro Servedio and Francesca Tria},
Recently, social phenomena have received a lot of attention not only from social scientists, but also from physicists, mathematicians and computer scientists, in the emerging interdisciplinary field of complex system science. Opinion dynamics is one of the processes studied, since opinions are the drivers of human behaviour, and play a crucial role in many global challenges that our complex world and societies are facing: global financial crises, global pandemics, growth of cities, urbanisation… 
Opinion dynamics in social networks: From models to data
Attempts to validate idealized models of opinion dynamics with observational data and controlled sociological experiments may help to understand how to face current challenges that require the agreement of large groups of people in complex scenarios, such as economic inequality, climate change, and the ongoing fracture of the sociopolitical landscape.
Endogenous Changes in Public Opinion Dynamics
  • F. Medina
  • Economics
    J. Artif. Soc. Soc. Simul.
  • 2019
A multi-agent simulation model that could help to identify some mechanisms underlying changes in public opinion fluctuations is built and it is found that only scale-free networks show fluctuations inpublic opinion.
Noise induced unanimity and disorder in opinion formation
An opinion dynamics model based on Latané’s social impact theory is proposed, which shows that opinion formation and spread are influenced by both flow of information among actors and randomness in adopting opinions.
Opinion Dynamic Modeling of News Perception
A family of opinion dynamics models are proposed to understand the role of specific social factors on the acceptance/rejection of news contents and the effect that stubborn agents, different levels of trust among individuals, open-mindedness, attraction/repulsion phenomena, and similarity between agents have on the population dynamics of news perception.
Collective effects of the cost of opinion change
A second order phase transition is found in the region where a re-entrant consensus phase is observed in the heterogeneous Hegselmann–Krause model and the introduction of cost leads to a continuous decrease of the size of the largest opinion cluster.
Generating Strong Diversity of Opinions: Agent Models of Continuous Opinion Dynamics
Opinion dynamics is the study of how opinions in a group of individuals change over time. A goal of opinion dynamics modelers has long been to find a social sciencebased model that generates strong


Cohesion, Consensus and Extreme Information in Opinion Dynamics
A continuous model of opinion dynamics for multiple possible choices is analyzed, finding that when multiple external sources are allowed, consensus can emerge with one of them even when this is not extremely neutral, i.e., it carries a strong message, for a large range of initial conditions.
Opinion dynamics on interacting networks: media competition and social influence
This work introduces a sophisticated computational model of opinion dynamics which accounts for the coexistence of media and gossip as separated mechanisms and for their feedback loops and shows that plurality and competition within information sources lead to stable configurations where several and distant cultures coexist.
Opinion Dynamics with Disagreement and Modulated Information
A new model of opinion formation is introduced, which focuses on the interplay between the possibility of explicit disagreement, modulated in a self-consistent way by the existing opinions’ overlaps between the interacting individuals, and the effect of external information on the system.
Role of social environment and social clustering in spread of opinions in co-evolving networks
It is found that varying the shape of the distribution of probability of accepting or rejecting opinions can lead to the emergence of two qualitatively distinct final states, one having several isolated connected components each in internal consensus, allowing for the existence of diverse opinions, and the other having a single dominant connected component with each node within that dominant component having the same opinion.
What is a leader of opinion formation in bounded confidence models?
A new bounded confidence model is proposed and studied the self-formation of opinion in heterogeneous societies composed by agents of two psychological types, concord (C-) and partial antagonism (PA-) agents and found that in the C-society a leader showing high opinion tolerance has more control over the population.
Effects of mass media action on the Axelrod model with social influence.
The Axelrod model with social influence interaction is extended through the inclusion of a superagent which acts over the whole system and has non-null overlap with each agent of the society and might be relevant in several socioeconomic contexts and for the study of the emergence of collective behavior in complex social systems.
Opinion dynamics on an adaptive random network.
The classical model for voter dynamics in a two-party system with two basic modifications is revisited and criteria to determine whether consensus or polarization will be the outcome of the dynamics and on what time scales these states will be reached are established.
Effects Of Mass Media And Cultural Drift In A Model For Social Influence
In the context of an extension of Axelrod's model for social influence, we study the interplay and competition between the cultural drift, represented as random perturbations, and mass media,
Opinions Manipulation: Media, Power and Gossip
A socio-cognitive computational model of opinion dynamics where agents get informed by different sources of information, differing in both the contents and the perceived reliability of the messages spread is derived.