The impact of noise and topology on opinion dynamics in social networks
Open Access
- 7 April 2021
- journal article
- research article
- Published by The Royal Society in Royal Society Open Science
- Vol. 8 (4)
- https://doi.org/10.1098/rsos.201943
Abstract
We investigate the impact of noise and topology on opinion diversity in social networks. We do so by extending well-established models of opinion dynamics to a stochastic setting where agents are subject both to assimilative forces by their local social interactions, as well as to idiosyncratic factors preventing their population from reaching consensus. We model the latter to account for both scenarios where noise is entirely exogenous to peer influence and cases where it is instead endogenous, arising from the agents’ desire to maintain some uniqueness in their opinions. We derive a general analytical expression for opinion diversity, which holds for any network and depends on the network’s topology through its spectral properties alone. Using this expression, we find that opinion diversity decreases as communities and clusters are broken down. We test our predictions against data describing empirical influence networks between major news outlets and find that incorporating our measure in linear models for the sentiment expressed by such sources on a variety of topics yields a notable improvement in terms of explanatory power.Keywords
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Funding Information
- Engineering and Physical Sciences Research Council (EP/N006062/1)
This publication has 46 references indexed in Scilit:
- What Do Leaders Know?Entropy, 2013
- How Homophily Affects the Speed of Learning and Best-Response DynamicsThe Quarterly Journal of Economics, 2012
- Encountering “Difference” in the Contemporary Public Sphere: The Contribution of the Internet to the Heterogeneity of Political Discussion NetworksJournal of Communication, 2010
- Individualization as Driving Force of Clustering Phenomena in HumansPLoS Computational Biology, 2010
- Noisy continuous-opinion dynamicsJournal of Statistical Mechanics: Theory and Experiment, 2009
- What Motivates Nonconformity? Uniqueness Seeking Blocks Majority InfluencePersonality and Social Psychology Bulletin, 2008
- A COMPARISON OF FACTORS INFLUENCING ISSUE DIVERSITY IN THE U.S. AND TAIWANInternational Journal of Public Opinion Research, 1995
- The Social Self: On Being the Same and Different at the Same TimePersonality and Social Psychology Bulletin, 1991
- Reaching a ConsensusJournal of the American Statistical Association, 1974
- Investigating Causal Relations by Econometric Models and Cross-spectral MethodsEconometrica, 1969