SKM 2023 – scientific programme
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SOE: Fachverband Physik sozio-ökonomischer Systeme
SOE 19: Social Systems, Opinion and Group Dynamics II
SOE 19.5: Talk
Thursday, March 30, 2023, 17:45–18:00, ZEU 260
The emergence of echo-chambers in spatial collective estimation with limited connectivity — •Mohsen Raoufi1, Heiko Hamann2, and Pawel Romanczuk1 — 1Department of Biology, Humboldt Universität zu Berlin, Berlin, Germany — 2Department of Computer and Information Science, University of Konstanz, Konstanz, Germany
Using a method inspired by the wisdom-of-crowds effect [1] we study the speed-vs-accuracy tradeoffs (SAT) in a spatial collective estimation scenario. In this work, we highlight the link between the speed-vs-accuracy and exploration-vs-exploitation tradeoffs. Here we elaborate upon the role of network connectivity in the tradeoffs. On one hand, the network structure influences the dynamics of consensus-making in collectives. On the other, agents modify the network based on their opinion. We model this behaviour of agents based on homophily--the tendency of nodes to establish links with other like-minded nodes. This co-evolution of the network structure and opinion of agents shows rich dynamics, even for spatial networks. In particular, we demonstrate that in systems with limited connectivity, homophily can lead to the emergence of echo-chambers, which prevents consensus. Our focus for future work is to provide solutions within the capability of agents to bring global connectivity and thus the consensus back to the collective. [1] Raoufi, M., et. al. Speed-vs-Accuracy Tradeoff in Collective Estimation: An Adaptive Exploration-Exploitation Case. In 2021 International Symposium on Multi-Robot and Multi-Agent Systems (MRS) (pp. 47-55). IEEE.