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Echo chambers in social networks can form due to structural polarization, even in networks with hostile interactions between opposing groups. This study reveals a complex relationship between polarization and echo chamber formation.

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Area of Science:

  • Social network analysis
  • Computational social science
  • Information diffusion

Background:

  • Echo chambers are often linked to like-minded interactions.
  • Hostile interactions between opposing groups also play a role.
  • Polarization, defined by structural balance, is key to understanding echo chambers.

Purpose of the Study:

  • Investigate the role of polarization in echo chamber formation within signed networks.
  • Adapt information propagation models to include negative edges.
  • Analyze how antagonistic connections influence information framing.

Main Methods:

  • Generalized independent cascade and linear threshold models for signed networks.
  • Simulations incorporating negative edges to model information propagation.
  • Analysis of echo chamber emergence in balanced and antibalanced network structures.

Main Results:

  • Echo chambers emerge spontaneously in structurally balanced networks.
  • Echo chambers can also form in antibalanced networks under specific conditions.
  • Structural polarization and echo chambers exhibit a complex, non-linear relationship.

Conclusions:

  • Echo chambers are not solely dependent on like-minded interactions.
  • Polarization's role in echo chamber formation is nuanced and can be counterintuitive.
  • Findings hold across various network topologies and contagion models.