# Echo Chamber **Entity class:** Information-network concept **Maturity:** Developed ## Definition An **echo chamber** is a social and media environment in which repeated, mutually reinforcing messages dominate and correction from outside the group is discounted. Dense reinforcement can support complex contagion, but the label should be demonstrated from network and interaction evidence rather than assumed from ideological similarity. ## Relationships - **supports:** [[wiki/Complex Contagion|Complex Contagion]] and [[wiki/Radicalization as Social Contagion|Radicalization as Social Contagion]]. - **affected by:** [[wiki/Algorithmic Amplification|Algorithmic Amplification]] and [[wiki/Homophily|Homophily]]. - **related to:** [[wiki/Filter Bubble|Filter Bubble]]. ## Sources / Provenance - [[research/A Network-Epidemiological Analysis of Radicalization and Real-Time Counterterrorism Observability|Network-Epidemiological Analysis]]