# Filter Bubble **Entity class:** Personalized-information environment concept **Maturity:** Developed ## Definition A **filter bubble** is a personalized information environment in which selection systems and user behavior narrow the range of material encountered. It differs from an echo chamber: filtering concerns exposure, while echo-chamber dynamics concern social reinforcement and rejection of outside correction. ## Relationships - **affected by:** [[wiki/Algorithmic Amplification|Algorithmic Amplification]]. - **related to:** [[wiki/Echo Chamber|Echo Chamber]] and [[wiki/Homophily|Homophily]]. - **counterterrorism relevance:** [[wiki/Countering Violent Extremism|CVE]] and [[wiki/SOCMINT|SOCMINT]]. ## Sources / Provenance - [[research/A Network-Epidemiological Analysis of Radicalization and Real-Time Counterterrorism Observability|Network-Epidemiological Analysis]]