# Community Detection **Entity class:** Graph-analytic method **Maturity:** Developed ## Definition **Community detection** identifies clusters of nodes that are more densely connected to one another than to the rest of a graph. In counterterrorism it can surface cells or affinity groups, but clusters require contextual validation because families, workplaces, journalists, service providers, and ordinary communities also form dense graphs. ## Relationships - **part of:** [[wiki/Graph Analytics|Graph Analytics]] and [[wiki/Social Network Analysis|Social Network Analysis]]. - **applied to:** [[wiki/Dark Network|Dark Network]] and [[wiki/Complex Contagion|Complex Contagion]]. - **requires:** [[wiki/Entity Resolution|Entity Resolution]]. ## Sources / Provenance - [[research/A Network-Epidemiological Analysis of Radicalization and Real-Time Counterterrorism Observability|Network-Epidemiological Analysis]]