Joint action is a research concept and field dedicated to understanding how multiple agents coordinate their behavior towards shared goals. It investigates the cognitive, neural, and behavioral mechanisms enabling this coordination, including mutual prediction, communication, and the formation of shared representations or intentions. Key characteristics involve the interdependence of agents and the dynamic adaptation of individual actions within the collective activity. The significance of studying joint action lies in its contribution to theories of social cognition, interactive systems design, and the fundamental nature of collaborative intelligence.