||Intentionality is the property of being about, directed at, or representing events, objects, properties and states of affairs. The mind is the original source of intentionality. The study of collective intentionality is the study of intentionality in the social context. What is distinctive about the study of collective intentionality within the broader study of social interactions and structures is its focus on the conceptual and psychological features of joint or shared actions and attitudes, that is, actions and attitudes of (or apparent attributions of such to) groups or collectives, their relations to individual actions and attitudes, and their implications for the nature of social groups and their functioning. It subsumes the study of collective action, responsibility, reasoning, thought, intention, emotion, phenomenology, decision-making, knowledge, trust, rationality, cooperation, competition, and related issues, as well as how these underpin social practices, organizations, conventions, institutions and social ontology. Collective intentionality is a rapidly growing interdisciplinary area of research that draws on philosophy, logic, linguistics, cognitive science, sociology, computer science, psychology, economics, political science, legal theory, and cultural and evolutionary anthropology.