Connectivism is a theory of learning based on the premise that knowledge exists in the world rather than in the head of an individual. Connectivism proposes a perspective similar to Vygotsky's Activity theory in that it regards knowledge as existing within systems which are accessed through people participating in activities. It bears some similarity with Bandura's Social Learning Theory that proposes that people learn through contact. The add-on "a learning theory for the digital age", that appears in Siemens' paper indicates the emphasis it gives to how technology affects how people live, how they communicate and how they learn.