Human beings engage in information environments that are increasingly being powered by AI. Trust plays an important role in the use of AI and collaboration in human-AI systems. This unit covers two aspects within this context: (1) the social and cognitive principles and processes surrounding the establishment, maintenance, and repair of trust between humans and intelligent agents, machines, algorithms, and/or other emergent technologies, and (2) how interactions with AI shape human beliefs, perceptions, attitudes, and behaviours.