Professor Ian Walker is an environmental psychologist at Swansea University in Wales. He works on people’s needs and behaviours in a range of real-world settings including transport, energy, water and buildings. His work has often focused on unconscious influences on people’s everyday actions, including habits, social norms and the influence of the built environment. He has extensive experience working with government, industry and the charity sector, and his work has been cited in a large number of policy documents internationally. Most recently, he was been working on identifying and explaining the concept of motonormativity — the unconscious process that leads people to make flawed judgements about motor transport.