My primary project is the development of an innovative, general approach to behaviour change called Behaviour Centred Design, based in evolutionary biology, reinforcement learning theory and ecological psychology. This approach has been used to develop behaviour change programs in hygiene, sanitation, nutrition and HIV. I am particularly interested in habit formation and the routinization of everyday behaviours such as personal hygiene behaviours. I have also developed a sensor-network based method for long-term naturalistic monitoring of behaviour, as well as a variety of qualitative methods for use in formative research.