Much of his work lies at the interface between social psychology and human geography, and he has a particular interest in the dynamics of interracial contact, conflict, desegregation, and (re)segregation. His work has appeared in journals such as American Psychologist, Urban Studies, Ethnic and Racial Studies, Discourse and Society, the European Journal of Social Psychology, Political Psychology, Theory and Psychology, and the Journal of Environmental Psychology. He is currently co-editor (with Jolanda Jetten) of the British Journal of Social Psychology and is co-author (with Kevin Durrheim) of Racial Encounter: The Social Psychology of Contact and Desegregation. London: Routledge. He is a professor of social psychology at the Open University, UK.