The consequences of brain injury are well documented and include a range of dif®culties across emotional, cognitive, physical, and social domains. In the social domain, loss of opportunity, support, or capacity to manage the demands of situations in the workplace, community, with family and friends is common. Research is beginning to focus on changes in both social and personal identity following brain injury, and theoretical frameworks are being drawn upon that allow consideration of the relationship between biological, psychological, and social factors. Social identity is de®ned by social roles, and group memberships and also provides an important means through which we form and maintain our sense of self (see Jetten, Haslam, & Haslam, this volume).