Background: Posttraumatic growth is the concept that following a traumatic experience and the resulting struggle with significant adversity some people may start to view their experiences as a springboard for growth (Silva, Ownsworth, Shields, & Fleming, 2011). However, there is currently limited understanding of the process of how posttraumatic growth (PTG) develops following acquired brain injury (ABI). Method: This research explored the process of developing PTG following ABI. Semistructured interviews with 10 participants about their experience were transcribed and analysed according to a grounded theory method. Participants were recruited from a brain injury charity with the aim of involving them at every step of the research process. Results: The findings suggest a dynamic and fluid process in the development of PTG. Four themes were constructed from the data and comprise the model. These themes are interconnected and are: "living with a life changing injury", "trying to 'beat it' and acceptance", "identifying with a new you and others" and "meaningful positive change". Conclusion: PTG was described by the participants as a process of acceptance, identifying with others and developing new views of themselves and a changed perspective, leading to a belief that there is "life after brain injury". The theoretical model suggests that identity and relationships are a key process in the development of PTG. Whilst this is consistent with existing literature it also suggests the importance of shared experience which needs to be explored in more detail. Future directions and implications for rehabilitation are discussed. I would like to thank my supervisors, Dr Paul Fisher and Dr Fergus Gracey, for their knowledge, honesty and trust at all stages of the project, and when needed the most. I will always be grateful to the staff at Headway, and all those who were interested, for their enthusiasm and support, and for ensuring recruitment was possible-I never thought I would be oversubscribed. Last, but not least, I would like to express a heartfelt appreciation to the participants who gave up their time to be interviewed and to share their experiences. Not only would there be no project without you but your openness and enthusiasm were inspiring. Furthermore, I would like to say 'thank you' to my parents who spent many a weekend and evening looking after my son. Without your support this would not have been possible. Dedication This thesis is dedicated to my son, James, who inspires me with his imagination, curiosity, and resilience. Thank you for sharing with me your delight in surprises, and always trying to make me laugh with your jokes. 3. Research paper………………………………………………………………………..52 3.1 Acquired brain injury………………………………………………………….53 4. Comparison of acquired brain injury and spinal cord injury………………………...54 Research Paper…………………………………………………………………………….57 1. Abstract……………………………………………………………………………..59 2. Introduction…………………………………………………………………………60 3. Methodology………………………………………………………………………...63 3.1 Study design………………………...