This volume is a collection of original chapters by a group of authors at the leading UK research and treatment centre on PTSD dealing with the diagnosis and context of PTSD, psychological mechanisms and behaviour, and strategies for therapy and prevention. Drawing on ten years intensive experience with adults and children presenting with PTSD and other disorders following a series of disasters, Yule emphasises the cognitive behavioural approach to PTSD and integrates important perspectives from social psychology, experimental cognitive psychology, neuropsychology and developmental psychology. Cross-cultural issues and issues in planning emergency responses to disasters are discussed. The controversy surrounding various short term and crisis interventions is critically presented.