In the last decade, the significance of siblings in children's development and adjustment has been widely recognized, and research on brothers and sisters has increased dramatically. Bringing together exciting research on siblings by leading developmental psychologists and clinicians, this volume's contributions were originally presented at the First International Symposium on Siblings held in Leiden. This book focuses on both the significance of siblings as influences on individual development, and on the importance of the relationship in families with sick, disabled or troubled children. It covers the recent developmental research with chapters on the development of sibling relationships in early and middle childhood, the links between sibling relationships and those with parents, peers and friends, and the influence of siblings on children's adjustment. It then focuses on clinical issues such as siblings as sources of support for unhappy or sick children, or for children in disharmonious homes, and the vulnerability of siblings of disabled children. These clinical issues are discussed in practical terms by leading practitioners. Clear in presentation, comprehensive in its coverage of the exciting recent research, and full of practical insights, this volume brings to light important developmental principles, and raises questions regarding the assumptions about family processes and how different relationships within the family affect one another. For family researchers, those interested in the individual development of children, and for clinicians concerned about the impact of troubled or disabled children on their siblings or the potential of siblings as therapists, this book will be the key. No other book covers the recent research in this important topic and discusses the clinical issues in depth and in practical terms.