First published in 1997. This book provides practitioners in the field of special education with the information they need to decide whether controversial diagnoses and treatments in this field are valid. The aim of this book is to review the literature on each topic and comment on the current state of the art of each in a way which is accessible to teachers, other professionals and parents. The book is of relevance to all teachers and other professionals who are concerned with the education of children with SEN, including teachers in mainstream and special schools.