David A Sugden is Emeritus Professorin the School of Education at the University of Leeds, UK. His academic background is in developmental psychology, special education and physical education. His specialist research interests include motor development, motor impairment, motor learning, and children with developmental disorders. His work centres on the characteristics of typically developing children and those with various forms of impairment. He is co-author of the most widely used assessment instrument for motor difficulties, the Movement Assessment Battery for Children. His publications range from pure research to professional practice. He reviews for government research councils, in UK, USA, Canada, Australia, Hong Kong and Singapore and for many journals. He has successfully supervised over 40 PhD students.

Michael G Wade is currently Professor in the School of Kinesiology University of Minnesota Twin Cities, USA. Professor Wade's research interests focus on human movement in general and more specifically on the coordination and control of skill in normal and abnormal human movement across the lifespan. His published research addresses atypical children with both intellectual disabilities and those with dyspraxia. He has published continuously from 1968 to the present, including over 100 journal articles, book chapters, and books, both edited and authored. Dr Wade is a Fellow of the American Academy of Kinesiology and is a Past President of the North American Society for the Psychology of Sport and Physical Activity.