Harry Knoors, Ph.D., is a professor at the Behavioural Science Institute of the Radboud University Nijmegen, the Netherlands, and Academic Director at Royal Dutch Kentalis. Knoors is trained as a psycholinguist, specializing in language and literacy of deaf children. He is involved in research on childhood deafness (mainly language, literacy, and psychosocial development) and research on the effectiveness of special education.
Marc Marschark, Ph.D., is a professor at the National Technical Institute for the Deaf, a college of Rochester Institute of Technology, where he directs the Center for Education Research Partnerships. His primary interest is in relations among language, learning, and cognition; current research focuses on such relations among deaf children and adults in formal and informal educational settings.