Marc Marschark is a Professor at the National Technical Institute for the Deaf, where he is Director of the Center for Education Research Partnerships. He has written or edited over 20 books and published over 100 articles and chapters. His current research focuses on relations of language and learning by deaf children and adults in formal and informal educational settings. Peter C. Hauser is an Associate Professor at the National Technical Institute for the Deaf. A deaf clinical neuropsychologist, he is the director of the Deaf Studies Laboratory (DSL) where he supervises deaf, hard-of-hearing, and hearing students who obtain hands-on experience developing, running, and analyzing experimental psychological studies.