Stephen Crain is Professor of Linguistics at the University of Maryland at College Park. He has written over sixty articles and is currently Associate Editor of two major journals in the field:
Language Acquisition and Linguistics and Philosophy. Diane Lillo-Martin is Associate Professor of Linguistics at the University of Connecticut at Storrs. She is the author of Language and Cognition: The View from Sign Language and Deafness (with Marschauk, Siple, Campbell, and Everhart, 1997) and Universal Grammar and American Sign Language: Setting the Null Argument Parameters, (1991).