Ruth E. Cook is a Professor of Early Childhood Special Education, at Santa Clara Univeristy in Santa Clara, California.
Dr. M. Diane Klein is a speech and language pathologist, as well as a professor of early childhood special education. She is a member of various professional organizations including the Council on Exceptional Children, the American Speech Language Hearing Association, and the Division for Childhood Communication Disorders. She is a frequent lecturer at conventions and seminars and is the keynote speaker for the Southwest Los Angeles County Special Education Preschool Staff Development conference in April 2000.