Patricia Elizabeth Spencer has been a teacher, assessment specialist, and educational advocate for deaf and hard-of-hearing students (including those with multiple learning challenges) across the age range of infancy through post-graduate levels. Her work at the Gallaudet Research Institute focused on early interaction, play, and language development. She has worked internationally as a researcher and educational consultant and has written extensively on issues related to development and education of deaf and hard-of-hearing children.
Lynne Sanford Koester retired after 25 years of teaching developmental psychology at the University of Montana and at the University of North Carolina-Greensboro. She has also worked in Ethiopia, Austria, and Germany, and is the former Director of the Intercultural Youth and Family Development graduate program at her university. Her research has focused primarily on infant development within the family context - parenting behaviors and cultural influences, early parent-child interactions, and intuitive parenting.