The Promise of Discovery Episode 4: Paul Yoder: A career in helping children learn to talk Paul Yoder, Ph.D., retired from Vanderbilt University in late 2019. A long-time Vanderbilt Kennedy Center investigator, he studied communication and language and intervention in children with language delays. In this episode, Yoder discusses what he learned over the course of his career about young children and communication. Vanderbilt Kennedy Center Researcher: Paul Yoder, Ph.D., Professor of Special Education (Retired) Interviewer: Catherine Bush