Dan Gottlieb is a psychologist and marital therapist and has been in practice nearly 40 years. His career started in community mental health and substance abuse until his accident in 1979 made him a quadriplegic. Since that time, he has been in private practice. Since 1985, he has been hosting a radio show called "Voices in the Family" on WHYY FM, Philadelphia's NPR affiliate. He was a regular columnist for the Philadelphia Inquirer from 1994 until 2008. He is also the author of four books.