Tim Muehlhoff (PhD, University of North Carolina at Chapel Hill) is a professor of communication at Biola University in La Mirada, California, where he teaches classes in family communication, interpersonal communication, persuasion, and gender. He is the author of I Beg to Differ and Marriage Forecasting, and the coauthor of The God Conversation: Using Stories and Illustrations to Explain Your Faith and Authentic Communication: Christian Speech Engaging Culture. Muehlhoff and his wife, Noreen, are frequent speakers at FamilyLife Marriage Conferences, and he has served with Campus Crusade since 1986. They live in Brea, California, with their three boys.