Director of the Center on Children, Families and the Law and a psychology professor at the University of Nebraska. He reported on research findings that deal with both abstinence-only and comprehensive sex education.

The Rev. Paul Zahl is a former dean of Trinity Episcopal School for Ministry, a seminary in Ambridge, Pa. He opposes the ordination of sexually active gay clergy. Contact through Eerdmans Publishing Co.

Gregory Hall is president and CEO of Warner Southern College in Lake Wales, Fla.

Joseph A. Pipa, Jr. is president of Greenville Presbyterian Theological Seminary in Taylors, S.C., as well as a professor of historic and systematic theology.

Timothy D. Terrell is an associate professor of economics at Wofford College in South Carolina. He is a senior fellow with the Cornwall Alliance for the Stewardship of Creation.

David Legates is a professor in the geography department at the University of Delaware. His expertise includes hydroclimatology, computational methods and precipitation and climate change. He is a former director of the university’s Center for Climatic Research and a former Delaware state climatologist. Legates is a noted denier of human contribution to climate change.  

Paul de Vries is a speaker, author and president of New York Divinity School in New York City and an at-large member of the governing board of the National Association of Evangelicals.

The Rev. Clive Calver is senior pastor at Walnut Hill Community Church in Bethel, Conn., and former president of World Relief.

A psychology professor at DePaul University in Chicago. She is an expert on teen pregnancy and adolescent violence. She has conducted a large study on the effectiveness of school-based health clinics.