Roger Kreuz and Richard Roberts
Roger Kreuz is an Associate Dean and Director of Graduate Studies in the College of Arts and Sciences and Professor of Psychology at the University of Memphis.
Richard M. Roberts is a U.S. diplomat currently serving as the Public Affairs Officer at the U.S. Consulate General in Okinawa, Japan.
They are co-authors of "Becoming Fluent: How Cognitive Science Can Help Adults Learn a Foreign Language," "Getting Through: The Pleasures and Perils of Cross-Cultural Communication," and "Changing Minds: How Aging Affects Language and How Language Affects Aging" (all published by the MIT Press).