Charles A. Lyons is a professor emeritus of psychology at Eastern Oregon University, where he taught courses in abnormal psychology, behavior analysis, clinical interventions, psychological assessment, evolution and behavior, and human sexuality. He earned his PhD in psychology from Utah State University, with a specialization in the analysis of behavior. As a licensed clinical psychologist, he worked for several years with inpatient populations at a large state psychiatric facility, where he provided treatment, assessment, and forensic evaluations. As a researcher, he has published articles on animal behavior, basic learning processes, language, and addictive behaviors. His most recent research interests include social and compulsive gambling and large-scale public lotteries.

Barclay Martin received his Ph.D. in Psychology from Stanford University in 1953. He taught at the University of Wisconsin at Madison before joining the faculty at the University of North Carolina at Chapel Hill in 1971. The author of numerous articles and books, he retired in 1990.