Ariel Knafo is an associate professor at the Psychology Department, The Hebrew University of Jerusalem. His research focuses on the development and consequences of values and of prosocial behavior, combining approaches from developmental, social, and cross-cultural psychology. His doctoral work at The Hebrew University on intergenerational value transmission, has evolved into current research on how value priorities in adolescence develop in different contexts, considering different aspects opf adoelscetns' identity.

Dr. Charles S. Carver is a Distinguished Professor of Psychology at the University of Miami. His work addresses a wide range of topics in personality, social psychology, health psychology, and experimental psychopathology. (He is not a dilettante, he is eclectic.) He has been supported by the National Science Foundation, the American Cancer Society, and the National Cancer Institute. He was Editor of the Journal of Personality and Social Psychology's section on Personality Processes and Individual Differences and is now Associate Editor of Psychological Review.