Robert F. Krueger, Ph.D., is Hathaway Distinguished Professor in the Department of Psychology at the University of Minnesota. He completed his undergraduate and graduate work at the University of Wisconsin, Madison, and his clinical internship at Brown University. Professor Krueger's major interests lie at the intersection of research on personality, psychopathology, disorders of personality, psychometrics, and behavior genetics.

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.