Giorgia Morgese is Teaching Professor of General Psychology in the Department of Human Science, LUMSA University of Rome, and staff member of Archivio di Storia della Psicologia, Sapienza University of Rome. Giovanni Pietro Lombardo is Full Professor of the History of Science and Scientific Manager of Archivio di Storia della Psicologia, Sapienza University of Rome. Hendrika Vande Kemp is a clinical psychologist, family therapist, and historian of psychology. Formerly a professor of psychology at Fuller Theological Seminary, she is now an independent scholar and is currently writing a book about Lydiard Horton.