On the Psychology of Individual Differences: Toward a ''Differential Psychology''

About L. William Stern

L. William Stern (1871 1938) was a German scholar whose hallmark contribution to psychology was in his own view a comprehensive system of thought he called 'critical personalism.' Within that system Stern offered a philosophically sophisticated understanding of the psychological development of human personalities and by extension a vision of the dynamics of socio-ethically flourishing human communities. Serge Nicolas is Professor of psychology at the Université Paris Cité and a senior member of the Institut Universitaire de France (IUF). Professor Nicolas research interests include experimental psychology the history of French and German psychology and Alfred Binet. He has published numerous articles and books on William Stern in French and English including William Stern and the establishment of a psychology of testimony in Germany in European Yearbook of the History of Psychology (2022). James T. Lamiell is Professor Emeritus of psychology at Georgetown University USA. Professor Lamiell is a three-time Fulbright scholar to Germany and has been engaged with the writings of William Stern for over 30 years. As a visiting professor at the University of Hamburg in 2004 he delivered a series of public lectures on Sterns life and works. He has published numerous articles and books on William Stern including Uncovering Critical Personalism: Readings from William Sterns Contributions to Scientific Psychology (2021). He is also the former president of APA Divisions 24 (Society of Theoretical and Philosophical Psychology) and 26 (Society for the History of Psychology).