Willard W Hartup Editor & Author

Willard W. Hartup is Professor Emeritus in the Institute of Child Development at the University of Minnesota, where he taught for many years. He has also been the Institute's Director and President of the International Society for the Study of Behavioural Development and the Society for Research in Child Development.
Rainer K. Silbereisen is Professor and Chair of Developmental Psychology at the University of Jena, and Adjunct Professor of Human Development and Family Studies at the Pennsylvania State University. He is President of the German Psychological Association and the International Society for the Study of Behavioural Develoment as well as a member of the Academia Europaea and a Fellow of the American Psychological Association.