The Editors : Janusz Trempa ? a received his M.A. (1977), Ph.D. (1983) and Habilitation (1993) in psychology from Adam Mickiewicz University in Pozna ? (Poland). In 2001 the President of the Republic of Poland conferred him a title of Professor of Humanistic Sciences. He has taught, lectured, and conducted seminars on general and developmental psychology at many universities in Poland, including Bydgoszcz University of Casimirus the Great where he is deputy director of the Institute of Psychology and chairman of the Department of Human Development.
Lars-Erik Malmberg received his MEd (1989) and EdD (1998) from Åbo Akademi University (Vasa, Finland). He has been lecturer and researcher at the Department of Teacher Education 1990-2001, focusing on quantitative methods, cross-cultural research and developmental psychology. He was a visiting fellow at Yale University, USA, 1999-2000.