LEO B. HENDRY is Emeritus Professor, University of Aberdeen, Scotland and Fellow of the British Psychological Society. He has been a Visiting Professor to several universities in both Europe and North America and has been a keynote speaker at conferences world-wide. Professor Hendry has recently been presented with a Lifetime Award for his contributions to European research on adolescence by the European Association for Research on Adolescence. He has written well over 150 research journal articles, 30 book chapters and 20 books. His research and writing focuses on various aspects of lifespan development from a systemic perspective. MARION KLOEP is recently retired Professor of Psychology, University of Glamorgan, Wales. Her teaching and research concentrates on lifespan development, with a special emphasis on transitions and turning-points. Her work has been published in the UK, Germany, Sweden, Norway, Denmark, Italy and Mexico.