1. Paula Lyytinen, PhD, is an acting professor of developmental psychology at the University of Jyväskylä, Finland. Her research interests include child language and cognitive development.
2. Helena Rasku-Puttonen, PhD, is a senior lecturer in the Department of Teacher Education at the University of Jyväskylä. Her main area of research interest is parent-child interaction.
3. Anna-Maija Poikkeus, MA, and Marja-Leena Laakso, MA, are doctoral students at the University of Jyväskylä; the former also was a doctoral student at the University of Minnesota.
4. Timo Ahonen, PhD, is a senior researcher at the Niilo Mäki Institute of the University of Jyväskylä, which specializes in the neuropsychological assessment of learning disabilities. Presently, this group is actively involved in a longitudinal research project concerning early language development and genetic risk for dyslexia. Address: Paula Lyytinen, Department of Psychology, University of Jyväskylä, PO Box 35, SF-40351 Jyväskylä, Finland.