A Young Mind in a Growing Brain summarizes some initial conclusions that follow simultaneous examination of the psychological milestones of human development during its first decade and what has been learned about brain growth. This volume proposes that development is the process of experience working on a brain that is undergoing significant biological maturation. Experience counts, but only when the brain has developed to the point of being able to process, encode, and interact with these new environmental experiences. This book's aim is to acquaint developmental biologists and neuroscientists with what has been learned about human psychological development and to acquaint developmental psychologists with the biological evidence. The hope is that each group will gain a richer appreciation of both knowledge corpora. The authors hope to appeal to neuroscientists, psychologists, psychiatrists, pediatricians, and their students. The idea for this book was born in 1993 when the authors--a leading developmental psychologist and a pediatrician--met for the first time and recognized the complementarity of their backgrounds and the utility of a collaboration. The reception of their first two papers motivated this attempt to synthesize the available information over a longer developmental era. Learning a great deal over the past decade, the authors hope that their enthusiasm provokes an equally intense curiosity in readers.