First published in 1987, Biological-Psychosocial Interactions in Early Adolescence explores themutually - influential relations between biological and psychosocial variables as the basis for development in the early portions of the adolescent period and, in fact, across the entire life span. The volume introduces key conceptual and methodological issues that are raised by the study of biological-psychosocial interrelations. It provides key foundations for the research conducted in major laboratories in USA back in 1980s. It also provides the results from these laboratories and their progress at that time. This book will be an essential read for scholars and researchers of psychology, behavioural science, and sociology.