Handbook of the Psychology of Aging, Ninth Edition tackles both the biological and environmental influences on behavior and the reciprocal interface between changes in the brain and behavior that span the adult lifespan. This information is very important to many features of daily life, from workplace to family, and in public policy matters. It is complex and new questions are continually raised about how behavior changes with age. Providing perspectives on the behavioral science of aging for diverse disciplines, the handbook explains how the role of behavior is organized and how it changes over the course of life. Along with parallel advances in research methodology, it explicates in great detail, patterns and sub-patterns of behavior over the lifespan, and how it affects biological, health and social interactions.