Developmental psychology is the scientific study of how people grow and change throughout their lives. It examines various aspects of development, including physical, cognitive, emotional, and social changes from infancy to old age. Researchers in this field explore how genetics, environment, and culture influence development. This branch of psychology often focuses on key stages, such as childhood, adolescence, and adulthood. By understanding these stages, psychologists can identify typical patterns of development and address issues that may arise, such as learning disabilities or behavioral problems. This knowledge helps in creating effective interventions and support systems for individuals at different life stages.