The speedy physical and psychological changes that children undergo from birth through adolescence often leave parents and caregivers wondering how best to engage and help them.
Developmental psychology seeks to answer two big questions about heredity and environment: Nature refers to the process of biological maturation inheritance and maturation.
One of the reasons why the development of human beings is so similar is because our common specifies heredity (DNA) guides all of us through many of the same developmental changes at about the same points in our lives.
Stability implies personality traits present during present during infancy endure throughout the lifespan.
In contrast, change theorists argue that personalities are modified by interactions with family, experiences at school, and acculturation. For example, Rutter (1981) discovered than somber babies living in understaffed orphanages often become cheerful and affectionate when placed in socially stimulating adoptive homes.