Child psychology is the study of the mental, emotional, and social development of children from infancy through adolescence. It focuses on how children think, feel, behave, and interact with their environment, including family, peers, and society. The field examines key developmental stages, such as cognitive development (how children learn, think, and understand), emotional development (how they regulate emotions and develop self-awareness), and social development (how they form relationships, communicate, and interact with others). Child psychologists study topics like attachment theory, which explores the bond between children and caregivers, and how early experiences shape later behavior. Other areas of focus include developmental disorders like autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), anxiety, depression, and trauma-related conditions