Parenting >> Forum >> Child Psychology and Behaviour >> Child psychology is a board area, covering how people change as they grow up from birth through to adolescence and trying to explain how these important changes occur -are 3 to 7 years old and teenagers different just because of their experiences of the world, or what role is played by biological changes within the individual? Because child psychology is so vast and tries to answer so many questions, researches and practitioners often separate development into specific areas. Broadly these tend to map onto children's physical, cognitive and social development. Children typically reach development milestones. These milestones reflect abilities , such as walking and talking , that are achieved by most children at similar ages. Among other things, we are interested in trying to explain how children reach these milestones and how individual , social and cultural factors may influence how we develop. Newborns select what to pay attention to by where they look and how they orient themselves usually towards familiar sounds, things that are new or surprising to them, or to the smell of milk. Once the child begin to speak they often drive conservations - expecting responses from adults. When children begin to engage in imaginary play from around 2 years of age they often take on new personas and roles that help them make sense of different aspects of their world .By the time children reach school age they begun to make many decisions about their environment , such as who to be friends with and what interests to pursue.