Development incorporates change over time. We all change as we mature. Some of those changes are due to experience and others to our physiology. Developmental psychology is concerned with the patterns and processes of change throughout our lifetimes. A significant question in developmental psychology is the relation between innateness and environmental influence in regard to any particular aspect of development - put in more easy terms nature vs nurture.
Developmental psychology is interested in discovering the psychological processes of development. This is also the study of progressive psychological changes that occur in human beings as they age. Originally concerned with infants and children, and later other periods of great change such as adolescence and early life aging, it now encompasses the entire life span of an individual. This ever growing field examines change across a broad range of topics including: motor skills and other psycho-physiological processes, problem solving abilities, conceptual understanding, acquisition of language, moral understanding, and identify formation.
Although developmental psychologists begin their work by charting the changes they see in the developing human, their ultimate goal is to explain how those changes came about. This is challenging because humans are dynamic, complex beings who are shaped by different people and events. It is often difficult to draw conclusions about exactly which influences and experiences are most important for particular aspects of cognitive development. Thus, psychologists examine a variety of influences including changes in the brain, the influence of parents, the effect of a child's interaction with siblings and peers, and the role of culture. Typically, in order to accurately characterize aspects of development, psychologists must consider interactions between physiological changes in the brain and the child's or person's social environment. For example,