Duration : 3 Months This Course to Gain knowledge and understanding of how children think, cognitive and language development and children s ..d psychology is concerned with the development of a person over the course of their childhood. This involves the development of a child s mental processes ie. cognitive development as well as emotional and social behavior. It is important to state that development does not end at adulthood. Adults continue to experience changes in their mental, emotional and social behaviors. Some characteristics are however more easily developed and changed during childhood.