Special used in factors of development of the child’s early and preschool age psychological study of infants. One of the many experiments used for children.
Developmental psychology is the scientific study of how and why human beings change over the course of their life. Developmental psychology examines the influences of nature and nurture on the process of human development, and processes of change in context and across time. Watson and Jean-Jacques Rousseau are typically cited as providing the foundations for modern developmental psychology. There are many theorists that have made a profound contribution to this area of psychology. For example, Erik Erikson developed a model of eight stages of psychological development. Sigmund Freud believed that we all had a conscious, preconscious, and unconscious level.
In the conscious, we are aware of our mental process. The preconscious involves information that, though not currently in our thoughts, can be brought into consciousness. Lastly, the unconscious includes mental processes we are unaware of. He believed there is tension between the conscious and unconscious because the conscious tries to hold back what the unconscious tries to express.
To explain this he developed three personality structures: the id, ego, and superego. The id, the most primitive of the three, functions according to the pleasure principle: seek pleasure and avoid pain. Based on this, he proposed five universal stages of development, that each is characterized by the erogenous zone that is the source of the child’s psychosexual energy. The first is the oral stage, which occurs from birth to 12 months of age.