system

Theory) is the theory of developmental psychology, which was put forward by Urie Bronfenbrenner, a Russian-American psychologist.

Bronfenbrenner) proposed an individual development model. It is emphasized that developing individuals are nested in a series of interactive environmental systems, and the system interacts with individuals, which affects individual development.

Generally speaking, he thinks that the development of human psychology from small to large is a growing process in which natural environment, social environment, family environment and individuals are nested and matched. There is an organic system between the natural environment and the humanistic environment, which determines the development direction together with the individual's own subjective initiative. Urie Bronfenbrenner divided the ecosystem model into four layers: micro-system, internal system, external system and macro-system. He vividly compared it to the general nesting relationship of "Russian dolls". This theory is the product of the combination of psychology, ecology and system theory, and then it also affects other branches of health psychology.