is a psychological theory proposed by Murray Bowen, which describes the systemic processes of the family that affect the emotional behavior of its individual members. The emotional reaction of an individual family member depends on the strength of the excitation of the entire system: if the system is strongly excited, then the reaction is automated and emotional; If the excitation of the system is weak, then the reaction is more meaningful and less automatic. The theory of family systems consists of eight propositions, which are theoretical hypotheses. Bowen identifies two parameters in his theory: the level of anxiety and the differentiation of the “I”.