抄録
Social networks are defined as the entity of various relations among people or groups. Social network analysis employs the view of relational structuralism. In this view, the behavior, thoughts, recognition, or mental health of people who are surrounded by social networks receives effects from the configurations of the networks or their positions in the networks. Social network analysis takes advantage of mathematical models to represent the theories of social positions or roles. Social network analysis and other theories are compared both theoretically and methodologically to clarify the bases of social network analysis.