Hi Erika,

Transactional model as in a two-way interaction. For example, from the individual to society and to and fro, and to and fro. Society rejects the individual, then the individual turns to crime an in turn affects the social environment through criminal activities, then the system punishes the person, who becomes more resentful towards it and so on.

This is a model that is always brought up in contexts and studies of developmental psychology. I just thought it resembles a lot systemic principles :)