The structure and development of borderline personality disorder: A proposed model

Background The theory of cognitive analytic therapy is extended to offer an understanding of borderline personality disorder (BPD). Method A structural model (the multiple self states model) and a classification of different levels of developmental damage are proposed. Results The model offers an explanation of the phenomenology of BPD. Conclusions The multiple self states model provides insights that will be useful for clinicians involved in the psychotherapy and management of BPD patients.