Comer’s models are interesting and they are successful in explaining the underlying causes behind the disorders that are presented below. According to the biopsychosocial model, the cause of dysfunction is attributed to biological malfunction which can be solved by only biological intervention the goal of the therapy being biological repair. As I was watching Stephanie’e story, I understood that in this case the motherly instinct has gone into an overdrive. She is constantly worried that some harm will happen to her son. Comer’s behavioural model and psychodynamic model might help to explain this problem of OCD.