The Family Dynamics of Narcissistic Personality Disorder and of Psychosomatic Illnesses | Psychology Today
Personality disorders  are not diseases.  They are merely combinations of dysfunctional  character traits that happen to occur together at a frequency much  greater than would be predicted by chance.  Within each disorder, there  are quite a few different combinations of the traits listed in the  diagnostic criteria that qualify someone for the diagnosis.
Personality  disorder researchers have found that if a given patient meets the  threshold for one personality disorder, the chances are excellent that  they will also meet the threshold for an average of just under two other personality disorders.  Any other two personality disorders.
Psychologists also talk about something called the primary attribution error.  Whenever we see others behaving in a certain way, we are all apt to attribute their behavior to inborn personality characteristics rather than seeing it as reactive to a particular environment.   This is considered by psychologists to be an error because the  situation and social context people find themselves is often at least  and usually far more important than their inborn tendencies in  determining what they actually do.
Not that our inborn tendencies  are irrelevant.  It is just that our species is very good at adapting  to its physical and particularly to its social environment.  The  tendency to be adaptive is what is programmed into our DNA.
Before  I proceed with describing two more roles, I would like to comment on a  question a reader posed after my last post.  She wanted to know what the  "fix" is if one finds oneself acting out one of these roles.  That's a  great question but, unfortunately, a very complicated one.  In general,  the fix involves employing certain techniques for altering both your own  behavior and the reactions that your family has to it. If it is done  poorly, however, results can be disastrous and make matters much worse. I  generally do not recommend trying the techniques on your own without  the guidance of a therapist versed in them.
