<prompt> What is the most common reason that psychotherapy for personality disorders is so difficult to carry out successfully?The traits are often ego-dystonicThe patients are usually too sick to use psychotherapyThese disorders respond better to medication than to psychotherapyThe patients often see the source of their problems in others, not themselves.  <response>: Personality disorders are ego syntonic so the patients are usually unaware of their maladaptive traits and would in fact deny having problems and blame others. 