Establishing Levels of Personality Functioning Using the Structured Interview of Personality Organization (STIPO-R):...

Area of Science:

• Psychiatry
• Clinical Psychology
• Psychopathology

Background:

• New diagnostic systems (ICD-11, DSM-5) emphasize self/interpersonal functioning and dimensional severity for personality disorders.
• This aligns with psychodynamic models, like Kernberg's object relations theory.
• The Structured Interview of Personality Organization (STIPO-R) shows clinical utility, but clear cut-points for functioning levels are needed.

Purpose of the Study:

• To empirically identify distinct levels of personality functioning.
• To validate the dimensional continuum of personality pathology using the STIPO-R.
• To establish clear cut-points for personality functioning levels.

Main Methods:

• Mixture modeling analysis was applied to data from 764 adult participants (clinical and non-clinical samples).
• The Structured Interview of Personality Organization (STIPO-R) was used to assess personality organization.
• Statistical analysis identified groups representing different levels of personality functioning.

Main Results:

• Five distinct groups emerged: healthy functioning, maladaptive rigidity, and mild, moderate, and severe personality pathology.
• All five STIPO-R indicators reliably predicted personality pathology.
• Aggression and Moral Values demonstrated the strongest ability to differentiate between mild, moderate, and severe personality disorder groups.

Conclusions:

• The findings support a dimensional model of personality pathology with identifiable levels of functioning.
• The STIPO-R is a valuable tool for assessing these levels and differentiating personality disorder severity.
• These results have implications for refining personality disorder diagnosis and treatment.