Borderline and schizophrenic patients. A comparative study of defensive structure

Area of Science:

• Psychiatry
• Psychology
• Psychoanalytic Theory

Background:

• The diagnostic relationship between borderline personality disorder and schizophrenia remains historically debated.
• Distinguishing these conditions is crucial for effective treatment and understanding core psychopathology.

Purpose of the Study:

• To investigate the differential diagnostic features between borderline personality disorder and schizophrenia.
• To assess the utility of a Rorschach scoring manual for identifying primitive defenses in these patient groups.

Main Methods:

• Applied a Rorschach scoring manual assessing primitive defenses to hospitalized adolescent and young adult patients.
• Samples were independently selected based on DSM-III criteria for borderline personality disorder and Research Diagnostic Criteria for schizophrenia.
• Analyzed defensive functioning differences between the two diagnostic groups.

Main Results:

• Found significant differences in defensive functioning between borderline and schizophrenic patients.
• Borderline patients demonstrated significantly higher use of splitting, primitive devaluation, idealization, denial, and projective identification.
• The Rorschach Scoring System showed high inter-rater reliability in discriminating between the groups.

Conclusions:

• Primitive defenses, particularly splitting and projective identification, reliably differentiate borderline personality disorder from schizophrenia.
• The Rorschach Scoring System is a valid and reliable instrument for differential diagnosis and research in these conditions.
• Findings support borderline personality disorder as a distinct diagnostic entity with unique defensive structures.