Commentary on "The Challenge of Transforming the Diagnostic System of Personality Disorders"

Associations between MMPI-3 scale scores and the DSM-5 personality disorders

OBJECTIVE

The current study examined associations between Minnesota Multiphasic Personality Inventory-3 (MMPI-3) scales and self-reported DSM-5 Section II personality disorder (PD) symptoms. A priori hypotheses were generated for which MMPI-3 scales would be most highly associated with each PD.

METHODS

We used a large sample (n = 489) of university students, who completed the MMPI-3 and two established self-report measures of personality disorders.

RESULTS

The results were generally consistent with theoretical expectations and previous research utilizing the MMPI-2-RF. Specifically, most hypothesized MMPI-3 scales exhibited meaningful associations with relevant PD variables, although there were some notable exceptions. The regression models revealed significant predictors for each PD which were generally consistent with expectations and previous research.

CONCLUSIONS

Overall, the MMPI-3 appears well situated to cover a range of DSM-5 Section II PD-related psychopathology, and three of the new MMPI-3 scales appear to have added utility for assessing personality pathology.

The borderline pattern descriptor in the International Classification of Diseases, 11th Revision: A redundant addition to classification

OBJECTIVE

The International Classification of Diseases, 11th Revision classification of personality disorder removes all categories of disorder in favour of a single diagnostic spectrum extending from no personality dysfunction to severe personality disorder. Following concerns from some clinicians and Personality Disorder Societies, it was subsequently agreed to include a borderline pattern descriptor as a qualifier of the main diagnosis. We explore the value of this additional descriptor by examining personality data in patients with major depression.

METHOD

We examined personality data obtained using the Structured Clinical Interview for Personality Disorder-II in 606 patients enrolled in five randomised controlled trials of depression. The Structured Clinical Interview for Personality Disorder-II uses the Diagnostic and Statistical Manual of Mental Disorders categorical system, which includes borderline personality disorder. The International Classification of Diseases, 11th Revision classification has five domain traits. Each of the Diagnostic and Statistical Manual of Mental Disorders personality disorder symptoms or behaviours from Structured Clinical Interview for Personality Disorder-II was reordered into the five domains independently by two assessors. The relationship between the two systems was examined by tabular and correlational analysis.

RESULTS

The findings showed that the symptoms of borderline personality disorder were associated with greater severity of personality disturbance in the International Classification of Diseases, 11th Revision classification (p < 0.0001) and were associated primarily with the Negative Affective, Dissocial and Disinhibited domains. There was only a weak association with the other two domains, Anankastia and Detachment.

CONCLUSION

The addition of a borderline pattern descriptor is likely to add little to the International Classification of Diseases, 11th Revision classification of personality disorder. Its features are well represented within the severity/domain structure, which allows for more fine-grained description of the personality features that constitute the borderline concept.

Moving forward: closing the gap between research and practice for young people with BPD

The study of personality disorders has come a long way, and this is characterized by the optimism prevalent within the community dedicated to its study. Outside this community - delays in intervention, ostracism, and ignorance remain common place. With a significant burden of disease and high costs at individual, social, and societal levels there is an urgent need to translate research into practice. Proposed solutions include educating the workforce to improve attitudes and developing more sustainable treatment alternatives. This paper brings forward a user perspective on the need to close the gap between what we know from research and what is done in policy and clinical practice.

A Bifactor Model of Personality Organization

The aim of this study was to explore the viability of a bifactor model for the Inventory of Personality Organization (IPO), which is a self-report measure of personality functioning based on Kernberg's model of personality organization. A heterogeneous, predominantly clinical sample (N = 616) completed the German 83-item version of the IPO. Confirmatory and Exploratory Factor Analyses were applied to explore the factor structure of the IPO. We were able to establish a bifactor model with a general factor of personality functioning and three specific factors (Aggression, Reality Testing, Moral Values), which represent additional dimensions of personality organization. Virtually all items showed substantial positive loadings on the general factor, explaining roughly 66% of the common variance. Furthermore, we found support for convergent and discriminant validity of general and specific factors with regard to interview-based assessments of personality disorders and personality organization. The results lend support to a bifactor approach to Kernberg's model of personality organization. We also present a 30-item brief form of the IPO that efficiently implements the bifactor approach and may be further validated in future studies.

A Brief but Comprehensive Review of Research on the Alternative DSM-5 Model for Personality Disorders

PURPOSE OF REVIEW

Both the Alternative DSM-5 Model for Personality Disorders (AMPD) and the chapter on personality disorders (PD) in the recent version of ICD-11 embody a shift from a categorical to a dimensional paradigm for the classification of PD. We describe these new models, summarize available measures, and provide a comprehensive review of research on the AMPD.

RECENT FINDINGS

A total of 237 publications on severity (criterion A) and maladaptive traits (criterion B) of the AMPD indicate (a) acceptable interrater reliability, (b) largely consistent latent structures, (c) substantial convergence with a range of theoretically and clinically relevant external measures, and (d) some evidence for incremental validity when controlling for categorical PD diagnoses. However, measures of criterion A and B are highly correlated, which poses conceptual challenges. The AMPD has stimulated extensive research with promising findings. We highlight open questions and provide recommendations for future research.