OBJECTIVE: Borderline personality disorder (BPD) is known to share characteristics with a variety of personality disorders (PDs) and exhibits diverse patterns of defense mechanisms. To enhance our understanding of BPD, it\'s crucial to shift our focus from traditional categorical diagnostics to the dimensional traits shared with other PDs, as the borderline personality organization (BPO) model suggests. This approach illuminates the nuanced spectrum of BPD characteristics, offering deeper insights into its complexity. While studies have investigated the comorbidity of BPD with other PDs, research exploring the relationship between various personality factors and defense mechanisms within BPD itself has been scarce. The present study was undertaken to investigate the complex interrelationships between various personality factors and defense styles in individuals diagnosed with BPD.
METHODS: Using a network analysis approach, data from 227 patients diagnosed with BPD were examined using the Defense Style Questionnaire and Personality Disorder Questionnaire-4+ for assessment.
RESULTS: Intricate connections were observed between personality factors and defense styles. Significant associations were identified between various personality factors and defense styles, with immature defense styles, such as maladaptive and image-distorting being particularly prominent in BPD in the centrality analysis. The maladaptive defense style had the highest expected influence centrality. Furthermore, the schizotypal, dependent, and narcissistic personality factors demonstrated relatively high centrality within the network.
CONCLUSIONS: Network analysis can effectively delineate the complexity of various PDs and defense styles. These findings are expected to facilitate a deeper understanding of why BPD exhibits various levels of organization and presents with heterogeneous characteristics, consistent with the perspectives proposed by the BPO.

BACKGROUND: The Inventory of Personality Organization (IPO) is a self-assessment instrument designed to measure the level of personality organization. In the present study, we developed and validated a French version (IPO-fr) of this instrument in a population of young adults. Its validity was established on the basis of two studies examining (1) its internal structure, and (2) its convergent validity with the Personality Diagnostic Questionnaire-4+, the Positive and Negative Affect Schedule (PANAS), the Hospital Anxiety and Depression Scale (HADS), and the Aggression Questionnaire (AQ).
METHODS: In the first study, we assessed the reliability of the internal structure of the French form of the IPO (IPO-fr) in a nonclinical population. Our sample comprised 602 first- and second-year psychology students, with a mean age of 19.40 years (SD = 1.95). The second study assessed the convergent validity of the questionnaire in nonclinical samples, with regard to the three clusters (A, B, and C) of personality disorders, positive and negative affect, and aggression and depressive symptoms. The sample for this second study consisted of 305 first-, second- and third-year psychology students, with a mean age of 19.83 years (SD = 2.12).
RESULTS: The French version of the IPO is shorter than the English: 40 items instead of 57. Its internal clarity and its discriminative capacity make it easier to interpret.
CONCLUSIONS: This study has established the relevance of the IPO-fr as a reliable and brief instrument for assessing individual personality. It could make a major contribution to the screening of personality pathology in the French population and to the assessment of treatment programs.

There is limited research on the role of childhood trauma in personality pathology according to Kernberg\'s psychodynamic model of internalized object relations. Because childhood trauma reflects the disruptions of these relations, it is expected to predict borderline personality organization, especially at the threshold of adulthood. Therefore, the main aim of this retrospective study was to examine the impact of childhood trauma on borderline personality organization in a community sample of emerging adults. Participants were 543 Greek individuals aged 18-29 (M = 21.45; 58.6 % females; 85.1 % university students). They completed the Greek versions of the Traumatic Antecedents Questionnaire (TAQ) and the Inventory of Personality Organization (IPO), which were tested for their factorial structure, reliability, and measurement invariance across gender, as few empirical data exist on the psychometric properties of these measures. Confirmatory factor analyses showed that the TAQ consisted of four factors, namely positive experiences, abuse, traumatic life events, and family chaos. The five-factor theoretical structure of the IPO, namely primitive defenses, identity diffusion, reality testing, aggression, and moral values, was confirmed. Low to moderate links between childhood trauma and borderline personality organization were found, with stronger links emerging for abuse and family chaos. Structural equation modeling showed that the various forms of childhood trauma across the age periods studied (i.e., 0-6, 7-12, 13-18) significantly and differentially predicted the dimensions of borderline personality organization. The finding that stronger links emerged when trauma occurred in older ages may be attributed to the retrospective method of the study. Gender differences were also found; for example, personality pathology was more likely in men when abuse and traumatic life events occurred in younger ages and abuse was a more important risk factor for personality pathology in women. This study highlights the impact of childhood adversity on personality pathology in emerging adulthood, provides empirical support for Kernberg\'s psychodynamic model, and has useful implications for trauma-informed early screening, prevention, and intervention regarding personality pathology in young people. Limitations of this study and suggestions for future research are outlined.

Several evidence-based psychotherapies for personality disorders have been developed in recent decades, including transference-focused psychotherapy (TFP), a contemporary model of psychodynamic psychotherapy developed by Otto Kernberg. Kernberg established Group TFP (TFP-G) as an alternative or adjunct treatment to individual TFP. Although not yet manualized, TFP-G is used in publicly and privately funded mental health services, including outpatient clinics, subacute hospitals, therapeutic inpatient units, partial hospitalization services, and rehabilitation services serving people with borderline personality. Kernberg\'s model of TFP-G psychotherapy, its application in clinical settings, and what differentiates it from other group psychotherapy models is described as well as illustrated with some examples useful to practitioners.

The aim of the current study was to investigate whether a specific social perception of the pandemic-believing or not in COVID-19-predicts borderline personality organizations and whether this relationship is mediated by more primitive maladaptive mechanisms-splitting, denial, and dissociation. The online study included 720 organization aged 25-45. Participants were diverse in terms of place of residence, being in a relationship, and education level. Approximately 30% of the general population reported not believing in the COVID-19 pandemic. Non-believers scored slightly higher on borderline symptoms and used more maladaptive defense mechanisms than believers. Individuals who deny COVID-19 are more likely to show characteristics of borderline personality organization. Splitting is an important mechanism in this relationship.

Borderline personality organization (BPO) is a key personality component of some but not all partner-violent men. The study described in this paper examines the psychometric properties of the borderline personality organization scale (BPO Scale; Oldham et al., 1985) in a Spanish sample of 643 men undergoing court-mandated psychological treatment after conviction for episodes of intimate-partner violence. Three confirmatory factor analyses were carried out first, and the three-factor structure of the BPO scale was then tested. Results for concurrent validity show positive and significant correlations between the subscales and the overall BPO scale, and with other instruments that measure borderline and antisocial personality disorders (ASPDs), and impulsivity. The BPO scale also presents evidence of known-groups validity, since BPO scores decrease with age, and of discriminant validity, as the scale discriminates between participants who do and do not exceed the cutoff point on a borderline personality scale. The BPO Scale is a suitable instrument for evaluating BPO in partner-violent men.

The Borderline personality disorder (BPD) diagnosis has its origins in the concept of borderline personality organization (BPO). BPO is rooted in psychoanalytic object relations theory (ORT) which conceptualizes BPD and BPO to exhibit a propensity to view significant others as either idealized or persecutory (splitting) and a trait-like paranoid view of interpersonal relations. From the ORT model, those with BPD think that they will ultimately be betrayed, abandoned, or neglected by significant others, despite periodic idealizations. This article synthesizes the extant literature splitting and trust impairments in BPD, identifies avenues for further investigation, and discusses the relative promise of different methods to evaluate these clinical processes.