Intelligence and Treatment Outcome of Mentalization-Based Treatment in Borderline Personality Disorder.

BACKGROUND: Mentalization-based treatment (MBT) is an evidence based treatment for patients diagnosed with borderline personality disorder (BPD). Although MBT is effective, on average, for individuals with BPD, there are large individual differences in treatment outcomes. Research on predictors of the treatment effect of MBT, such as intelligence, is needed to determine which treatment is most effective for which 'category' of BPD patients, providing more knowledge about optimal indications. OBJECTIVE: The study aimed to investigate whether intelligence is associated with MBT outcomes in patients with BPD and exploratively studying the difference between two variants of MBT. METHODS AND PROCEDURES: A pre-post intervention design was used to examine the effects of MBT on BPD severity. Personal and social recovery were measured as secondary outcome measures. The association between intelligence and the degree of recovery was examined. RESULTS: No significant correlation was found between intelligence level and treatment efficacy. In addition, a negative correlation between IQ and personal and social recovery was found, indicating that, as IQ increased, the level of recovery decreased. Secondary subanalyses showed the treatment effect of MBT was large and significant in reducing BPD symptoms (Cohen's d = 1.5) and that there was no significant difference between the 2-day MBT and 3-day MBT programmes in terms of a decrease in BPD severity. However, a significant medium positive correlational relationship was found between intelligence and a decrease in BPD severity level for the 3-day MBT, which was not found for the 2-day MBT programme. This indicates that in the 3-day MBT programme, the higher the IQ, the higher the decrease in BPD severity level. CONCLUSIONS AND IMPLICATIONS: This study is the first to examine the association between intelligence and the outcome of MBT in BPD patients. It shows that patients with a wide range of intelligence (72-124) can equally benefit from MBT and that effectiveness of MBT was not influenced negatively by lower intelligence. Secondary subanalyses showed that this was particularly evident when the intervention was delivered within the context of a 2-day MBT programme. Nevertheless, further randomized studies are required to ascertain the relationship between IQ and treatment effectiveness, as well as other predictors of MBT outcomes.

Breaking the cycle with trauma-focused mentalization-based treatment: theory and practice of a trauma-focused group intervention.

Trauma-Focused mentalization-based treatment (MBT-TF) is an adaptation of mentalization-based treatment (MBT) specifically developed for patients suffering from attachment or complex trauma, with the possibility of co-occurring borderline personality pathology. The creation of MBT-TF was driven by previous research and observations that interventions centered on mentalizing could be significantly improved by directly addressing the impact of trauma. MBT-TF aims to mitigate symptoms that arise post-trauma, such as hyperarousal, hypervigilance, intrusions, flashbacks, avoidance behaviors, dissociative experiences, negative perceptions of self and others, and ensuing relational difficulties. Implemented as a group intervention, MBT-TF typically spans 6-12 months. From a mentalizing perspective, trauma, particularly attachment trauma, leads to a failure in processing the effects of trauma through and with others. Stress and attachment behavioral systems are disrupted, which undermines the capacity for epistemic trust, and impairs mentalizing abilities. This paper offers a concise summary of the reasoning for MBT-TF's creation, its theoretical underpinnings, and its clinical strategy for addressing the adverse impacts of trauma. It further details the treatment phases, their main goals, and their interventions, supplemented by clinical case examples that underscore MBT-TF's distinctive attributes and frequent clinical hurdles.

Reflective functioning mediates the relationship between insecure adult attachment and the severity of prolonged grief symptoms.

Background: This study aimed to investigate the mediation role of reflective functioning (i.e., certainty and uncertainty about mental states) in the relationship between insecure attachment (i.e., attachment avoidance and attachment anxiety ) and the severity of prolonged grief symptoms. Methods: A cross-sectional study was conducted with 329 bereaved participants (51.7% females, mean age= 46.94 ± 14.62 years). Participants completed the Prolonged Grief Scale (PG-13), the Attachment Style Questionnaire (ASQ), and the Reflective Functioning Questionnaire (RFQ). Demographic and bereavement-related information were also collected. Results: Certainty about mental states fully mediated the relationship between both the attachment avoidance and attachement anxiety and severity of prolonged grief symptoms. Conclusions: The findings of this study indicate that reflective functioning impairment, specifically certainty about mental states of self and others, mediate the paths from insecure attachment to prolonged grief symptoms. This suggests that improving reflective functioning may contribute to the treatment bereaved individuals at risk of PGD.

Corrigendum: Minding mentalizing - convergent validity of the Mentalization Breakdown Interview.

[This corrects the article DOI: 10.3389/fpsyt.2024.1380532.].

Mentalization-based interventions in schools for enhancing socio-emotional competencies and positive behaviour: a systematic review.

Mentalization-based interventions (MBIs) have been increasingly applied in school settings to support the social-emotional development and mental health of children and adolescents. This systematic review aimed to synthesize the evidence on the effectiveness of MBIs implemented in educational contexts for students aged 6-18 years. A comprehensive search was conducted in PsychInfo, MEDLINE, EMBASE, Web of Science, and ERIC databases from inception to October 2023. The search strategy combined terms related to mentalization, school-based interventions, and the target age group. The review protocol was registered with PROSPERO (CRD42022302757). Inclusion criteria included peer-reviewed publications in English, studies published between 1980 and 2023, interventions based on mentalization principles, and a primary focus on children aged 6 to 18 years. Exclusion criteria involved non-mentalization based interventions and research outside the 6-18 age range. The risk of bias was assessed using the Quality Assessment Tools from the National Institutes of Health (NIH). Data were synthesized narratively due to the heterogeneity of study designs and outcomes. Of the 5,250 articles screened, 21 studies met the inclusion criteria, comprising over 7,500 participants. The reviewed interventions targeted various aspects of mentalizing, such as emotion-understanding, empathy, perspective-taking, and Theory of Mind. Significant improvements were found in social-cognitive abilities, emotion regulation, and mental health outcomes, including reductions in disruptive behaviours. Interventions that combined mentalizing training for both students and teachers showed promising results. However, the long-term sustainability of these benefits remains unclear. Limitations of the reviewed studies include the lack of control groups, small sample sizes, and variations in outcome measures. The findings highlight the potential of MBIs as a promising approach to fostering socio-emotional competence, positive behaviour, and well-being in school-aged children. Future research should aim to establish the active components and optimal delivery of these interventions through well-designed randomized controlled trials with larger, more diverse samples and extended follow-up periods. The integration of MBIs within educational systems holds promise for promoting resilience and positive mental health outcomes in young people. Embedding MBIs within school curriculums and evaluating cost-effectiveness are important next steps to guide widespread implementation.

Update on Antisocial Personality Disorder.

PURPOSE OF REVIEW: Antisocial personality disorder (ASPD) is a characterized by lifelong or recurrent behavioral problems that begin in childhood or early adolescence. This communication provides an overview on ASPD including findings from recent reviews and new research. RECENT FINDINGS: With regard to DSM-5's Section III Alternative Model of Personality Disorder criteria for ASPD, advocates point to the broader symptom coverage and harmonization with ICD-11; yet critics point to the lack of evidence for improved outcomes. A new report shows that antisocial individuals age faster than non-antisocial peers. ASPD has high heritability and newer molecular studies have found intriguing linkages to genes associated with crucial brain regions. A mentalization-based therapy model has been developed and early work shows promise. ASPD is common, widespread, and disruptive to individuals, families, and society. Chronic and lifelong, ASPD typically lessens in severity with advancing age. Assessment rests on the individual's history because there are no diagnostic tests. ASPD likely results from an interplay of genetic and environmental factors. Brain imaging studies have linked cortical dysfunction to antisocial behavior in crucial brain regions. Medication is sometimes targeted at the individual's aggression and irritability, but a more rational approach is to target co-occurring disorders. Cognitive-behavioral therapy and mentalization-based therapy models have been developed and are being studied.

Borderline personality trait is associated with neural differentiation of self-other processing: A functional near-infrared spectroscopy study.

BACKGROUND: Individuals with borderline personality traits are known to have disturbed representations of self and others. Specifically, an unstable self-identity and difficulties distinguishing between self and others can impair their mentalizing abilities in interpersonal situations. However, it is unclear whether these traits are linked to differences in neural representation of self and others. METHODS: In this study involving 156 young adults, changes in neural function during self-other processing were measured using a Functional Near-Infrared Spectroscopy (fNIRS) task and a self-report survey. During the fNIRS task, participants were asked about their own traits, others' traits, how they believed others perceived them, and the basic meaning of words. The study aimed to determine whether the degree of neural differentiation between the task conditions was related to borderline personality traits. RESULT: The study found that traits indicative of identity instability could be predicted by similarities in task-dependent connectivity. Specifically, the neural patterns when individuals estimated how others perceived them were more similar to the patterns when they judged their own traits. CONCLUSIONS: These findings suggest that borderline personality traits related to identity issues may reflect difficulties in distinguishing between neural patterns when processing self and other information.

A Meta-Analysis of Interpersonal and Psychodynamic Psychotherapies for Posttraumatic Stress Disorder.

OBJECTIVE: Established trauma-focused cognitive-behavioral therapies for posttraumatic stress disorder (PTSD) have remission rates of approximately 30%-40%. Alternatively, interpersonal psychotherapy (IPT) and psychodynamic psychotherapy (PDT) focus on disrupted attachment, mentalization, and social connection in PTSD and may help some patients. The authors conducted a meta-analysis on these interpersonal and affect-oriented approaches to treating PTSD. METHODS: Building on a prior meta-analysis, the authors searched for randomized controlled trials (RCTs) comparing IPT or PDT with other established PTSD treatments or control conditions for adults diagnosed as having PTSD. Random-effects meta-analyses were conducted to assess outcome effect sizes and dropout rates. RCTs were rated via the Randomized Controlled Trial Psychotherapy Quality Rating Scale. RESULTS: Ten RCTs (eight of IPT) comparing IPT or PDT with control (k=7) or active treatment (k=4) conditions were identified, nine of which were of adequate quality. IPT (k=5) and PDT (k=2), when analyzed together, were superior to control conditions overall (g=-1.14, p=0.011 [as was IPT alone: g=-0.88, p=0.034]) and to waitlist (g=-1.49) and treatment-as-usual (g=-0.70) groups. Effect sizes, however, may have been inflated by outliers or publication bias. IPT (k=3) and PDT (k=1), when analyzed together, were equally efficacious compared with other active PTSD treatments (primarily exposure-based psychotherapies), as was IPT alone, and had lower dropout rates (relative risk=0.63, p=0.049 for IPT and PDT analyzed together; relative risk=0.61, p=0.098 for IPT alone). CONCLUSIONS: Affect-focused therapies hold promise in the treatment of PTSD. IPT has demonstrated efficacy in multiple trials, whereas the evidence base for PDT is sparse.

A Randomized Controlled Trial Comparing Mentalization-Based Therapy With the Unified Protocol in the Treatment of Psychopathy and Comorbid Borderline + Antisocial Personality Disorders.

BACKGROUND: Those with cooccurring antisocial personality disorder (ASPD) and borderline personality disorder (BPD) are reported to be highly psychopathic and to represent a severe challenge to treatment efforts. In a sample of such individuals, the effects of two treatments, mentalization-based therapy (MBT) and the unified protocol (UP), were investigated on three outcomes: (i) the psychopathy trait domains of meanness, boldness and disinhibition proposed by the triarchic psychopathy model (TPM); (ii) antisocial and borderline symptom severity; and (iii) the severity of their common features including impulsivity, anger expression and self-harm. METHODS: Of 163 individuals with BPD + ASPD screened for eligibility, 55 were randomized to MBT treatment and 53 to UP treatment. Outcomes of treatment were assessed at 6-month intervals to 36 months. RESULTS: Short-term reductions were seen following both treatments in traits of psychopathy, antisocial and borderline personality symptom severity, anger dysregulation, impulsivity and self-harm, but both treatment groups showed almost complete relapse of symptoms at the 36-month follow-up. UP had more durable effects than MBT. CONCLUSIONS: Despite being a considerably shorter treatment, UP was at least as effective as MBT and in some respects superior. Remission of symptoms was not achieved by either treatment in the long term. Psychopathy and borderline/antisocial comorbidity with which it is associated are to some extent remediable through psychotherapy, but only in the short term. CLINICAL IMPLICATIONS: Patients with high levels of impulsivity and disinhibition are likely to relapse following psychotherapy and should be closely monitored after treatment.

Mental Flexibility and Epistemic Trust Through Implicit Social Learning - A Meta-Model of Change Processes in Psychotherapy With Personality Disorders.

This position paper follows the call for transtheoretical meta-models of general clinical change by concentrating on severe mental illness such as Personality Disorders (PDs). We have identified a core process of change related to mental flexibility through implicit learning and propose recommendations for stance and technique that are informed by research on Mentalization-Based-Treatment (MBT) and the learning components as represented in the Mediational Intervention for Sensitizing Caregivers (MISC). While the idea of corrective emotional experience as a general change mechanism involves discriminating between an old and new relationship to update relationship knowledge, the capacity to understand and process corrective emotional experiences may be limited and even iatrogenic in patients with PDs. By integrating MBT and MISC, a meta-model of change is created that allows training in and observation of the granular-level, behaviorally anchored, actions taken by the therapist to open up social learning. Here, social learning is conceptualized as epistemic trust, increasing the client's reflective functioning during sessions to ultimately enhance cognitive flexibility outside the therapy room. This opens the possibility to implement and observe micro changes in what should be termed now implicit cognitive and emotional corrective experiences. Thus, we propose to shift towards implicit learning within professional relationships; that is, internalizing a new way of thinking about any life-event that requires adaption thereby creating adaptive capacities via mental flexibility as the general change mechanism of Personality Disorder (PD) treatment.

Alternation of psychological resilience may moderate mentalization toward mental health conditions from macro- and microstructure aspects.

OBJECTIVE: We aim to investigate the interplay between mentalization, brain microstructure, and psychological resilience as potential protective factors against mental illness. METHOD: Four hundred and twenty-six participants (mean age 40.12±16.95; 202 males, 224 females), without psychiatric or neurological history, completed assessments: Dissociative Process Scale (DPS), Peace of Mind (PoM), Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), Resilience Scale for Adults (RSA), and Magnetic Resonance Imaging (MRI) structures with selected regions of interest, and Diffusion Tensor Imaging (DTI) maps from various tracts in the right hemisphere and connection to the frontal areas, including anterior thalamic radiation (ATR), Cingulum (hippocampus) (CH), Corticospinal tract (CST), Superior longitudinal fasciculus (SLF), Inferior fronto-occipital fasciculus (IFOF), and Uncinate fasciculus (UF) were analyzed. RESULTS: Two clusters, representing hypomentalization (HypoM) and hypermentalization (HyperM), were identified based on DPS, CPSS, and RFQ responses. One-way ANOVA showed no significant age or gender differences between clusters. The HypoM group exhibited lower PoM scores, higher BDI and BAI scores, and lower RSA scores (ps< 0.05). Structural brain metric comparison showed significant differences in GMV in the right caudal middle frontal gyrus (rcMFG), right superior frontal gyrus (rsFG), and right frontal pole (rFP) between groups. In addition, the HyperM individuals with a higher risk of depression and a higher ratio of intrapersonal to interpersonal factors of resilience were found with reduced GMV on the rcMFG. Additionally, analyses of DTI metrics revealed significant differences between two groups in rATR and rSLF in terms of fractional anisotropy (FA) values; rATR, rCST, rUF, rSLF, rCH and rIFOF in terms of mean diffusivity (MD) values, and radial diffusivity (RD) (corrected p = 0.05). Moreover, the positive correlation between different domains of resilience and white matter (WM) integrity implied further enhancement of intrapersonal or interpersonal resilience factors that are different for people with different mentalization. CONCLUSIONS: The findings underscore the importance of considering both intrapersonal and interpersonal factors in understanding the interactions between psychological resilience and mental health conditions relevant to brain mechanisms.

The mediating role of mentalization and integrative self-knowledge in the relationship between childhood trauma and fear of intimacy.

Introduction: Since intimacy is a fundamental human need within social relationships, and recognizing that a fear of intimacy correlates with various negative consequences, it becomes crucial to examine the origins and factors that contribute to addressing this issue. This research aimed to investigate the mediating roles of mentalization and integrative self-knowledge in the link between childhood trauma and the fear of intimacy. Methods: Conducted as correlational descriptive research, our study incorporates a total sample of 303 adult women and men participants aged 20 to 50 in Tehran using the convenience sampling method. They completed the Fear of Intimacy Scale (FIS), the Childhood Trauma Questionnaire (CTQ), the Mentalization Scale (MentS), and the Integrative Self-Knowledge Scale (ISK). To analyze the research data at the descriptive level, frequency, percentage, standard deviation, and Pearson's correlation coefficient were used, while path analysis tested our hypotheses in SPSS version 26 and AMOS version 24. Fit indices were used to check the model's fit, and the mediation test was performed using the bootstrapping method. The fit indices revealed an excellent fit of the model with the data (χ2 = 1.51, χ2/df = 1.51, p = 0.219; RMSEA = 0.05; SRMR = 0.02; CFI = 0.99; NFI = 0.99; TLI = 0.99). Results: Results indicate mentalization fully mediates the childhood trauma-fear of intimacy relationship (ß = 0.14, p < 0.01). However, the indirect relationship between childhood trauma and fear of intimacy through integrative self-knowledge was insignificant. The results also showed that the path coefficient from mentalization to fear of intimacy was negative and significant (ß = -0.41, p < 0.001), while the path coefficient from integrative self-knowledge to fear of intimacy was not significant (ß = -0.02, p > 0.05). Discussion: Based on the current findings indicating the complete mediation of mentalization and the insignificance of the mediation of integrative self-knowledge, we can deduce that enhancing the capacity for mentalization holds promise in effectively addressing intimacy-related issues. Overall, the study suggests mentalization effectively predicts the relationship between childhood trauma and fear of intimacy. This, in turn, may mitigate the detrimental effects of challenging childhood experiences on an individual's ability to engage in intimacy and cultivate emotional closeness.

Mentalizing deficits in borderline personality disorder related to axis I comorbidity: Clinical relevance.

AIM: Deficits in mentalization have been described in several mental disorders, but information is still scarce and ambiguous about the types of mentalization errors in each disorder and their specificity and severity in borderline personality disorder (BPD). Due to the high comorbidity between this disorder and axis I disorders, the aim of this work is to study differences in mentalization responses in BPD considering the different comorbidity profiles with other disorders. METHODS: A total of 141 BPD patients were evaluated using The Mini-International Neuropsychiatric Interview (MINI), to identify comorbid axis I disorders. Mentalizing ability was assessed by the Movie for the Assessment of Social Cognition (MASC). Statistical associations were analysed into the different variables. RESULTS: Patients with comorbid BPD and anorexia nervosa (AN), suicidal behaviour disorder or post-traumatic stress disorder (PTSD) respectively presented higher overmentalization, undermentalization and absence of mentalization errors, compared with patients with BPD without comorbidity. CONCLUSIONS: Results show that BPD comorbidity with AN, suicidal behaviour disorder and PTSD affect to the types and severity of mentalizing deficits observed in these patients. This study highlights the importance of the assessment and treatment of axis I comorbid disorders in borderline personality disorder, with the objective of shaping personalized treatment for every patient.

Mentalizing self mind but not others: Self-reported mentalization difficulties in multiple sclerosis.

BACKGROUND: Mentalization can be defined as a mental process by which an individual directly or indirectly perceives and interprets one's own and others' behavior, emotions, beliefs, and needs based on designed mental states. Mentalization problems may be linked to remove associative white matter fiber disconnection. Multiple sclerosis (MS) is one of the diseases with white matter lesions. By comparing MS patients with healthy controls, it was aimed to assess whether MS patients' mentalization skills are affected. METHOD: This study involved 243 participants (170 healthy controls and 73 patients with MS). All the participants completed a sociodemographic questionnaire and the Mentalization Scale (MentS). RESULTS: While it was discovered that MentS scores for the dimension of others-based mentalization (MentS-O) were statistically lower in MS group, there was no statistically significant difference between the groups in terms of the dimensions of motivation to mentalize (MentS-M) and self-based mentalization (MentS-S) scores. CONCLUSION: We may conclude that MS patients have trouble comprehending other people's thoughts. This effect can be one of the causes of MS patients' issues with social cognition.

Association between suicidal ideation, negative symptoms and theory of mind in first episode psychosis.

PURPOSE: Suicidal thoughts are common among patients with first episode psychosis (FEP). The impact of symptoms' severity and social cognition on suicidal risk should be a focus of attention. This study aimed at assessment of the severity of suicidal ideation in patients with FEP and its potential association with the theory of mind (ToM) impairment and symptoms' severity. METHODS: Ninety-six participants were recruited consecutively and subdivided into three equal groups: FEP, schizophrenia, and healthy controls (HC). The symptoms' severity was assessed using Positive and Negative Syndrome Scale (PANSS) and Beck Depression Inventory (BDI). Suicidal ideation was evaluated using Beck Scale for Suicidal Ideation (BSSI). Reading the Mind in the Eyes revised version (RMET) was used to assess ToM. RESULTS: Suicidal ideation was significantly higher only in FEP compared to HC (p = 0.001). Both FEP and schizophrenia had substantially lower performance than HC on RMET (p < 0.001). Higher depression (ß = 0.452, p = 0.007) and negative symptoms (ß = 0.433, p = 0.027) appeared to be significantly associated with increased suicidal ideation severity in FEP while RMET did not. CONCLUSION: Patients with FEP and chronic schizophrenia have comparable deficits in theory of mind dimension of social cognition. The severity of negative and depressive symptoms potentially contributes to the increased risk of suicide in FEP.

Exploring the relationships between dominance behavioral system, mentalization, theory of mind and assertiveness: analysis in a non-clinical sample.

Introduction: The dominance behavioral system, a fundamental aspect of human behavior, orchestrates the drive for dominance, regulates dominant-subordinate dynamics, and shapes responses to perceived power dynamics. While the existing literature extensively delves into the components of this system, scant attention is paid to its interplay with mentalization, theory of mind, and assertiveness. Moreover, gender disparities in dominance behaviors are largely studied in terms of biological variables (levels of testosterone) and clinical populations. This study aims to understand the relationships between activation strategies of the dominance behavioral system, mentalization processes, theory of mind abilities, and levels of social discomfort in assertive communication. Moreover, to identify gender differences in the dominance behavioral system in a non-clinical sample. Methods: Our sample was composed of 67 students from a non-clinical population. They claimed the absence of any psychological, neurological, or developmental disorders. Results: A regression analysis was performed, and we found that levels of mentalization predict levels of hyperactivation of dominance behavioral system, but no significant results for the deactivation levels of the system were found. Moreover, no gender differences were found in levels of activations of the dominance behavioral system. Conclusion: These findings underscore the pivotal role of mentalization abilities in interpersonal dynamics, emphasizing the need for individuals to navigate social interactions adeptly. Furthermore, our research unveils implications for individual well-being and psychopathology, urging further investigation into how these dimensions intersect with various psychological disorders. By discerning the intricate mechanisms at play, we can develop targeted therapeutic interventions tailored to specific behavioral patterns, ultimately enhancing psychological resilience and fostering healthier social relationships in a non-clinical population.

Childhood Trauma, Mentalization and Obsessive Compulsive Symptoms in a Non-Clinical Sample: A Mediation Analysis Study.

Objective: Obsessive and compulsive symptoms (OCS) are cross-cutting psychopathological manifestations frequently detected in a variety of clinical and non-clinical samples. It has been suggested that impaired mentalization abilities and traumatic experiences during childhood may be relevant etiopathogenetic factors in the development of OCS. The purpose of the current study was to cross-sectionally assess these variables in a non-clinical sample, testing the mediational role of mentalization abilities in the association between childhood trauma (CT) and OCS. Method: 667 participants (488 females; mean age= 29.76 ± 11.87 years; age range: 18-80) answered a survey including the Childhood Trauma Questionnaire, the Mentalization Questionnaire and the Obsession-Compulsion subscale of the Brief Symptom Inventory. Results: The mediation model was significant for the total effect (p< .001), showing that CT was positively associated with OCS (95% CI: .006; .019) and that this association was mediated by reduced levels of mentalization capacity (95% CI: .003; .009). Such results were significant controlling for potential sociodemographic and clinical confounding variables. Conclusions: The findings contribute to elucidate the complex relationships between CT, mentalization capacity, and OCS, supporting the possibility that mentalization impairments, arising from CT, may affect top-down control mechanisms thus contributing to the development of OCS.

Socially isolated, but not lonely in lockdown: Exploring the role of reflective functioning as a protective factor in the early days of the COVID-19 pandemic in Germany.

INTRODUCTION: Loneliness is a pressing public mental health issue. So far, there has been a paucity of investigations focused on the individual differences modulating this subjective feeling in the face of difficult circumstances, e.g., the COVID-19 pandemic. As such, the present study aimed to investigate the role of mentalization; given that the construct comprises reflection abilities that might be particularly relevant to the pandemic's interpersonal challenges. METHODS: A survey representative of the German population was conducted from May to June 2020 (N = 2503). We examined mentalization, operationalized as reflective functioning (RF) and measured using the Mentalization Questionnaire (MZQ), both as a protective factor against loneliness on its own and as a moderator of the association of social isolation with loneliness. RESULTS: Of the overall sample, 822 (32.8 %) individuals reported social isolation. Worse RF was moderately associated with higher levels of loneliness (r = 0.433, p < .001). A linear regression model (controlling for sociodemographic characteristics and general personality pathology) confirmed this positive association, but also indicated an interaction effect of RF and social isolation in the statistical prediction of loneliness. Stratified models showed that RF was a comparatively weaker statistical predictor of loneliness among the socially isolated. DISCUSSION: This representative population study expanded our knowledge about the factors shaping loneliness in the population. RF emerged as a potentially modifiable protective influence. Further research needs to clarify the mechanisms through which it mitigates loneliness. LIMITATIONS: The cross-sectional design does not give insight into the temporal association of RF and loneliness.

Minding mentalizing - convergent validity of the Mentalization Breakdown Interview.

Objectives: Mentalizing difficulties are central to borderline personality disorder (BPD), have severe consequences, and are an explicit focus in mentalization-based treatment. The significance of mentalizing capacity as a predictor or mediator of change is however still uncertain due to a scarcity of research. The Mentalization Breakdown Interview (MBI) was developed as a time saving tool for studying psychotherapy processes and outcome in borderline pathology. This study aimed to investigate the convergent validity of reflective functioning (RF) ratings based on the MBI (MBI-RF) by a comparison with the gold standard, i.e., RF assessments based on the Adult Attachment Interview (AAI-RF). A secondary aim was to investigate how MBI-RF relates to core symptoms of BPD, levels of functional impairment and symptom distress compared with AAI-RF. Method: Forty-five patients with BPD or significant BPD traits were included. MBI-RF and AAI-RF were rated using the Reflective Functioning Scale. Levels of MBI-RF and AAI-RF and the correlation between the measures were calculated, as well as their associations with the Difficulties in Emotion Regulation Scale, Levels of Personality Functioning-Brief Form 2.0, Work and Social Adjustment Scale, Patient Health Questionnaire, Depression, Generalized Anxiety Disorder-7, self-harm, suicide attempts, and PD diagnostics. Results: The correlation between MBI-RF and AAI-RF was 0.79 (p<0.01), indicating high convergent validity. There were few significant associations between MBI-RF and AAI-RF and clinical measures. Conclusions: The study provides support for the convergent validity of the MBI as a BPD-focused RF assessment method. The MBI has the potential as a time saving, reliable and valid method to be applied in treatment research on patients with borderline pathology. The results indicate that measures of MBI-RF and AAI-RF are different from clinical symptoms. Clinical trial registration: ClinicalTrials.gov ID NCT04157907.