Capturing Between- and Within-Person Variability of Borderline Traits in Youth from a Developmentally Sensitive Situational Judgment Perspective.

The significance of early maladaptive traits for understanding the roots of borderline personality disorder (BPD) is increasingly endorsed. Given the interpersonal nature of BPD and fluctuations in phenotypic symptomatology, this study aims to test the assumption that a situation-contingent contextualized assessment of borderline traits is a viable avenue to more fully capture the way underlying traits are reflected in socioaffective behavior that occurs in age-relevant situations. We aimed to explore the extent to which the variability on these responses represents a meaningful construct for understanding the clinical richness of BPD. Toward this end, a contextualized measure of DSM-5 BPD traits was developed along a situational judgment test (SJT) format, allowing us to explore both between-person and within-person variability in a more economic format than repeated measurement does. Examination of the psychometric properties of the SJT revealed distinctive correlational patterns of the situation-based traits with symptom scales of a youth BPD measure, but also indicated that for certain traits consistency in trait level across different situations is more maladaptive, whereas for other traits a greater degree of variability in trait expression is more maladaptive. Overall, this work could set the stage for further research on the potential of SJTs for understanding personality vulnerabilities both at the dispositional and the dynamic level.

Testing the structure and process of personality using ambulatory assessment data: An overview of within-person and person-specific techniques.

In the present article, we discuss the potential of ambulatory assessment for an idiographic study of the structure and process of personality. To this end, we first review important methodological issues related to the design and implementation of an ambulatory assessment study in the personality domain, including methods of ambulatory assessment, frequency of measurement and duration of the study, ambulatory assessment scales and questionnaires, participant selection, training and motivation, and ambulatory assessment hard- and software. Next, we provide a detailed outline of available analytical approaches that can be used to analyze the intensive longitudinal data generated by an ambulatory assessment study. By doing this, we hope to familiarize personality scholars with these methods and to provide guidance for their use in the field of personality psychology and beyond. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

The DSM-5 Trait Measure in a Psychiatric Sample of Late Adolescents and Emerging Adults: Structure, Reliability, and Validity.

The inclusion of a dimensional trait model of personality pathology in DSM-5 creates new opportunities for research on developmental antecedents of personality pathology. The traits of this model can be measured with the Personality Inventory for DSM-5 (PID-5), initially developed for adults, but also demonstrating validity in adolescents. The present study adds to the growing body of literature on the psychometrics of the PID-5, by examining its structure, validity, and reliability in 187 psychiatric-referred late adolescents and emerging adults. PID-5, Big Five Inventory, and Kidscreen self-reports were provided, and 88 non-clinical matched controls completed the PID-5. Results confirm the PID-5's five-factor structure, indicate adequate psychometric properties, and underscore the construct and criterion validity, showing meaningful associations with adaptive traits and quality of life. Results are discussed in terms of the PID-5's applicability in vulnerable populations who are going through important developmental transition phases, such as the step towards early adulthood.

Understanding adolescent personality pathology from growth trajectories of childhood oddity.

Research on developmental trajectories of early maladaptive features for understanding later personality disorders (PDs) is increasingly recognized as an important study area. The course of early odd features is highly relevant in this regard, as only a few researchers have addressed childhood oddity in the context of emerging PDs. Using latent growth modeling, the current study explores growth parameters of odd features in a mixed sample of Flemish community and referred children (N = 485) across three measurement waves with 1-year time intervals. Personality pathology was assessed at a fourth assessment point in adolescence. Beyond a general declining trend in oddity characteristics, the results demonstrated that both an early onset and an increasing trend of oddity-related characteristics over time are independent predictors of adolescent PDs. Childhood oddity tends to be the most manifest precursor for PDs with a core oddity feature (i.e., the schizotypal and borderline PD), but also appears to predict most of the other DSM-5 PDs. Results are discussed from an overarching developmental framework on PDs (Cicchetti, 2014), specifically focusing on the principle of multifinality. From a clinical perspective, the significance of increasing or steady-high childhood oddity trajectories for adolescent PDs highlights the relevance of systematic screening processes across time.

A five-factor model of developmental personality pathology precursors.

There is growing consensus that the dimensional structure of early personality pathology can be organized within a similar framework as in adults (De Clercq, De Fruyt, Van Leeuwen, & Mervielde, 2006; Tromp & Koot, 2008). From this perspective, the Dimensional Personality Symptom Itempool (DIPSI) was recently expanded from a 4- to a 5-dimensional trait structure (Verbeke & De Clercq, 2014), including Disagreeableness, Emotional Instability, Introversion, Compulsivity, and Oddity. This developmental maladaptive trait structure is in need of further research, however, before it can be accepted as a valid framework for describing early manifestations of personality dysfunction. By use of exploratory structural equation modeling (ESEM) analyses, the current study explored the fit of the 5-factor DIPSI framework across 4 different samples (N = 1456), and replicated 5 higher-order factors that demonstrated scalar invariance across age and metric invariance across informants and clinical status. These results underscore the robustness of 5 underlying dimensions of personality pathology at a young age and highlight adequate psychometric properties of the proposed DIPSI measure for describing childhood personality pathology precursors. (PsycINFO Database Record

The relevance of schizotypal traits for understanding interpersonal functioning in adolescents with psychiatric problems.

Social relationships are considered highly important throughout adolescence (Kenny et al., 2013), both for the further development and consolidation of identity, social roles, and skills. The schizotypal personality disorder (STPD) has a strong negative impact on these relationships with both parents and peers (Cramer et al., 2006; Hengartner et al., 2014), and can thus be considered as a risk factor for early maladaptive social functioning. The current study focuses on the relevance of different dimensional STPD traits for understanding social functioning, by examining their unique associations with global and more specific parental and peer relationship characteristics in a group of referred late-adolescents (N = 205, mean age = 20.27). Negative schizotypal traits, assessed by the Diagnostic and Statistical Manual of Mental Disorders (5th ed.; DSM-5; American Psychiatric Association, 2013) STPD traits Restricted Affectivity, Withdrawal, and Suspiciousness (Krueger et al., 2012) appeared to be a unique predictor for less maternal and peer social support. Positive schizotypal traits were measured with the age-specific Oddity trait scale (Verbeke & De Clercq, 2014) and proved to be a unique predictor beyond negative schizotypal traits for negative interactions with adolescents' mother and a best friend. These results highlight the heterogeneous nature of the STPD construct and suggest that a dimensional description may contribute to a more detailed understanding of how the STPD relates to poor interpersonal relationship quality in vulnerable adolescents. (PsycINFO Database Record

Exploring the complexity of the childhood trait-psychopathology association: Continuity, pathoplasty, and complication effects.

Four different models have been generally proposed as plausible etiological explanations for the relation between personality and psychopathology, namely, the vulnerability, complication, pathoplasty, and spectrum or continuity model. The current study entails a joint investigation of the continuity, pathoplasty, and complication models to explain the nature of the associations between early maladaptive traits and psychopathology over time in 717 referred and community children (54.4% girls), aged from 8 to 14 years. Across a 2-year time span, maladaptive traits and psychopathology were measured at three different time points, thereby relying on comprehensive and age-specific dimensional operationalizations of both personality symptoms and psychopathology. The results demonstrate overall compelling evidence for the continuity model, finding more focused support for pathoplasty and complication effects for particular combinations of personality symptoms and psychopathology dimensions. As expected, the continuity associations were found to be more robust for those personality-psychopathology associations that are conceptually closer, such as the emotional instability/introversion-internalizing problems association and the disagreeableness-externalizing problems association. Continuity associations were also stronger when personality was considered from a maladaptive rather than from a general trait perspective. The implication of the findings for the treatment of psychopathology and personality symptoms are briefly discussed.

Integrating oddity traits in a dimensional model for personality pathology precursors.

Current dimensional measures of early personality pathology (e.g., the Dimensional Personality Symptom Item Pool, DIPSI; De Clercq, De Fruyt, Van Leeuwen, & Mervielde, 2006) describe personality difficulties within a 4-dimensional framework. The present study corroborates recent evidence on the relevance of including a 5th Oddity-related domain for a more comprehensive description of personality pathology, and presents the construction of an empirically based taxonomy of early Oddity features. Psychometric and factor analytic procedures were conducted on self- and maternal ratings of adolescents (N = 434), resulting in 4 internally consistent facets that empirically collapse in 1 higher-order "Oddity" factor. From a structural perspective, this Oddity factor emerged as a clear 5th factor beyond the earlier proposed 4-dimensional structure of child and adolescent personality pathology. Significant associations of Oddity with both general and maladaptive trait equivalents support the construct validity of this 5th factor, and challenge current hypotheses on the applicability of the continuity hypothesis on general and maladaptive trait variance within the openness field. The results further suggest that Oddity traits are meaningfully associated with general psychopathology at a young age. These findings are discussed in terms of the importance of including a 5th Oddity-related factor in dimensional models of developmental personality pathology in order to acquire a more comprehensive description of the building blocks that underlie early personality difficulties.