Dimensional approaches to studying, assessing, and treating traumatic stress: Introduction to the Special Section.

Dimensional models of psychopathology are gaining empirical support and are, thus, increasingly common in research and clinical practice. This is true for traumatic stress studies, although the movement toward dimensional conceptualizations of traumatic stress may be somewhat slower, perhaps due at least in part to how trauma is diagnosed. The purpose of this special section is to collect and showcase cutting-edge basic, applied, and conceptual work on dimensional models of traumatic stress. Its goal is to highlight the utility of such models and to facilitate greater connection between traumatic stress studies and the broader dimensional movement in psychopathology.

The Impact of Cognitive Behavioral Therapy for Substance Use Disorders on Veterans' Interpersonal Difficulties.

Background: Substance use disorders (SUDs) negatively impact veterans and their relationships with others. Although there are several evidence-based treatments for SUD symptoms, there is less research on whether reduction in SUD symptoms coincides with reduction in interpersonal difficulties. Methods: In this study we examined the relationship between SUD and relationships in a national sample of 458 veterans who received approximately 12 sessions of Cognitive Behavioral Therapy for Substance Use Disorders (CBT-SUD) through the Veterans Health Administration (VHA). Results: Parallel latent growth curve modeling (LGCM) indicated that self-reported alcohol use, drug use, and interpersonal difficulties decreased over the course of treatment. Alcohol and drug use were positively associated with each other and with interpersonal difficulties at each time point, and baseline alcohol and drug use were negatively associated with the reduction of use over time. However, there was little evidence that reductions in substance use led to a reduction in interpersonal difficulties (or vice-versa). Conclusions: Findings highlight promising strategies to further understand how CBT-SUD may enhance reductions in substance use as well as improve relationships with family and friends.

Betrayal Trauma and Histrionic Personality Pathology.

Histrionic personality disorder is among the most common forms of personality pathology, and recent research on it has focused on its associations with trauma. This research has focused primarily on the types of traumatic experiences people endure, highlighting the role of sexual trauma in particular. However, recent research on the association between traumatic events and histrionic personality characteristics has not taken into account the role of traumatic experiences characterized by interpersonal betrayal, which research suggests is associated with personality pathology in general. In this study, we examine this, evaluating the association between traumatic experiences with varying degrees of betrayal on histrionic personality characteristics in a sample of men and women recruited online (N = 364). Results suggested that interpersonal trauma without a high degree of betrayal as well as non-interpersonal trauma had positive associations with histrionic personality characteristics, but interpersonal trauma with a high degree of betrayal did not. Further analysis indicated that sexual trauma both with and without a component of betrayal was associated with histrionic personality characteristics for women but not men. Study findings add to the research on the potential traumatogenic origins of histrionic personality characteristics and provide numerous directions for future research.

Association Between Betrayal Trauma and the PAI Traumatic Stress Scale.

The Personality Assessment Inventory (PAI) is among the most commonly used broadband inventories of psychological functioning. For the purposes of assessing trauma specifically, the most relevant aspect of the PAI is the Traumatic Stress subscale of the Anxiety-Related Disorders scale (ARD-T), which measures the degree to which a person feels wounded by something in their past. Research suggests that ARD-T is associated with exposure to a variety of different traumatic stressors. However, there is little research on the degree to which traumatic stressors that entail a component of interpersonal betrayal (i.e. betrayal trauma) are associated with higher scores on ARD-T relative to other stressors. In this study, we evaluated the relative associations between traumas with varying degrees of betrayal and scores on ARD-T in a secondary analysis of two non-clinical samples (college sample N = 494; crowdsourced sample N = 364) using a Bayesian approach to multiple regression. In both samples, traumas with both high and medium (but not low) degrees of betrayal were associated with elevated ARD-T scores. Findings suggest that ARD-T scores are associated with interpersonal trauma regardless of betrayal, which has implications for interpretation of the ARD-T scale in practice.

Influence of Betrayal Trauma on Schizoid Personality Pathology.

Schizoid personality pathology is among the most debilitating and enigmatic forms of personality pathology. Some have suggested that a potential etiological influence on schizoid pathology is trauma. Thus far, research on the association between trauma and schizoid pathology has focused primarily on type of trauma (e.g., abuse vs. neglect during childhood) rather than who perpetrated the trauma. This contrasts with recent research on trauma perpetrated by someone upon whom the survivor relies and/or trusts (i.e. betrayal trauma), which many studies show has a uniquely pernicious association with several forms of personality pathology. However, this has not yet been examined with respect to schizoid pathology specifically. In this study, we examined the relative associations between trauma varying degrees of betrayal and schizoid personality pathology in a sample recruited from Amazon's Mechanical Turk (N = 300) using a Bayesian approach to structural equation modeling. Results suggest that interpersonal trauma in general was associated with higher levels of schizoid pathology. Findings further indicate that for men but not women, trauma with a high degree of betrayal was uniquely associated with schizoid pathology. These findings contribute to the growing body of research suggesting the influence of interpersonal trauma in general and betrayal trauma in particular on personality pathology and have implications for future research on and intervention with people with high levels of schizoid pathology.

The role of unit cohesion and perceived resilience in substance use disorder.

Soldiers have high rates of substance use disorders (SUD), often in the aftermath of stressors experienced during military deployments. There are several factors that protect against SUD. For example, individual factors like perceived resilience and group factors such as unit cohesion may make someone less likely to abuse substances. However, there is little research on the differential influence of these resilience factors on SUD over and above deployment stressors. In this study, we examined the relative effects of perceived resilience, unit cohesion, and deployment stressors on SUD in a sample of 21,449 active duty and reserve soldiers from the U.S. Army (primarily White and male, mean age = 28.66, SD = 7.41) using structural equation modeling. We found that unit cohesion (ß = -.17) and perceived resilience (ß = -.16) had negative effects on SUD over and above deployment stressors. The study findings clarify research on resilience to SUD and have implications for addressing substance use in the military, specifically regarding the importance of building unit cohesion.

Associations of humor, morale, and unit cohesion on posttraumatic stress disorder symptoms.

Military personnel experience many stressors during deployments that can lead to symptoms of posttraumatic stress disorder (PTSD). However, not all military personnel who are exposed to deployment stressors develop PTSD symptoms. Recent research has explored factors that contribute to military personnel resilience, a multifaceted and multidetermined construct, as a means to mitigate and prevent PTSD symptoms. Much of this research has focused on the effects of individual-level factors (e.g., use of coping strategies like humor, the morale of individual unit members), with some research focusing on unit-level factors (e.g., the cohesiveness of a unit). However, there is little research exploring how these factors relate to each other in mitigating or reducing PTSD symptoms. In this study, we examined the association between deployment stressors, perceived unit cohesion, morale, humor, and PTSD symptoms in a sample of 20,901 active-duty military personnel using structural equation modeling. Results indicated that perceived unit cohesion, humor, and morale were positively associated with each other and negatively associated with PTSD symptoms over and above the effect of deployment stressors. These findings highlight the influence of resilience factors on PTSD symptoms beyond their substantial overlap and have implications for future research as well as the potential development of interventions for military personnel.

Relative Effects of Sexual Assault and Temperament Traits on Cognitive Characteristics of Histrionic Personality Disorder.

Histrionic personality disorder (HPD) is a common and problematic form of personality pathology involving excessive attention-seeking, often through overly sexualized means. Much of the research on HPD has involved the association between HPD characteristics and basic temperament traits. Given the sometimes hypersexualized presentation of HPD, another potential influence on HPD characteristics may be exposure to sexual assault. However, there is little research on the association between sexual assault and HPD in general or with respect to temperament traits in particular. In this study, we examine the relative associations of sexual assault and temperament traits with the cognitive characteristics of HPD in a large sample of college students (N = 965) using a Bayesian approach to the analysis of covariance. Results suggest that sexual assault is associated with HPD cognitive characteristics over and above the robust influence of temperament traits. The study findings have implications for future research on and clinical intervention with people with HPD.

Influence of Child Abuse and Neglect on Histrionic Personality Pathology.

Histrionic personality pathology is among the most common forms of personality pathology, although little is known about its potential risk factors. One possible factor that may influence histrionic personality pathology is childhood trauma, most notably sexual abuse and physical/emotional neglect. However, there is little research on how these and other forms of childhood trauma may influence histrionic personality pathology relative to each other. To address this, in this study we examined the relative effects of different forms of child abuse and neglect on histrionic personality pathology in a sample of women and men from Amazon's Mechanical Turk (N = 399) using a Bayesian approach to structural equation modeling. Results suggest that child sexual abuse is the strongest predictor of histrionic personality pathology in adulthood. However, this differs between women and men such that physical neglect also predicts histrionic personality pathology for women, whereas physical and emotional abuse as well as emotional neglect predict histrionic personality pathology for men. These findings provide insight into the developmental precursors to histrionic personality pathology and have implications for research on and clinical intervention with people exhibiting histrionic personality pathology.

Thinking hierarchically about posttraumatic response: Commentary on Lehinger et al. (2022).

Lehinger et al.'s (2022) study on the associations between posttraumatic stress symptoms, posttraumatic cognitions, and alcohol use in sexual assault survivors extends previous research on posttraumatic response to sexual trauma. The study is useful for these purposes but it also raises other interesting questions about the nature of posttraumatic response and the structure of psychopathology more generally. In this commentary, we describe Lehinger et al.'s (2022) study and its findings and discuss their potential relevance for emerging transdiagnostic, hierarchical models of psychopathology.

Influence of Betrayal Trauma on Psychopathy.

Psychopathy is a virulent form of personality pathology that exerts a costly burden on society. Although there is a strong hereditary component to psychopathy, the environment also has an impact. One of the most salient environmental influences is trauma, although not all forms of trauma may be equally predictive of psychopathy. Many studies suggest that trauma perpetrated by someone whom the victim trusts and relies upon (i.e., betrayal trauma) has an especially robust influence on personality pathology. However, there has not yet been research examining this with respect to psychopathy specifically. In this study we examined the influence of traumas with varying degrees of betrayal on psychopathy in a sample of men and women working for Amazon's Mechanical Turk (N = 444) using partial least square structural equation modeling. Results suggest that interpersonal trauma in general was associated with psychopathy for both men and women, and that trauma high in betrayal was uniquely associated with psychopathy among men. These results clarify previous research on the association between betrayal trauma and personality pathology and on the traumatic antecedents of psychopathy in particular.

Influence of Betrayal Trauma on Schizotypal Personality Pathology.

Schizotypal personality pathology (SZP) is a persistent and debilitating problem for a substantial number of people. Research on SZP has typically emphasized its biological and more specifically genetic origins. However, recent research has highlighted the potential influence of trauma on SZP. This research is promising, although it has thus far focused primarily on type of trauma (e.g., different types of abuse vs. neglect in childhood) rather than who perpetrated the trauma. Previous studies on both personality pathology in general and psychotic-spectrum experiences characteristic of SZP in particular have highlighted the influence of trauma perpetrated by someone with whom the trauma survivor was close (i.e., betrayal trauma), although this has not yet been examined with respect to SZP specifically. In this study we examined this, evaluating the influence of trauma with varying degrees of betrayal on SZP in a sample of adults (N = 364) using structural equation modeling. Results suggest that interpersonal trauma in general was associated with higher levels of SZP. Findings further indicate that for women but not men, trauma with a high degree of betrayal was uniquely associated with SZP. These results underscore the potential role of trauma in SZP and have implications for future research on and intervention with people with high levels of SZP.

Influence of Personality Traits on Post-Traumatic Cognitions of Sexual Assault.

Sexual assault is a common form of trauma that is associated with psychological distress for many people who experience it. One factor that influences the degree to which sexual assault survivors exhibit distress is the cognitions they form related to the assault in its aftermath. The more times the assault happens, the more disruptive are the post-traumatic cognitions, although both the frequency of sexual assault and nature of post-traumatic cognitions differ by gender. Another factor that may influence post-traumatic cognitions is personality, which emerging research suggests has an influence on post-traumatic response in general and post-traumatic cognitions in particular. However, there is little research on the influence of personality on post-traumatic cognitions related to sexual assault specifically. In this study, we examine the association between personality traits (Agreeableness, Conscientiousness, Extraversion, Neuroticism, and Openness) and post-traumatic cognitions of sexual assault in a sample of sexual assault survivors recruited from Amazon's Mechanical Turk (N = 303) using a Bayesian approach to multiple regression. Results suggest that although the influence of traits varied depending on the post-traumatic cognition under analysis and the sex of the sexual assault survivor, Neuroticism was the primary predictor of post-traumatic cognitions over and above sexual assault frequency, although this applied more for men than for women. Study findings clarify previous research on the role of personality traits in post-traumatic response and suggest directions for future research and clinical intervention.

Incremental Influence of Betrayal Trauma and Personality Traits on PTSD Symptoms.

Symptoms of posttraumatic stress disorder (PTSD) are common reactions to trauma. One factor that influences the manifestation of PTSD symptoms is the type of trauma experienced. Traumas perpetrated by someone on whom the trauma survivor trusts and relies on for support (i.e., betrayal traumas) are especially predictive of PTSD symptoms. However, the degree to which this is true differs somewhat across men and women. Another factor that influences PTSD symptoms is personality, which is most often operationalized in terms of discrete personality traits. Among these traits, Neuroticism (the tendency to experience negative affect) is linked to a wide range of psychological dysfunction in general and to PTSD symptoms in particular. However, there is little research on how trauma type and personality differentially influence PTSD symptoms. To address this gap, in this study we examined the incremental effects of traumas with varying degrees of betrayal and personality traits on PTSD symptoms in a sample of college students (N = 276) using a Bayesian approach to multiple regression. Results suggest that Neuroticism and trauma at all levels of betrayal were associated with higher levels of PTSD symptoms, although this differed across sex. These results are consistent with previous research that identifies Neuroticism as a risk factor for a wide range of mental health problems and clarifies earlier findings on betrayal trauma.

Influence of Betrayal Trauma on Antisocial Personality Disorder Traits.

Antisocial personality disorder (ASPD) is linked to a number of social problems and accordingly is the focus of intensive empirical study. There is reason to believe that ASPD is influenced at least in part by exposure to trauma, but there has been minimal research on the association between trauma and ASPD traits. Specifically, research has not examined how traumatic experiences with different degrees of interpersonal betrayal differentially influence ASPD traits. This is notable in light of recent studies indicating that exposure to traumatic experiences high in betrayal (i.e., high betrayal trauma) is the primary predictor of borderline and narcissistic personality pathology. In this study, we examined the relative associations between high, medium, and low betrayal trauma and ASPD traits in a sample recruited from Amazon's Mechanical Turk (N = 363) using structural equation modeling. Results confirmed a strong association between trauma and ASPD traits in general, although the influence of specific forms of trauma differed depending on both sex and how trauma was calculated (i.e., in terms of severity vs. exposure). In general, high betrayal trauma was the most consistent predictor of ASPD traits for men, whereas medium and low betrayal traumas were more consistently associated with ASPD traits for women. Study findings extend research on betrayal trauma to more malevolent forms of personality pathology. Sex differences in the influence of trauma across ASPD traits suggest the possibility of sex-specific personality responses to trauma high in betrayal, a topic that can be addressed in the future research.

Influence of personality traits on college women's appraisals of intimate partner violence.

Intimate partner violence (IPV) is a common traumatic stressor for young adult women and results in a number of problems for those who experience it. The appraisals women make of IPV influence the degree of distress they experience in the aftermath of IPV. Research suggests that personality traits may influence IPV appraisals, although there are relatively few studies of this. In this study, we examine the association between Five Factor Model personality traits (i.e., Agreeableness, Conscientiousness, Extraversion, Neuroticism, and Openness) and appraisals of IPV in a sample of young adult women in college who experienced IPV (N = 241) using a Bayesian approach to multiple regression. Results suggest that Agreeableness, Extraversion, and Neuroticism predicted different styles of appraisals over and above the effect of IPV severity. Study findings clarify previous research on the role of personality traits in the response to IPV and suggest directions for future research.

Interpersonal Style and Posttraumatic Stress Disorder Symptoms in Female Victims of Dating Violence.

Symptoms of posttraumatic stress disorder (PTSD) are some of the most common mental health symptoms women experience following exposure to dating violence (DV). However, not all women who experience DV exhibit PTSD symptoms. One factor that may influence whether or not women exhibit PTSD symptoms in the aftermath of DV exposure is interpersonal style, often operationalized in terms of two orthogonal dimensions, warmth and dominance. In this study, we examined the main and moderating effects of warmth and dominance on the association between DV and PTSD symptoms using latent moderating structural equation modeling in a sample of 303 female college students who reported DV exposure in the past year. Results indicated that warmth exerted a main effect predicting fewer PTSD symptoms. In addition, dominance moderated the association between DV and PTSD symptoms such that at high levels of DV, women who were high on dominance reported fewer PTSD symptoms than did women who were low on dominance. These findings suggest that aspects of interpersonal style may promote resilience to symptoms of posttraumatic stress following DV exposure. Directions for future research are also discussed.

Influence of betrayal trauma on borderline personality disorder traits.

Recent research has linked traumatic experiences with a high degree of betrayal with symptoms of borderline personality disorder (BPD). Much of this research has operationalized BPD in terms of diagnostic symptoms, which contrasts with recent approaches to understanding personality disorders (PDs) in terms of maladaptive personality traits. In this study we examine the influence of traumatic experiences with varying levels of betrayal on BPD assessed via maladaptive personality traits in a sample of college students (N = 915) using a Bayesian approach to structural equation modeling. Results suggest that trauma with a high degree of betrayal (high betrayal trauma) was the only credible predictor of BPD traits when other traumatic experiences (medium and low betrayal trauma) were taken into account, and that this effect did not vary across sex. Future research directions and clinical implications are also discussed.

Betrayal trauma and dimensions of borderline personality organization.

Borderline personality pathology can be conceptualized as one of many conditions within a broader spectrum of borderline personality organization (BPO). This spectrum is composed of several specific dimensions of psychological functioning (primitive psychological defenses, identity diffusion, and reality testing). Although several theories associate trauma with borderline pathology, betrayal trauma theory specifies that trauma with a high degree of betrayal has an especially pernicious influence on borderline pathology. In addition, betrayal trauma theorists propose that constructs related to each BPO dimension are influenced by traumatic betrayal, but this has not yet been tested within the context of borderline pathology specifically. In this article, we examine the relation between trauma with varying levels of betrayal and the specific dimensions of BPO using a Bayesian approach to multiple regression. Results indicated that trauma with a high degree of betrayal was associated with each dimension of BPO, that medium betrayal trauma was associated with problems in reality testing, and that low betrayal trauma was associated with primitive psychological defenses. These effects differed by gender. Limitations of the study and directions for future research are also discussed.

An Evolutionary Perspective on the DSM-5 Alternative Model for Personality Disorders.

Recent work has nested the Alternative Model for Personality Disorders (AMPD) within several theoretical paradigms of personality and clinical psychology (e.g., multivariate, psychodynamic). This has both spurred on additional research and aided in practical application. Connecting the model to other theoretical heuristics may lead to further advances. One candidate for such a theory is that of evolutionary psychology, which attempts to provide explanations of human behavior (including personality traits) rooted in adaptation. In this article, we review and integrate the theoretical and empirical literature on the AMPD and evolutionary psychology, providing a synthesis of the two models in the hope of furthering the research and application of both.