This article conceptualizes Anorexia Nervosa (AN) as a prototypical overcontrolled disorder, characterized by low receptivity and openness, low flexible control, pervasive inhibited emotional expressiveness, low emotional awareness, and low social connectedness and intimacy with others. As a result, individuals with AN often report high levels of emotional loneliness. A new evidence-based treatment, Radically Open Dialectical Behavior Therapy (RO-DBT), and its underlying neuroregulatory theory, offer a novel way of understanding how self-starvation and social signaling deficits are used as maladaptive regulation strategies to reduce negative affect. RO-DBT proposes that rather than trying to be 'emotionally regulated' or achieving equanimity, long-term psychological well-being is achieved by increasing social connectedness. RO-DBT skills, including body posture, gestures, and facial expressions, activate brain regions that increase social safety responses that function to automatically enhance the open-minded and flexible social-signaling, which are crucial for establishing long-term intimate bonds with others and becoming part of a "tribe."

The alternative dimensional model for personality disorder (PD) in DSM-5, Section III (DSM-5-III) includes two main criteria: (A) personality-functioning impairment, and (B) personality-trait pathology; provides specific functioning-and-trait criteria for six PD-type diagnoses; and introduces PD-trait specified (PD-TS), which requires meeting the general PD criteria and not meeting criteria for any specific PD type. We termed this Simple PD-TS and developed two additional definitions: Mixed PD-TS, meeting criteria for one or two PD types and having five or more additional pathological traits; and Complex PD-TS, meeting criteria for three or more PD types. In a mixed sample of 165 outpatients and 215 community adults screened to be at high-risk for PD, we investigated the effect of these additional definitions on prevalence, coverage, comorbidity, and within-diagnosis heterogeneity, and conclude that eliminating the PD-type diagnoses and thus having PD-TS as the only PD diagnosis would be both more parsimonious and more useful clinically.

The alternative dimensional model of personality disorder (PD) diagnosis, based on personality‐functioning impairment and pathological traits, opens the door for tailoring treatments to individuals with more homogeneous personality profiles than diagnostic categories. Such a transdiagnostic PD treatment approach requires robust, replicable, personality‐relevant dimensions, which we found using a large battery of self‐report measures: Self‐pathology and negative affectivity (NA) traits, interpersonal pathology and detachment traits, and interpersonal pathology and antagonism traits. Using these dimensions, we identified three groups that had, respectively, elevations on (1) all three dimensions, (2) self‐pathology/NA (with/without interpersonal–pathology elevation(s)) and (3) either or both interpersonal‐pathology dimensions, without elevated self‐pathology/NA. Using the same personality‐functioning measures and a half‐overlapping trait set, we replicated these profiles in an additional sample. Interview‐based measures of functioning and personality pathology provided external validity evidence for the method, suggesting it represents a critical first step towards treatment research targeting transdiagnostic processes rather than diagnoses. For example, two groups might benefit from treatments focused, respectively, on emotional dysregulation and interpersonal relations, whereas the multiple‐problem group may need a sequenced treatment approach. Research is needed to test these hypotheses and to expand the method to include a wider range of pathological personality traits. © 2019 John Wiley & Sons, Ltd.

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