Psychometric properties of the Distress Tolerance Scale in a clinical sample.

The factor structure, reliability, and concurrent validity of the Distress Tolerance Scale were evaluated in a large outpatient sample ( = 775). Prior research demonstrates mixed findings regarding the most appropriate factor structure, finding evidence for the presence of four subfactors as well as a potential second-order (hierarchical) General Distress Tolerance factor. Competing factor structures were compared using confirmatory factor analyses.

Facets of Emotion Regulation and Emotional Disorder Symptom Dimensions: Differential Associations and Incremental Validity in a Large Clinical Sample.

A growing literature suggests robust associations between dimensions of emotion regulation and emotional disorder psychopathology. However, limited research has investigated associations of emotion regulation dimensions across several emotional disorders (transdiagnostic associations), or the incremental validity of emotion regulation versus the higher-order construct of neuroticism. The current study used exploratory structural equation modeling and a large clinical sample (N = 1,138) to: (a) develop a multidimensional emotion regulation measurement model, (b) evaluate the differential associations between latent emotion regulation dimensions and five latent emotional disorder symptom dimensions (social anxiety, depression, agoraphobia/panic, obsessions/compulsions, generalized worry), and (c) determine the incremental contribution of emotion regulation in predicting symptom dimensions beyond neuroticism.

Distinct Risk Profiles in Social Anxiety Disorder.

Using a factor mixture model (FMM) approach, this study examined if SAD could be subtyped by distinct risk profiles, and whether these subtypes predicted different manifestations of the disorder. We derived risk profiles from neurotic temperament (NT), positive temperament (PT), and autonomic arousability (AA), which are hypothesized to be important in the maintenance of anxiety disorders such as SAD. In our sample of 758 SAD outpatients, a two-class FMM solution fit the data best.

Developing algorithms to predict adult onset internalizing disorders: An ensemble learning approach.

A growing literature is utilizing machine learning methods to develop psychopathology risk algorithms that can be used to inform preventive intervention. However, efforts to develop algorithms for internalizing disorder onset have been limited. The goal of this study was to utilize prospective survey data and ensemble machine learning to develop algorithms predicting adult onset internalizing disorders.

Parent perceptions of mental illness in Chinese American youth.

Background: Although parents are often the first to facilitate help-seeking in their children, parental perceptions regarding mental health serve as a significant barrier to the access of mental health services. This study examined mental health perceptions held by Chinese immigrant parents of youth.

Methods: Eighteen parents (13 female, 5 male), who identified as having children between the ages of 13 and 21 years, participated in audio-recorded interviews using five vignettes depicting depression with and without a somatic emphasis, schizophrenia with paranoid features, attenuated psychosis syndrome, and social anxiety in youth.

Comorbidity in trichotillomania (hair-pulling disorder): A cluster analytical approach.

Background: A promising approach to reducing the phenotypic heterogeneity of psychiatric disorders involves the identification of homogeneous subtypes. Careful study of comorbidity in obsessive-compulsive disorder (OCD) contributed to the identification of the DSM-5 subtype of OCD with tics. Here we investigated one of the largest available cohorts of clinically diagnosed trichotillomania (TTM) to determine whether subtyping TTM based on comorbidity would help delineate clinically meaningful subgroups.

The Contribution of Worry Behaviors to the Diagnosis of Generalized Anxiety Disorder.

Worry behaviors (i.e., overt acts to avoid or cope with worry-induced distress) have been recognized as being important in the psychopathology and treatment of generalized anxiety disorder (GAD).

Anxious distress in depressed outpatients: Prevalence, comorbidity, and incremental validity.

The goals of this study were to estimate the prevalence of the DSM-5 anxious distress specifier (AD) among depressed outpatients, to examine associations of AD with comorbid diagnoses, and to test the incremental validity of AD over comorbidity in predicting functional impairment and severity of anxiety and depression symptoms. The sample was 237 outpatients diagnosed with major depressive disorder (MDD) or persistent depressive disorder (PDD), with and without AD, using the Anxiety and Related Disorders Interview Schedule for DSM-5. Outpatients also completed self-report questionnaires assessing functional impairment and anxiety, stress, and depression symptom severity.

Prevalence and predictors of hair pulling disorder and excoriation disorder in Tourette syndrome.

Trichotillomania/hair pulling disorder (HPD) and excoriation/skin picking disorder (SPD) are childhood-onset, body-focused repetitive behaviors that are thought to share genetic susceptibility and underlying pathophysiology with obsessive-compulsive disorder (OCD) and Tourette syndrome (TS). We sought to determine the prevalence of DSM-5 HPD and SPD in TS patients, and to identify clinical factors most associated with their co-morbidity with TS. Participants included 811 TS patients recruited from TS specialty clinics for a multi-center genetic study.

Predictors of comorbid eating disorders and association with other obsessive-compulsive spectrum disorders in trichotillomania.

Trichotillomania (TTM) and eating disorders (ED) share many phenomenological similarities, including ritualized compulsive behaviors. Given this, and that comorbid EDs may represent additional functional burden to hair pullers, we sought to identify factors that predict diagnosis of an ED in a TTM population. Subjects included 555 adult females (age range 18-65) with DSM-IV-TR TTM or chronic hair pullers recruited from multiple sites.

Predictors of comorbid obsessive-compulsive disorder and skin-picking disorder in trichotillomania.

Background: Trichotillomania (TTM), obsessive-compulsive disorder (OCD), and skin-picking disorder (SPD) frequently occur together and share overlapping phenomenology, pathophysiology, and possible genetic underpinnings. This study sought to identify factors that predict OCD and SPD in hair pullers.

Methods: Five hundred fifty-five adult female hair pullers were recruited from specialty clinics and assessed using standardized, semi-structured interviews and self-reports.

Sex differences in trichotillomania.

Background: Trichotillomania (TTM) appears to be a fairly common disorder, yet little is known about sex differences in its clinical presentation. Long thought to be a primarily female disorder, males with TTM may have unique clinical presentations.

Methods: Participants with TTM (N = 462) were examined on a variety of clinical measures including symptom severity, functioning, and psychiatric comorbidity.

A comparison of clinical vs subclinical skin pickers in Israel.

Background: Skin-picking disorder (SPD) was recognized as its own entity for the first time in DSM-5. The existing SPD literature is limited and, to date, no study has examined the differences between clinical and sub- clinical SPD. Identifying differences between these 2 groups may improve diagnostic accuracy, treatment, and prevention efforts.

NEO-FFI personality clusters in trichotillomania.

The purpose of this study was to determine whether personality prototypes exist among hair pullers and if these groups differ in hair pulling (HP) characteristics, clinical correlates, and quality of life. 164 adult hair pullers completed the NEO-Five Factor Inventory (NEO-FFI; Costa and McCrae, 1992) and self-report measures of HP severity, HP style, affective state, and quality of life. A latent class cluster analysis using NEO-FFI scores was performed to separate participants into clusters.

Trichotillomania and personality traits from the five-factor model.

Objective: To examine whether personality traits have predictive validity for trichotillomania (TTM) diagnosis, pulling severity and control, and hair pulling style.

Methods: In study 1, logistic regression was used with TTM cases (n=54) and controls (n=25) to determine if NEO Five-Factor Inventory (NEO-FFI) personality domains predicted TTM case vs. control classification.

Replication study of the milwaukee inventory for subtypes of trichotillomania-adult version in a clinically characterized sample.

In the present study, we evaluated the Milwaukee Inventory for Subtypes of Trichotillomania-Adult Version (MIST-A) in a replication sample of clinically characterized hair pullers using exploratory factor analysis (EFA; N = 193). EFA eigenvalues and visual inspection of our scree plot revealed a two-factor solution. Factor structure coefficients and internal consistencies suggested a 13-item scale with an 8-item "Intention" scale and a 5-item "Emotion" scale.

Getting the word out: cognitive-behavioral therapy for trichotillomania (hair-pulling disorder) and excoriation (skin-picking) disorder.

Background: To date, there has been no investigation of dissemination outcomes for cognitive-behavioral training programs for body-focused repetitive behaviors (BFRBs).

Methods: Sixty-three past participants of the Trichotillomania Learning Center (TLC) intensive professional training institutes completed an online survey assessing referral sources, skills utilization, and treatment outcomes before and after training. The intensive training focused on the treatment of trichotillomania (hair-pulling) disorder and excoriation (skin-picking) disorder using in-person or videotaped didactics, role playing, and case presentations with supervision upon request.

Predictors of life disability in trichotillomania.

Background: Limited research has investigated disability and functional impairment in trichotillomania (TTM) subjects. This study examined the relationships between hair pulling (HP) style and severity and disability while controlling for mood severity. Disability was measured in individual life areas (work, social, and family/home life) instead of as a total disability score as in previous studies.

Body esteem in adolescent hair pullers.

Background And Aims: Trichotillomania (TTM) often first presents in adolescence, a developmental period marked by vulnerability in body image. To date, no one has studied the relationship between this disorder and body esteem.

Methods: 49 adolescents with DSM-IV TTM or chronic hair pulling (HP) and 23 control adolescents were administered diagnostic assessments and self-report measures of hair pulling and body esteem.

The relationship between hair pulling style and quality of life.

Background: Past research has found different associations between hair pulling (HP) variables and quality of life (QOL), especially after controlling for depression. This study examined HP styles (automatic vs focused) for their associations with QOL and whether depression accounted for these relationships.

Methods: Our sample consisted of 187 adults who met DSM-IV diagnostic criteria for trichotillomania (TTM) or chronic HP (TTM criteria except B and/or C).