Sex and intelligence quotient differences in age of diagnosis among youth with attention-deficit hyperactivity disorder.

Objectives: Attention-deficit/hyperactivity disorder (ADHD) is the most common neurodevelopmental condition and is characterized by inattention, hyperactivity, and impulsivity. Research suggests that some populations, such as females and individuals with high intelligence quotients may be a risk for late ADHD diagnosis and subsequent treatment. Our goal is to advance our understanding of ADHD diagnosis, by examining (1) how child sex and cognitive abilities together are related to the age of diagnosis and (2) whether symptom presentation, current internalizing and externalizing symptoms, and demographic factors are related to age of diagnosis.

Examining neural responses to anticipating or receiving monetary rewards and the development of binge eating in youth. A registered report using data from the Adolescent Brain Cognitive Development (ABCD) study.

Binge eating is characterized as eating a large amount of food and feeling a loss of control while eating. However, the neurobiological mechanisms associated with the onset and maintenance of binge eating are largely unknown. Recent neuroimaging work has suggested that increased responsivity within reward regions of the brain to the anticipation or receipt of rewards is related to binge eating; however, limited longitudinal data has precluded understanding of the role of reward responsivity in the development of binge eating.

Examining the placement of atypical anorexia nervosa in the eating disorder diagnostic hierarchy relative to bulimia nervosa and binge-eating disorder.

Objective: Some individuals meet the criteria for atypical anorexia nervosa and another eating disorder simultaneously. The current study evaluated whether allowing a diagnosis of atypical anorexia nervosa to supersede a diagnosis of bulimia nervosa (BN) or binge-eating disorder (BED) provided additional information on psychological functioning.

Methods: Archival data from 650 university students (87.

Functions of disordered eating behaviors: a qualitative analysis of the lived experience and clinician perspectives.

Background: One method to improve treatment outcomes for individuals with eating disorders (EDs) may be understanding and targeting individuals' motives for engaging in DE behaviors-or the functions of DE behaviors. The goal of this study was to investigate and categorize the various functions of DE behaviors from the perspectives of adults who engage in DE behaviors and clinicians who treat EDs.

Methods: Individuals who engage in DE behaviors (n = 16) and clinicians who treat EDs (n = 14) were interviewed, and a thematic analysis was conducted to determine key functions of DE behaviors.

Longitudinal associations between weight stigma and disordered eating across the weight spectrum.

Weight stigma reflects discrimination or stereotyping based on weight, and this construct is associated with body dissatisfaction, low self-esteem, and eating pathology. Recent research suggests that internalizing weight stigma (i.e.

#BoPo: Does viewing body positive TikTok content improve body satisfaction and mood?

Body positivity - often referenced on social media as "#BoPo" - encourages acceptance towards all body types, including one's own body, and challenges the societal ideal of the very thin body. The current study examined whether viewing body-positive TikTok content improves state mood and body satisfaction. Participants were female undergraduate students (N = 156) who completed an online study where they were randomly assigned to view either body-positive, body-focused, or control TikTok videos for five minutes.

The role of negative evaluation fears on associations between societal appearance pressures and disordered eating in university students.

Previous research demonstrates that sociocultural appearance pressures and internalization of appearance ideals lead to disordered eating (DE); however, only a subset of individuals exposed to these influences develop clinically significant DE. Identifying moderators of these associations may increase efficacy of targeted preventions for eating disorders. This study investigated whether the fear of negative evaluation (FNE) moderates these associations.

Does suppressing weight improve body satisfaction? A longitudinal analysis in undergraduate men and women.

Young adults with high body dissatisfaction may engage in disordered eating to reduce their weight, believing that weight loss will improve body satisfaction. Yet, limited research has examined whether suppressing weight contributes to improved body satisfaction in nonclinical samples. Undergraduate students (N = 661; 81.

A mechanistic staging model of reward processing alterations in individuals with binge-type eating disorders.

Altered reward processing is thought to characterize binge-type eating disorders, but the exact nature of these alterations is unclear. A more fine-grained understanding of whether specific aspects of reward processing contribute to the development or maintenance of binge eating may point to new therapeutic targets and personalized treatments. The incentive sensitization theory of addiction proposes that repeated use of a substance increases the desire to approach a reward ('wanting') but not pleasure when consuming the reward ('liking'), suggesting that reward processes driving addiction change over time.

Associations between emotion reactivity and eating disorder symptoms in a transdiagnostic treatment-seeking sample.

Objective: Individuals with eating disorders (EDs) demonstrate difficulties with emotion regulation, and these difficulties have been associated with severity and maintenance of ED symptoms. Although emotion reactivity (i.e.

Psychometric properties of the Farsi version of the Eating Pathology Symptoms Inventory (F-EPSI) among Iranian University men and women.

Background: Limited research has validated eating pathology assessments in Iranian men and women. The purpose of the current study was to translate and validate a Farsi version of the Eating Pathology Symptoms Inventory (F-EPSI) in Iranian university students.

Methods: Men (n = 279) and women (n = 486) completed questionnaires including the F-EPSI.

How Different Are Threshold and Other Specified Feeding and Eating Disorders? Comparing Severity and Treatment Outcome.

Background: Other Specified Feeding and Eating Disorders (OSFED) are characterized by less frequent symptoms or symptoms that do not meet full criteria for another eating disorder. Despite its high prevalence, limited research has examined differences in severity and treatment outcome among patients with OSFED compared to threshold EDs [Anorexia Nervosa (AN), Bulimia Nervosa (BN), and Binge Eating Disorder (BED)]. The purpose of the current study was to examine differences in clinical presentation and treatment outcome between a heterogenous group of patients with OSFED or threshold EDs.

Reliability and validity of a transdiagnostic measure of reward valuation effort.

To identify biobehavioral mechanisms underlying excessive reward consumption, reward valuation-effort (RV-E) assessments should (a) parallel measures in basic science to permit translation from preclinical to clinical studies; (b) quantify constructs dimensionally from healthy to disease states; and (c) hold relevance across different diagnostic categories. To address these aims, we developed a progressive ratio (PR) task whereby RV-E is measured as breakpoint when participants worked for access to playing a game. We evaluated test-retest reliability of breakpoint and convergent and discriminant validity of interpretations of this score against an established PR task for food.

Weight misperception and its associations with eating disorder symptoms over the course of residential eating disorder treatment.

Objective: Although individuals with eating disorders (EDs) often experience significant body dissatisfaction and perceptual body image distortions, the presence and impact of weight misperception in clinical samples have been minimally examined. The aims of this study were to quantify weight misperception in individuals with EDs, examine whether weight misperception predicts ED severity at treatment discharge, and explore changes in weight misperception across treatment.

Method: Participants were 98 women seeking residential treatment for their ED who reported weekly on their perceived weight.

The validation of a Farsi version of the Clinical Impairment Assessment (F-CIA) among Iranian adolescent boys and girls.

Purpose: Although some studies have been conducted to examine general psychosocial impairment in Iran, there is no research to date on clinical impairment secondary to disordered eating in Iranian adolescents. The purpose of this study was to evaluate the Farsi version of the Clinical Impairment Assessment (F-CIA) among Iranian adolescents.

Methods: A total of 1112 adolescents (age = 15.

The validation of a Farsi version of the Loss of Control over Eating Scale (F-LOCES) among Iranian adolescent boys and girls.

Objective: Few studies have been conducted on disordered eating in Iran, with limited research on loss of control (LOC) eating in adolescents. The purpose of the current study was to evaluate the validation of a Farsi version of the Loss of Control over Eating Scale (F-LOCES) among Iranian adolescents.

Method: Participants were 504 boys (Age  = 15.

The association between leptin and weight maintenance outcome in anorexia nervosa.

Objective: Relapse after weight restoration in anorexia nervosa (AN) is a critical problem. Higher body fat percentage after weight gain has been shown to predict better weight maintenance outcome. Leptin, a fat-derived hormone, has been associated with progress during weight gain, but its association with weight maintenance is unknown.

Mixture Modeling to Characterize Anorexia Nervosa: Integrating Personality and Eating Disorder Psychopathology.

Efforts to examine alternative classifications (e.g., personality) of anorexia nervosa (AN) using empirical techniques are crucial to elucidate diverse symptom presentations, personality traits, and psychiatric comorbidities.

Examining weight suppression as a transdiagnostic factor influencing illness trajectory in bulimic eating disorders.

Recent research indicates that weight suppression (WS: defined as the difference between highest lifetime and current weight) prospectively predicts illness trajectory across eating disorders characterized by binge eating, including AN binge-purge subtype (ANbp), bulimia nervosa (BN), and binge eating disorder (BED), collectively referred to as bulimic eating disorders. Through a series of studies, we have developed a model to explain the link between WS and illness trajectory in bulimic eating disorders. Our model posits that WS contributes to reduced circulating leptin, which leads to reduced postprandial glucagon-like peptide 1 (GLP-1) response.