Visceral sensitivity, hunger responsiveness, and satiety responsiveness: Associations between facets of gastrointestinal interoception and disordered eating profiles in an undergraduate sample.

This preregistered study examined associations between empirically derived profiles of disordered eating in a diverse nonclinical sample and three facets of gastrointestinal (GI) interoception (visceral sensitivity, hunger responsiveness, satiety responsiveness). University students (n = 591; 53.3% women; 23.0% Hispanic) completed the Visceral Sensitivity Index, Adult Eating Behavior Questionnaire, and Eating Pathology Symptom Inventory. Latent profile analysis was conducted in Mplus v8.3 with four behavioral indicators (restricting, binge eating, excessive exercise, purging [binary]). Facets of GI interoception predicting odds of disordered eating profile membership compared to an asymptomatic group were evaluated. Five profiles were identified. Facets of GI interoception differentially predicted odds of membership in disordered eating profiles. However, higher scores on all three facets of GI interoception were associated with increased odds of membership in a high disordered eating profile. The relationship between distinct facets of GI interoception and specific disordered eating patterns appears nuanced, though individuals displaying a range of disordered eating behaviors may exhibit broad GI interoceptive dysfunction. Findings are consistent with the recent emphasis on idiographic treatment approaches for disordered eating and may have implications for screening among university students. Prospective longitudinal work and extension to clinical samples is needed.

Examination of the two-step water load test as a measure of gastric interoception and associations with eating and weight/shape concerns in a nonclinical sample.

OBJECTIVE: The current study extended research examining the validity of the two-step Water Load Test (WLT-II), an objective, laboratory-based measure of gastric interoception, by investigating the validity of the WLT-II in a nonclinical sample and testing its contribution to the prediction of eating and weight/shape concerns. METHODS: Participants (n = 129, 73.6% cisgender female, M = 20.13 years old) completed the WLT-II Questionnaire and two-step WLT-II, as well as self-report measures of eating and weight/shape concerns (Eating Disorder Examination Questionnaire; EDE-Q) and interoception (Multidimensional Assessment of Interoceptive Awareness-2; Intuitive Eating Scale-2 Reliance on Hunger and Satiety), in the lab at a large southeastern university. Data analysis included repeated measures ANOVA, correlations, and a series of hierarchical linear regressions. RESULTS: Participants reported considerably more discomfort after the "maximum fullness" trial compared to the "satiation" trial. The WLT-II's objective measure of gastric interoception (sat_%) was not significantly correlated with the self-report measures of interoception and did not predict EDE-Q Dietary Restraint, Eating Shame, or Weight/Shape Concerns. Unexpectedly, greater gastric sensitivity was associated with less EDE-Q Preoccupation/Restriction. Exploratory analyses suggested a possible nonlinear association. DISCUSSION: These results support the validity of the WLT-II in its ability to create, measure, and distinguish between the states of satiation and maximum fullness. However, results also suggest additional work is needed to better understand what the WLT-II's sat_% measure is capturing, as well as investigate potential nonlinear associations of the WLT-II with disordered eating. PUBLIC SIGNIFICANCE: Interoception, or the processing of internal body signals, shows important links to disordered eating. Despite the clear relevance of gastric interoception to disordered eating-such as the ability to detect satiety signals-existing research has relied on general, self-report measures of interoception. This study examined the utility of a laboratory-based measure of gastric interoception. Results suggested mixed support for its validity and utility for predicting eating and weight/shape concerns in a nonclinical population.

Women's disordered eating and sexual function: the role of interoception.

BACKGROUND: Among women, disordered eating and sexual difficulties commonly co-occur. AIM: We investigated whether interoceptive dysfunction (ie, altered processing of body cues) may be a common cause (ie, third variable) contributing to these concomitant outcomes above and beyond body mass index (BMI) and body image concerns. METHODS: Women (n = 1201; mean age = 25.92 years; mean BMI = 25.46 kg/m2; 61.6% heterosexual, 27.5% bisexual) were recruited from sexual education courses at a midsize southeastern university and Reddit communities related to women's health, sex, and disordered eating. Participants completed online measures of self-reported interoception (Multidimensional Assessment of Interoceptive Awareness Version 2), disordered eating attitudes and behaviors (Eating Disorder Examination Questionnaire), sexual function (Female Sexual Function Index), and demographic information, including height and weight. Regression, commonality, and dominance analyses were completed in R. OUTCOMES: Sexual function was assessed via the Female Sexual Function Index. RESULTS: Both general interoception and body trust (a facet of interoception concerned with trust of internal sensations) predicted dietary restraint and sexual function (Ps < .001). After accounting for both general interoception (ß = 0.27, P < .001) and body trust (ß = 0.32, P < .001) in hierarchal regression models predicting sexual function, dietary restraint either evidenced a reduction in its standardized beta or was no longer associated with sexual function. Body image concerns also emerged as a robust predictor of women's sexual function. Body trust accounted for the most unique variance (4.45%) in women's sexual function and commonly accounted for another 3.70% of variance with body image concerns. CLINICAL IMPLICATIONS: Interoceptive exposure interventions may contribute to better outcomes for women with disordered eating, sexual difficulties, or co-occurring concerns, a notion worthy of future investigation. STRENGTHS AND LIMITATIONS: Strengths include a large diverse sample in terms of sexual orientation (>35% sexual minority) and body size (BMIs from underweight to class 3 obesity). The cross-sectional nature of this study precludes any conclusions regarding temporal precedence or causality. Future studies should use different measures of dietary restraint for nonclinical populations (eg, objective measures of caloric intake). CONCLUSION: Findings suggest that both interoception and body image concerns contribute to the co-occurrence of disordered eating behaviors and sexual difficulties, and that both may be important risk/maintaining factors to consider in future work. Interoception should be integrated into models of women's sexual function, as it may be just as important to women's sexual well-being as body image concerns.

The Roles of Body Image, Sexual Motives, and Distraction in Women's Sexual Pleasure.

Women with body image concerns are more likely to experience sexual difficulties (e.g., with arousal, lubrication, orgasm). However, the processes by which body image impacts sexual well-being are poorly understood. We theorized that women with negative body image are less likely to view sex in terms of reward, leading them to have weaker approach sexual motives (i.e., to pursue positive experiences such as pleasure). Rather, women with negative body image may have sex to avoid personal insecurities and negative emotions, leading them to have stronger avoidance sexual motives (i.e., to cope with negative affect or to avoid partner conflict). In turn, we theorized that stronger approach sexual motives may allow women to be more focused on erotic cues during sex, thereby enhancing sexual pleasure, whereas avoidance motives may lead to greater distraction, interfering with sexual pleasure. Women (N = 1619) were recruited from online venues and reported on their body image and most recent sex. We found that body dissatisfaction was associated with weaker self-focused approach motives and in turn more distraction. Additionally, body dissatisfaction was associated with stronger self- and partner-focused avoidance motives and in turn more distraction. In turn, more distraction was associated with less pleasure and worse sexual function. To the best of our knowledge, this is the first investigation of whether body image in women is associated with their sexual motives. Findings highlight the importance of sexual motives in explaining the link between body image and sexual pleasure and function.

General versus hunger/satiety-specific interoceptive sensibility in predicting disordered eating.

Dysfunctional interoceptive processing of hunger and satiety cues is particularly relevant to disordered eating behaviors. However, researchers often rely on general measures of interoceptive sensibility (IS1; self-reported experience of internal bodily cues) which conflate interoceptive processes across biological systems (e.g., gastric, cardiac) when assessing the role of interoception in disordered eating. Participants (N = 213; 50% female, age M = 20.77 years) were recruited from a large southeastern university for this online study and completed the Intuitive Eating Scale-2 (hunger/satiety-specific), the Multidimensional Assessment of Interoceptive Awareness-2 (general), and the Eating Disorder Inventory Interoceptive Awareness Subscale (general) as measures of IS. The Eating Pathology Symptoms Inventory was used to assess disordered eating attitudes and behaviors. Controlling for sex and body mass index, hunger/satiety-specific IS was associated with binge eating, purging, and cognitive restraint over and above general IS measures and emerged as the dominant predictor of each. Hunger/satiety-specific IS did not predict restricting behavior. Dysfunctional processing of hunger and satiety cues may be a particularly important risk factor to target in screenings and interventions for disordered eating. Findings highlight the importance of careful selection of IS measures in research and targeting hunger/satiety-specific IS in clinical interventions for disordered eating.

Roles of Genital Self-Image, Distraction, and Anxiety in Women's Sexual Pleasure: A Preregistered Study.

Women with negative genital self-image are more likely to experience sexual dysfunction , but the processes underlying this association are unknown. We theorized that this association is mediated by distraction from the arousing sexual cues that foster pleasure and orgasm . In a sample of 1,619 women who had sex in the previous four weeks, women with negative genital self-image were more likely to be distracted by self-critical concerns (i.e., appearance- and performance-based distraction and embarrassment) during sex, and in turn, experienced less sexual pleasure and worse sexual function. Additionally, this indirect effect via appearance-based distraction was strongest among women with trait-level anxiousness and social anxiety. We found a similar pattern of results when investigating the indirect effect of genital self-image on sexual function. Implications for understanding sexual function and therapeutic approaches are discussed.