📄 social science

Impulsivity and Trait Anger as Predictors of Binge-Eating Disorder Symptom Intensity in Adult Women

This study of 225 adult women with binge-eating disorder reveals that while trait anger and impulsivity are significant predictors of symptom intensity, their weak associations suggest they represent only one component of a more complex psychopathological mechanism.

Original authors: Karolina Lewandowska, Waldemar Klinkosz, Wojciech Styk, Justyna Iskra

Published 2026-09-14

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CC BY 4.0

Original authors: Karolina Lewandowska, Waldemar Klinkosz, Wojciech Styk, Justyna Iskra

Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ✨ This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer

For many people, the struggle with food is not just about hunger or diet, but about a loss of control. Binge-eating disorder is a condition where individuals consume large amounts of food in a short time, feeling unable to stop, yet without the subsequent attempts to purge or compensate that characterize other eating disorders. This experience creates deep psychological distress and often traps a person in a cycle where negative emotions trigger overeating, which in turn fuels more negative feelings. Scientists have long suspected that two specific human traits might fuel this cycle: the inability to pause before acting, known as impulsivity, and the difficulty in managing anger. While these links have been studied in other eating disorders, the specific role they play in binge-eating disorder has remained less clear, leaving clinicians with an incomplete picture of how to help those suffering from it.

To fill this gap, a team of researchers in Poland set out to examine the relationship between these traits and the severity of binge-eating symptoms in adult women. They recruited 225 women, aged between 25 and 50, who all met the strict diagnostic criteria for binge-eating disorder. The participants were not in a clinical trial but were drawn from online support communities, where they completed a series of questionnaires. These surveys asked them to rate the intensity of their binge-eating symptoms over the past month and to describe their personality traits, specifically focusing on how often they feel angry, how they express that anger, and how easily they act on impulse when emotions run high. The researchers grouped the women based on how severe their symptoms were, creating three distinct categories: those with mild symptoms, those with moderate symptoms, and those with severe symptoms.

The results revealed a clear pattern, though the connections were not overwhelming. Women who reported the most severe binge-eating symptoms also tended to report higher levels of a general tendency to feel angry, known as trait anger. They were more likely to act impulsively, especially when experiencing strong negative or positive emotions. Crucially, these women also showed a greater difficulty in controlling their anger, both by holding it inside and by expressing it outwardly. When the researchers compared the groups, the women with severe symptoms had significantly higher scores for anger and impulsivity than those with mild symptoms. The data showed that as the intensity of the eating disorder symptoms increased, so did the levels of these difficult emotional traits.

However, the study also clarified the limits of these findings. While anger and impulsivity were linked to the severity of the disorder, they explained only a portion of the picture. The statistical analysis indicated that these two factors together accounted for just 13 percent of the differences in symptom intensity among the women. This suggests that while a tendency toward anger and a lack of impulse control are important pieces of the puzzle, they are not the whole story. The disorder is complex, involving many other psychological and biological factors that this study did not measure. The researchers noted that their findings were based on a single point in time, meaning they could show that these traits exist together but could not prove that one causes the other.

Despite these limitations, the study offers a valuable direction for future understanding and treatment. It confirms that for many women with binge-eating disorder, the struggle is deeply tied to how they experience and manage anger and impulses. The findings suggest that clinical approaches might benefit from focusing not just on food, but on helping patients develop better skills for recognizing, tolerating, and expressing anger in healthy ways. By addressing these emotional undercurrents, therapists may be able to help patients break the cycle of distress and loss of control that defines the disorder, even if anger and impulsivity are only one part of a much larger, intricate mechanism.

Technical Summary: Impulsivity and Trait Anger as Predictors of Binge-Eating Disorder Symptom Intensity in Adult Women

Problem Statement
While existing literature establishes links between impulsivity, anger, and eating disorders generally, research has predominantly focused on bulimia nervosa (BN) or eating disorders as a broad category. Consequently, the specific associations between impulsivity, trait anger, and binge-eating disorder (BED) symptom intensity remain underexplored. Although impulsivity is recognized as a key factor in the onset and maintenance of binge eating, and anger is known to be elevated in individuals with eating disorders, the extent to which these variables predict the intensity of BED symptoms in adult women is not well-defined. This study addresses this gap by investigating the relationships between BED symptom intensity, trait anger, anger expression/control, and various dimensions of impulsivity.

Methodology
The study employed a cross-sectional design involving 225 adult women aged 25–50 years ( $M = 33.22$ ). Participants were recruited from Polish online support communities (e.g., Facebook, Instagram, Overeaters Anonymous) and screened to ensure they met DSM-5-TR diagnostic criteria for BED. Exclusion criteria included the presence of compensatory behaviors, current pharmacological or psychotherapeutic treatment for BED, and diagnoses of schizophrenia or bipolar disorder.

Data collection utilized three primary instruments:

BED Symptom Scale: An author-developed, self-report instrument based on DSM-5-TR criteria, assessing symptom intensity over the previous month on a 4-point scale (1 = mild to 4 = very severe).
State–Trait Anger Expression Inventory-2 (STAXI-2): Used to measure Trait Anger, Anger Expression-In, Anger Expression-Out, Anger Control-In, and Anger Control-Out.
Short UPPS-P Impulsive Behavior Scale (S-UPPS-P): Assessed five impulsivity dimensions: Negative Urgency, Positive Urgency, Lack of Premeditation, Lack of Perseverance, and Sensation Seeking.

Statistical analysis included descriptive statistics, Spearman's rank-order correlation, one-way ANOVA with Tukey's post hoc tests, and k-means cluster analysis to stratify participants into low, moderate, and high-intensity BED groups. A linear regression model was subsequently tested to determine the predictive power of impulsivity and trait anger on BED symptom intensity.

Key Results

Correlations: BED symptom intensity demonstrated weak but significant positive correlations with Trait Anger ( $\rho = .29$ ), Anger Expression-Out ( $\rho = .17$ ), general Impulsivity ( $\rho = .25$ ), Positive Urgency ( $\rho = .18$ ), and Negative Urgency ( $\rho = .13$ ). Conversely, significant negative correlations were found with Anger Control-Out ( $\rho = -.28$ ) and Anger Control-In ( $\rho = -.22$ ).
Group Differences: Cluster analysis identified three distinct groups based on symptom intensity (Mild, Moderate, Severe). Post hoc comparisons revealed that the Severe group differed significantly from the Mild group across nearly all anger and impulsivity variables. Specifically, the Severe group exhibited higher Trait Anger and Anger Expression-Out, lower Anger Control (both In and Out), and higher levels of general Impulsivity, Negative Urgency, and Positive Urgency compared to the Mild group.
Predictive Modeling: A linear regression model including Trait Anger and Impulsivity as predictors explained 13% of the variance in BED symptom intensity ( $F(2, 222) = 16.32, p < .001$ ). Both Trait Anger ( $\beta = .33, p < .001$ ) and Impulsivity ( $\beta = .20, p = .002$ ) emerged as significant independent predictors.

Key Contributions
This study contributes to the limited literature specifically examining the interplay of anger and impulsivity within the context of BED, distinct from BN. It provides empirical evidence that:

Higher levels of trait anger and general impulsivity are associated with greater BED symptom intensity in adult women.
Difficulties in controlling anger (both inward and outward) are negatively correlated with symptom severity.
Both negative and positive urgency (the tendency to act rashly under strong negative or positive emotions) are associated with symptom intensity, suggesting that binge eating may serve both as a mechanism for reducing negative affect and as a reward-seeking behavior.
Trait anger and impulsivity function as significant, albeit modest, predictors of symptom severity, supporting the multifactorial nature of BED psychopathology.

Significance and Claims
The authors claim that these findings highlight the potential role of impulsivity and anger-related processes in understanding differences in BED symptom severity. The study suggests that while these variables are meaningful correlates, they represent only one part of a complex psychopathological mechanism, as evidenced by the modest effect sizes and the fact that the regression model explained only 13% of the variance.

The paper posits that these findings support the consideration of anger regulation and impulsivity management in future research and clinical interventions. Specifically, the authors suggest that interventions aimed at strengthening skills in recognizing, tolerating, and adaptively expressing anger may be beneficial, particularly for patients with a pronounced impulsive-affective profile. However, the authors explicitly state that their conclusions are modest; they do not claim that anger and impulsivity are the sole drivers of BED, but rather that they are relevant factors within a broader, multifactorial framework. The study also notes limitations, including the cross-sectional design (precluding causal inference), the exclusion of male participants, and the use of a non-standardized BED symptom scale, urging caution in generalizing the results and calling for longitudinal studies and standardized assessment tools in future work.

Technical Summary: Impulsivity and Trait Anger as Predictors of Binge-Eating Disorder Symptom Intensity in Adult Women

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