Eating Disorder Diagnostic Scale – DSM-5 Version

Abstract

The Eating Disorder Diagnostic Scale – DSM-5 Version (EDDS – DSM-5 Version) is a comprehensive, self-administered screening and diagnostic instrument utilized in both research and clinical settings. Its primary function is to assess the presence and severity of core symptoms associated with eating disorders according to the criteria established in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). The scale specifically evaluates behavioral and cognitive features of Anorexia Nervosa, Bulimia Nervosa, and Binge Eating Disorder, focusing on symptoms experienced over the preceding three months.

The EDDS – DSM-5 Version efficiently captures the required frequency and qualitative characteristics of episodes of objective binge eating, subjective distress, and various compensatory behaviors, making it a powerful tool for rapidly determining diagnostic status and tracking treatment outcomes.

Keywords

Eating Disorder Diagnostic Scale, EDDS, DSM-5, Binge Eating Disorder, Bulimia Nervosa, Anorexia Nervosa, self-report, psychometrics, compensatory behaviors, body image dissatisfaction.

Authors

Eric Stice, Jennifer Fisher, Ulrike Martinez (Original EDDS development). The DSM-5 revision is generally attributed to Eric Stice and colleagues.

Purpose

The primary purpose of the EDDS – DSM-5 Version is to provide a standardized, reliable, and efficient method for classifying individuals according to the full spectrum of DSM-5 eating disorder diagnoses. It is designed to move beyond simple screening by assessing the specific frequency and co-occurrence of symptoms necessary to meet categorical diagnostic thresholds.

The instrument serves multiple functions, including initial population screening in large-scale epidemiological studies, detailed assessment of symptom severity in clinical settings, and monitoring changes in disordered eating behaviors over the course of intervention. The inclusion of demographic and physical measurements (weight, height) allows for calculation of Body Mass Index (BMI), which is critical for assessing the diagnostic criteria for Anorexia Nervosa.

Construct

The scale measures the complex psychological and behavioral construct known as disordered eating psychopathology, structured around key diagnostic criteria. These constructs include the core cognitive component of intense fear of weight gain and excessive influence of body shape/weight on self-evaluation.

Behaviorally, the EDDS assesses the frequency and characteristics of binge eating episodes (defined by loss of control) and the use of inappropriate compensatory behaviors aimed at preventing weight gain, such as self-induced vomiting, misuse of laxatives, fasting, and excessive exercise. The scale also integrates criteria related to the distress and functional impairment caused by these behaviors, fulfilling crucial requirements for a clinical diagnosis.

Validity

Research on the EDDS (and its earlier DSM-IV version) has consistently demonstrated strong psychometric properties, including high criterion validity. The scale shows robust ability to accurately classify individuals against gold-standard clinical interviews, such as the Eating Disorder Examination (EDE).

The scale exhibits high convergent validity, correlating strongly with other established self-report measures of eating disorder symptoms, such as the Eating Disorder Examination-Questionnaire (EDE-Q). Furthermore, the EDDS possesses excellent discriminant validity, effectively distinguishing between individuals with clinically significant eating disorders and those in non-clinical or control groups.

Reliability

The EDDS – DSM-5 Version demonstrates high levels of internal consistency across its various symptom domains. Cronbach’s alpha coefficients for the key subscales (e.g., Binge Eating Frequency, Compensatory Behavior Frequency) typically meet or exceed standard thresholds for research instruments, indicating that the items within each domain measure a coherent construct.

The instrument also exhibits acceptable test-retest reliability over short intervals, suggesting stability in the measurement of symptoms when clinical status remains unchanged. This reliability ensures that observed changes in scores over time are likely attributable to genuine changes in the patient’s psychopathology rather than measurement error.

Factor Analysis

Factor analytic studies of the EDDS typically support a multi-factor structure, aligning closely with the behavioral and cognitive distinctions made within the DSM framework. Common factors identified include a primary factor related to weight and shape concern, a factor encompassing objective and subjective binge eating episodes, and a third factor detailing specific compensatory behaviors (purging and non-purging methods). This factor structure confirms the scale’s ability to differentiate between the core symptom clusters of the various eating disorder diagnoses.

Instrument

Test Type: Self-report screening and diagnostic instrument.

Format: 23 items utilizing a combination of Likert scales (0-6 scale of severity), frequency counts (0-16+ per month), and binary (YES/NO) questions.

Language Available: English (Original).

Population Group: Clinical and non-clinical populations.

Age Group: Adolescents and Adults.

Population Details: The scale is widely used across various demographic groups, particularly in studies focusing on high-risk populations for eating disorders.

Test Methodology: Respondents are asked to reflect on their behaviors and feelings over the preceding three months to determine symptom frequency and severity.

Keywords

Psychological assessment, screening tool, objective binge, loss of control eating, fasting, purging, body weight, self-evaluation, clinical diagnosis.

Authors

Author ORCID Identifier: Not publicly provided for all authors.

Affiliation Email addresses: Contact information generally managed through the Oregon Research Institute (ORI).

Correspondence Address: Oregon Research Institute, 1715 Franklin Blvd., Eugene, OR 97403, USA.

Permissions & Fee and Test Year

The EDDS is often available for non-commercial research use, though specific permissions should be sought from the primary author or the distributing institution (Oregon Research Institute). Fees may apply for commercial or large-scale clinical implementation. The original EDDS was published in 2004 (based on DSM-IV criteria), and the subsequent DSM-5 version was developed following the manual’s release in 2013.

Reference’s

The foundational psychometric properties of the scale are detailed in the original publication:

• Stice, E., Fisher, J., & Martinez, U. (2004). The Eating Disorder Diagnostic Scale: Reliability and validity of a self-report measure of the DSM-IV eating disorders. Psychological Assessment, 16(1), 62–73.

• Information regarding this instrument, including updates and versions, is maintained by the Oregon Research Institute (ORI). The instrument can be found at: http://www.ori.org/sticemeasures/.

Items of the Eating Disorder Diagnostic Scale – DSM-5 Version

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.