The Diet Self-Efficacy Scale (DIET-SE)

Abstract

The Diet Self Efficacy Scale (DIET-SE) is an 11-item, scenario-based measure designed to assess an individual’s confidence in resisting food temptations across various challenging dieting situations. Developed and validated by Stich, Knäuper, and Tint (2009), the scale is structured around three distinct factors: High Caloric Food Temptations (HCF), Social and Internal Factors (SIF), and Negative Emotional Events (NEE). The DIET-SE demonstrates strong psychometrics, offering researchers and clinicians a short, reliable, and valid tool for evaluating context-specific dieting self-efficacy.

Keywords

Dieting, Self-Efficacy, Eating Behavior, Food Temptation, Weight Management, High Caloric Food, Negative Emotional Events, Scenario-Based Assessment, Psychometrics

Authors

Knäuper, B., Stich, C., Tint, A.

Purpose

The primary purpose of the DIET-SE is to quantify an individual’s perceived ability to maintain dietary control when faced with specific high-risk situations that typically challenge adherence to a diet or weight management plan. Unlike general measures of self-efficacy, the DIET-SE utilizes a scenario-based format, requiring respondents to rate their confidence in overcoming concrete, realistic obstacles to healthy eating.

This assessment is crucial for identifying areas where an individual lacks confidence, allowing for targeted intervention strategies in clinical and research settings focused on obesity, disordered eating, or lifestyle modification programs.

Construct

The DIET-SE measures scenario-based dieting self-efficacy. Self-efficacy, as defined by Bandura, refers to one’s belief in one’s ability to succeed in specific situations or accomplish a task. In the context of the DIET-SE, the construct is operationalized by measuring the respondent’s confidence (on a 5-point scale) that they can resist eating high-caloric foods or overeating in situations involving specific environmental, social, or emotional triggers.

Validity

The DIET-SE has been reported as a short, reliable, and valid measure of dieting self-efficacy. Validity is supported primarily through its clear factor structure, which aligns theoretically with common challenges faced during dieting, such as resisting tempting foods or coping with emotional eating. The scale’s scenario-based format enhances its ecological validity, ensuring that the measured construct directly relates to real-world behavioral challenges.

Reliability

The reliability of the DIET-SE has been established through strong indices of both internal consistency and test-retest stability, as reported in Stich et al. (2009).

• Internal Consistency: The overall scale demonstrated high internal consistency, ranging from α = .82 to .87. Subscale consistency values were also acceptable: HCF ranged from α = .70 to .77; SIF ranged from α = .71 to .79; and NEE ranged from α = .75 to .79.
• Test-Retest Reliability: Stability over time was confirmed using a 2- to 3-week interval. The total DIET-SE scale yielded a strong test-retest correlation (rtt = .83). Subscale correlations further supported stability: HCF (rtt = .75), SIF (rtt = .77), and NEE (rtt = .80).

Factor Analysis

The Diet Self Efficacy Scale is composed of 11 items which load onto three empirically derived factors, identified through factor analysis. This structure allows for a nuanced understanding of specific self-efficacy deficits, rather than just a global score.

• Factor 1: High Caloric Food Temptations (HCF): This factor consists of four items focusing on situations where the presence of highly tempting, high-caloric food (e.g., cake, ice cream) presents a direct challenge to resistance.
• Factor 2: Social and Internal Factors (SIF): This factor includes four items describing situations where external social pressure (e.g., eating with friends, hosts) or internal physical states (e.g., feeling tired or hungry after work) make maintaining dietary discipline difficult.
• Factor 3: Negative Emotional Events (NEE): This factor comprises three items that address situations in which negative emotional states (e.g., anxiety, anger, or having an argument) trigger the desire to eat as a coping mechanism.

Instrument

Test Type: Self-Report Questionnaire; Scenario-Based Efficacy Scale

Format: 11 items, typically administered using a 5-point Likert-style scale measuring confidence (e.g., 1 = Not at all confident to 5 = Completely confident).

Language Available: English (Primary validation language)

Population Group: Adults engaged in or considering weight management or dieting behaviors.

Age Group: Adult (18+)

Population Details: Individuals concerned with controlling their weight or food intake, often those participating in clinical trials for obesity or behavioral interventions.

Test Methodology: Respondents are asked to imagine themselves in specific, challenging eating scenarios and rate their confidence in overcoming the temptation presented.

Keywords

Self-Efficacy, Diet, Eating Behavior, HCF, SIF, NEE, Behavioral Control, Psychometrics, Weight Loss, Temptation

Authors

Author ORCID Identifier: Not specified in source material.

Affiliation Email addresses: Not specified in source material.

Correspondence Address: Not specified in source material.

Permissions & Fee and Test Year

The primary validation and publication of the DIET-SE occurred in 2009. Researchers should consult the primary publication (Stich et al., 2009) or contact the lead author, B. Knäuper, for official permission regarding use, adaptation, and any associated fees. As a standardized academic scale, usage permissions typically depend on whether the application is academic or commercial.

Reference’s

Stich, C., Knäuper, B., & Tint, A. (2009). A scenario-based measure of dieting self-efficacy: The DIET-SE. Assessment, 16, 16-30.

Items of the The Diet Self Efficacy Scale (DIET-SE)

The following questions relate to situations and behaviors that can hinder weight loss or weight control. Please imagine yourself in each of the following situations and rate how confident you are that you could overcome them, using the 5-point scale below. Completely fill in the circle that best indicates how confident you feel that you could overcome the situation.

• 1. You are having dinner with your family and your favorite meal has been prepared. You finish the first helping and someone says, “Why don’t you have some moreHow confident are you that you would turn down a second helping
• 2. You often overeat at supper because you are tired and hungry when you get home. How confident are you that you would not overeat at supper?
• 3. There is a party at work for a coworker and someone offers you a piece of cake. How confident are you that you would turn it down?
• 4. You just had an upsetting argument with a family member. You are standing in front of the refrigerator and you feel like eating everything in sight. How confident are you that you would find some other way to make yourself feel better?
• 5. You are invited to someone’s house for dinner and your host is an excellent cook. You often overeat because the food tastes so good. How confident are you that you would not overeat as a dinner guest?
• 6. You finished your meal and you still feel hungry. There are cakes and fruits available. How confident are you that you would choose the fruits?
• 7. You are at a friend’s house and your friend offers you a delicious looking pastry. How confident are you that you would refuse this offer?
• 8. You are having a hard day at work and you are anxious and upset. You feel like getting a candy bar. How confident are you that you would find a more constructive way to calm down and cope with your feelings?
• 9. You feel like celebrating. You are going out with friends to a good restaurant. How confident are you that you would celebrate without overeating?
• 10. You are out with a friend at lunch time and your friend suggests that you stop and get some ice cream. How confident are you that you would resist the temptation?
• 11. You just had an argument with your boy- friend or girlfriend. You are upset, angry, and you feel like eating something. How confident are you that you would talk the situation over with someone or go for a walk instead of eating?