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The goal of this experiment is to learn how to effectively increase motivation to reduce dietary restriction among young adults engaging in clinically significant restrictive eating. The main questions this study aims to answer are:
Researchers will compare (1) amplifying the possible benefits of reducing restrictive eating, (2) amplifying the negative consequences of restrictive eating, or (3) both is more effective for increasing motivation to reduce dietary restriction over a one-week period.
Participants will:
This study tests whether amplifying the potential benefits of reducing dietary restriction and/or consequences of maintaining dietary restriction increases motivation to address disordered (i.e., restrictive) eating among college students. This is an online study with a between-groups experimental design which takes place over the course of one week. All study procedures are completed online.
Participants are randomized to one of four conditions: Amplified Benefits & Consequences, Amplified Benefits, Amplified Consequences, or a control condition. Baseline measures are completed on the first day of study enrollment, following randomization to experimental condition. Over the subsequent six days, participants receive daily surveys via email every 24 hours and are given 24 hours to complete each survey. In every condition, participants complete daily self-report measures. Depending on condition, participants also completed the following manipulations:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Amplified Benefits and Consequences | Experimental | On the first day of the study (day 0), participants in the Amplified Benefits & Consequences condition write a brief, detailed narrative describing a day in their future if they did not restrict their caloric intake and were not concerned about their body weight or shape. Participants type their responses and provide a recording of themselves reading their narrative aloud. On each subsequent day (day 1 through day 6), participants are provided with their written narrative and asked to create a new recording of themselves reading it aloud. After completing their recording and surveys, participants complete a modified version of the Pros and Cons of Anorexia Scale. |
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| Amplified Benefits | Experimental | On the first day of the study (day 0), participants in the Amplified Benefits condition write a brief, detailed narrative describing a day in their future if they did not restrict their caloric intake and were not concerned about their body weight or shape. Participants type their responses and provide a recording of themselves reading their narrative aloud. On each subsequent day (day 1 through day 6), participants are provided with their written narrative and asked to create a new recording of themselves reading it aloud. |
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| Amplified Consequences | Experimental | On each day of the study, participants in the Amplified Consequences condition complete the modified Pros and Cons of Anorexia scale and are presented with blurbs about the consequences of restrictive eating. |
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| Control |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Amplified Benefits | Other | Participants write a brief, detailed narrative describing a day in their future if they did not restrict their caloric intake and were not concerned about their body weight or shape. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in dietary restraint | Dietary restraint was measured using two items drawn from the Eating Disorder Examination Questionnaire. Each item was rated on a 1-6 scale ranging from 1 (Not at all/never) to 6 (Markedly/all the time). Scores on each item were averaged to create a single dietary restraint score. Changes in daily scores were used to quantify changes in dietary restraint over time. | Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6 |
| Change in motivation | Motivation was measured using the Readiness and Motivation Questionnaire, which is a self-report measure assessing motivation to change disordered attitudes and behaviors. Items reflect four categories: precontemplation, action, internality, and confidence. Respondents rate each item on a percentage scale ranging from zero to 100. The RMQ was modified to include only items assessing dietary restriction, with one item assessing each of the aforementioned categories. Items were anchored to the last 24 hours. Changes in daily scores were used to quantify changes in motivation over time. | Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6 |
| Measure | Description | Time Frame |
|---|---|---|
| Change in body dissatisfaction | Body dissatisfaction was measured using two items drawn from the Eating Disorder Examination Questionnaire. Each item was rated on a 1-6 scale ranging from 1 (Not at all/never) to 6 (Markedly/all the time). Scores on each item were averaged to create a single body dissatisfaction score. Changes in daily scores were used to quantify changes in body dissatisfaction over time. |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Florida State University | Tallahassee | Florida | 32304 | United States |
Protocol was not designed to allow for IPD sharing.
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| ICF | No | No | Yes | Informed Consent Form | Dec 14, 2023 | Sep 15, 2024 | ICF_000.pdf |
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| Placebo Comparator |
Participants in the control condition write a brief narrative considering a future free of concern about finances. As with the active conditions, participants type their narrative on day 0 and record themselves reading it aloud each day. |
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| Amplified Consequences | Other | Participants complete the Pros and Cons of Anorexia scale to amplify the consequences of restrictive eating. They are also presented with blurbs about the consequences of restrictive eating. |
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| Control | Other | Participants write a brief narrative considering a future free of concern about finances. |
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| Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6 |
| Change in shape/weight overvaluation | Shape/weight overvaluation was measured using three items drawn from the Eating Disorder Examination Questionnaire. Each item was rated on a 1-6 scale ranging from 1 (Not at all/never) to 6 (Markedly/all the time). Scores on each item were averaged to create a single shape/weight overvaluation score. Changes in daily scores were used to quantify changes in shape/weight overvaluation over time. | Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6 |