Clinical trial NCT06598111: Increasing Motivation to Reduce Restriction
Official title: Amplifying Consequences to Reduce Dietary Restriction: a Proof-of-Concept Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Restrictive Eating
Keywords: online
experiment
restrictive eating
motivation
Lead sponsor: Florida State University
Sponsor class: OTHER
First posted: 2024-09-19
Enrollment: 126
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: 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:

* Does imagining a future without restrictive eating increase motivation to reduce restrictive eating?
* Does imagining a future without restrictive eating reduce actual restrictive eating behavior?
* Is it more motivating to think about long-term benefits of reducing dietary restriction, or to focus on short-term consequences of dietary restriction?

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:

* Complete daily measures of eating disorder symptoms and motivation for 7 days
* Write a narrative describing a day in the future without restrictive eating and read this narrative aloud daily for 7 days
* Be presented with information regarding the negative consequences of dietary restriction daily for 7 days

Detailed description: 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 \&amp; 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:

* Amplified Benefits and Consequences condition: Participants are prompted to 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, 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 to amplify the negative consequences of restrictive eating. Next, they read a brief informational blurb about the negative health consequences of restrictive eating.
* Amplified Benefits condition: Participants receive the same narrative prompt and recording instructions as participants in the Amplified Benefits \&amp; Consequences condition. They are not asked to complete the modified PCAN or presented with blurbs about the consequences of restrictive eating.
* Amplified Consequences condition: Participants in the Amplified Consequences condition are not prompted to write or record a narrative. After completing daily surveys, they complete the modified PCAN and are presented with blurbs about the consequences of restrictive eating.
* Control condition: Participants write a brief narrative nearly identical Amplified Benefits manipulation; however, their prompt instead asks them to consider a future free of concern about finances. Participants type their narrative and record themselves reading it aloud. Each day, participants create a new recording. Participants in the control condition do not complete the modified PCAN and are not provided with informational blurbs.

Eligibility criteria: Inclusion Criteria:

* At least 18 years of age
* Undergraduate student
* Fluent in English
* Engaging in dietary restriction

Exclusion Criteria:

* Engaging in binge eating
* Unable to consent
* Not yet an adult
* Currently pregnant
* Prisoner status

Primary outcomes:
measure: Change in dietary restraint
timeFrame: Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6
measure: Change in motivation
timeFrame: Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6
Secondary outcomes:
measure: Change in body dissatisfaction
timeFrame: Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6
measure: Change in shape/weight overvaluation
timeFrame: Baseline (day 0), day 1, day 2, day 3 day 4, day 5, day 6
Other outcomes:
Locations:
city: Tallahassee
country: United States
facility: Florida State University
state: Florida
Study officials:
References: