The Effects of External Cues Versus Internal Cues Messaging on Heart Rate Variability and Affect

Study Overview
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Brief Summary
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This randomized controlled trial will assess the effects of External Cues focused messaging (i.e., government recommendations of MyPlate) compared to Internal Cues focused messaging (i.e., intuitive eating). The investigators will collect data on within-person changes in psychological (e.g. affect) and physiological (e.g. heart rate variability) outcomes in female college students. Participants will be randomly assigned to one of two study conditions. In condition one, participants will view a five-minute video focusing on traditional nutrition education principles. In condition two, participants will view a five-minute video focusing on intuitive eating principles.

Official Title
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The Effects of External Cues Versus Internal Cues Messaging on Heart Rate Variability and Affect

Conditions
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Dietetics, Diet, Healthy, Nutrition Therapy, Affect, Autonomic Nervous System

Intervention / Treatment
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* Other: Internal Cues Nutrition Messaging
* Other: External Cues Nutrition Messaging


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18-29 years old identify as female college student Exclusion Criteria: outside of the age range of 18-29 years do not self-identify as female not able to attend an in-person study visit at the University of Delaware

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 29 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Participants attend a single study visit and are randomized to view one of two nutrition education videos.
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Internal Cues Messaging<br>Participants will view a five-minute video focusing on intuitive eating principles. | Other: Internal Cues Nutrition Messaging<br>* Participants will view a 5 minute nutrition education video focused on intuitive eating principles.<br>|
| Active Comparator: External Cues Messaging<br>Participants will view a five-minute video focusing on traditional nutrition education principles. | Other: External Cues Nutrition Messaging<br>* Participants will view a 5 minute nutrition education video focused on traditional nutrition education principles such as label reading.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in Heart Rate Variability (HRV) | Heart rate variability measures the variation in time between each heartbeat. This will be measured using Firstbeat Electrocardiograms (ECGs) that participants will attach to their chest using two electrodes. | HRV will be measured during a 3-minute baseline period and while watching a 5-minute intervention video. | 
| Change in Affect | Affect will be assessed using the Positive and Negative Affect Schedule (PANAS), an instrument that asks participants to rank the extent to which they are feeling each of 20 different emotions on a scale of 1-5. The PANAS produces a score from 10-50 for each Positive Affect and Negative Affect, with higher scores indicating higher levels of these states. | The PANAS is administered before and immediately after viewing the video. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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nutrition messaging, nutrition education, Intuitive Eating