Documentary to Encourage Plant-based Eating

Study Overview
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Brief Summary
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This study will assess whether watching a documentary video about the health, environmental, and ethical consequences of eating meat and animal products reduces participants' self-reported intake of these items.

Detailed Description
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See detailed preregistration: https://osf.io/xrckh/registrations

Official Title
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Randomized Controlled Trial of a Documentary to Encourage Plant-based Eating

Conditions
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Eating Behavior

Intervention / Treatment
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* Behavioral: Documentary
* Behavioral: Control


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Participant is currently located in the United States Participant is at least 18 years old Exclusion Criteria: Participant is located outside the United States Participant is less than 18 years old

Ages Eligible for Study
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Minimum Age: 18 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: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Intervention<br>See detailed preregistration: https://osf.io/xrckh/registrations | Behavioral: Documentary<br>* A 20-minute documentary about the health, environmental, and animal welfare consequences of eating meat and animal products<br>|
| Sham Comparator: Control<br>See detailed preregistration: https://osf.io/xrckh/registrations | Behavioral: Control<br>* A 20-minute unrelated video (a motivational talk entitled Listening to shame)<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total meat and animal product consumption | Self-reported meat and animal product consumption (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total meat consumption | Self-reported meat consumption (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | 
| Total animal product consumption | Self-reported animal product consumption (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | 
| Consumption of each of 8 individual categories of meats and animal products | Self-reported consumption (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | 
| Total consumption of selected, healthy plant-based foods (ounces consumed over the past week) | Self-reported consumption (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection |