Documentary to Encourage Plant-based Eating

Eating Behavior Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04507087
• Other study ID #: eatingveg
• Status: Completed
• Phase: N/A
• Start date: August 26, 2020
• Est. completion date: December 31, 2020

Study information

• Verified date: March 2021
• Source: Stanford University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

Description:

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

Recruitment information / eligibility

• Status: Completed
• Enrollment: 650
• Est. completion date: December 31, 2020
• Est. primary completion date: September 7, 2020
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

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

Related Conditions & MeSH terms

• Eating Behavior

Intervention

Behavioral:
• Documentary
A 20-minute documentary about the health, environmental, and animal welfare consequences of eating meat and animal products
• Control
A 20-minute unrelated video (a motivational talk entitled "Listening to shame")

Locations

Country	Name	City	State
United States	Maya Mathur	Palo Alto	California

Sponsors (1)

Lead Sponsor	Collaborator
Stanford University

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Perceived importance of health	A single Likert item adapted from Heckler (2010), ranging from 1 to 6, with higher scores representing greater perceived importance. The exact text is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Other	Perceived importance of environmental sustainability	A single Likert item adapted from Heckler (2010), ranging from 1 to 6, with higher scores representing greater perceived importance. The exact text is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Other	Perceived importance of animal welfare	A single Likert item adapted from Heckler (2010), ranging from 1 to 6, with higher scores representing greater perceived importance. The exact text is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Other	Speciesism	Caviola et al.'s (2019) Speciesism Scale, consisting of 6 Likert items each ranging from 1 to 7. After reverse-coding, a higher score on the sum of the items (ranging from 6 to 42) represents greater speciesism. The exact text for all items is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Other	Interest in animal welfare activism and reform	2 items modified from Corning et al.'s (2002) Activism Orientation Scale as well as 3 novel items, consisting in total of 5 items each ranging from 1 to 7. A higher score on the sum of the items (ranging from 5 to 35) represents greater interest in activism and reform. The exact text for all items is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Other	Social dominance orientation	Ho et al.'s (2015) 8-item Social Dominance Orientation [SDO(7)] scale, consisting in total of 5 items each ranging from 1 to 7. After reverse-coding, a higher score on the sum of the items (ranging from 8 to 56) represents greater interest in activism and reform. The exact text for all items is provided in detailed preregistration: https://osf.io/xrckh/registrations.	2 weeks after baseline data collection
Primary	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	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
Secondary	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
Secondary	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
Secondary	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

External Links

•   Detailed preregistration
•   Future location of data, code, and materials