<clinical_study>
  <!-- This xml conforms to an XML Schema at:
    https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
  <required_header>
    <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
    <link_text>Link to the current ClinicalTrials.gov record.</link_text>
    <url>https://clinicaltrials.gov/ct2/show/NCT04507087</url>
  </required_header>
  <id_info>
    <org_study_id>eatingveg</org_study_id>
    <nct_id>NCT04507087</nct_id>
  </id_info>
  <brief_title>Documentary to Encourage Plant-based Eating</brief_title>
  <official_title>Randomized Controlled Trial of a Documentary to Encourage Plant-based Eating</official_title>
  <sponsors>
    <lead_sponsor>
      <agency>Stanford University</agency>
      <agency_class>Other</agency_class>
    </lead_sponsor>
  </sponsors>
  <source>Stanford University</source>
  <oversight_info>
    <has_dmc>No</has_dmc>
    <is_fda_regulated_drug>No</is_fda_regulated_drug>
    <is_fda_regulated_device>No</is_fda_regulated_device>
  </oversight_info>
  <brief_summary>
    <textblock>
      This study will assess whether watching a documentary video about the health, environmental,&#xD;
      and ethical consequences of eating meat and animal products reduces participants'&#xD;
      self-reported intake of these items.&#xD;
    </textblock>
  </brief_summary>
  <detailed_description>
    <textblock>
      See detailed preregistration: https://osf.io/xrckh/registrations&#xD;
    </textblock>
  </detailed_description>
  <overall_status>Completed</overall_status>
  <start_date type="Actual">August 26, 2020</start_date>
  <completion_date type="Actual">December 31, 2020</completion_date>
  <primary_completion_date type="Actual">September 7, 2020</primary_completion_date>
  <phase>N/A</phase>
  <study_type>Interventional</study_type>
  <has_expanded_access>No</has_expanded_access>
  <study_design_info>
    <allocation>Randomized</allocation>
    <intervention_model>Parallel Assignment</intervention_model>
    <primary_purpose>Other</primary_purpose>
    <masking>None (Open Label)</masking>
  </study_design_info>
  <primary_outcome>
    <measure>Total meat and animal product consumption</measure>
    <time_frame>Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection</time_frame>
    <description>Self-reported meat and animal product consumption (ounces consumed over the past week)</description>
  </primary_outcome>
  <secondary_outcome>
    <measure>Total meat consumption</measure>
    <time_frame>Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection</time_frame>
    <description>Self-reported meat consumption (ounces consumed over the past week)</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Total animal product consumption</measure>
    <time_frame>Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection</time_frame>
    <description>Self-reported animal product consumption (ounces consumed over the past week)</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Consumption of each of 8 individual categories of meats and animal products</measure>
    <time_frame>Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection</time_frame>
    <description>Self-reported consumption (ounces consumed over the past week)</description>
  </secondary_outcome>
  <secondary_outcome>
    <measure>Total consumption of selected, healthy plant-based foods (ounces consumed over the past week)</measure>
    <time_frame>Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection</time_frame>
    <description>Self-reported consumption (ounces consumed over the past week)</description>
  </secondary_outcome>
  <other_outcome>
    <measure>Perceived importance of health</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <other_outcome>
    <measure>Perceived importance of environmental sustainability</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <other_outcome>
    <measure>Perceived importance of animal welfare</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <other_outcome>
    <measure>Speciesism</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <other_outcome>
    <measure>Interest in animal welfare activism and reform</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <other_outcome>
    <measure>Social dominance orientation</measure>
    <time_frame>2 weeks after baseline data collection</time_frame>
    <description>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.</description>
  </other_outcome>
  <number_of_arms>2</number_of_arms>
  <enrollment type="Actual">650</enrollment>
  <condition>Eating Behavior</condition>
  <arm_group>
    <arm_group_label>Intervention</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>See detailed preregistration: https://osf.io/xrckh/registrations</description>
  </arm_group>
  <arm_group>
    <arm_group_label>Control</arm_group_label>
    <arm_group_type>Sham Comparator</arm_group_type>
    <description>See detailed preregistration: https://osf.io/xrckh/registrations</description>
  </arm_group>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Documentary</intervention_name>
    <description>A 20-minute documentary about the health, environmental, and animal welfare consequences of eating meat and animal products</description>
    <arm_group_label>Intervention</arm_group_label>
  </intervention>
  <intervention>
    <intervention_type>Behavioral</intervention_type>
    <intervention_name>Control</intervention_name>
    <description>A 20-minute unrelated video (a motivational talk entitled &quot;Listening to shame&quot;)</description>
    <arm_group_label>Control</arm_group_label>
  </intervention>
  <eligibility>
    <criteria>
      <textblock>
        Inclusion Criteria:&#xD;
&#xD;
          -  Participant is currently located in the United States&#xD;
&#xD;
          -  Participant is at least 18 years old&#xD;
&#xD;
        Exclusion Criteria:&#xD;
&#xD;
          -  Participant is located outside the United States&#xD;
&#xD;
          -  Participant is less than 18 years old&#xD;
      </textblock>
    </criteria>
    <gender>All</gender>
    <minimum_age>18 Years</minimum_age>
    <maximum_age>N/A</maximum_age>
    <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
  </eligibility>
  <overall_official>
    <last_name>Maya B Mathur, PhD</last_name>
    <role>Principal Investigator</role>
    <affiliation>Stanford University</affiliation>
  </overall_official>
  <location>
    <facility>
      <name>Maya Mathur</name>
      <address>
        <city>Palo Alto</city>
        <state>California</state>
        <zip>94304</zip>
        <country>United States</country>
      </address>
    </facility>
  </location>
  <location_countries>
    <country>United States</country>
  </location_countries>
  <link>
    <url>https://osf.io/xrckh/</url>
    <description>Future location of data, code, and materials</description>
  </link>
  <link>
    <url>https://osf.io/xrckh/registrations</url>
    <description>Detailed preregistration</description>
  </link>
  <verification_date>March 2021</verification_date>
  <study_first_submitted>July 31, 2020</study_first_submitted>
  <study_first_submitted_qc>August 5, 2020</study_first_submitted_qc>
  <study_first_posted type="Actual">August 11, 2020</study_first_posted>
  <last_update_submitted>March 15, 2021</last_update_submitted>
  <last_update_submitted_qc>March 15, 2021</last_update_submitted_qc>
  <last_update_posted type="Actual">March 17, 2021</last_update_posted>
  <responsible_party>
    <responsible_party_type>Principal Investigator</responsible_party_type>
    <investigator_affiliation>Stanford University</investigator_affiliation>
    <investigator_full_name>Maya Mathur</investigator_full_name>
    <investigator_title>Assistant Professor</investigator_title>
  </responsible_party>
  <patient_data>
    <sharing_ipd>Yes</sharing_ipd>
    <ipd_description>All materials and analysis code required to reproduce all results will be made publicly available. All data except for participants' counties of residence (which is considered identifying information) will also be made publicly available.</ipd_description>
    <ipd_info_type>Study Protocol</ipd_info_type>
    <ipd_info_type>Statistical Analysis Plan (SAP)</ipd_info_type>
    <ipd_info_type>Informed Consent Form (ICF)</ipd_info_type>
    <ipd_info_type>Analytic Code</ipd_info_type>
    <ipd_time_frame>Immediately upon journal acceptance or earlier if possible given embargo policies.</ipd_time_frame>
    <ipd_access_criteria>Public availability</ipd_access_criteria>
    <ipd_url>https://osf.io/xrckh/</ipd_url>
  </patient_data>
  <!-- Results have not yet been posted for this study                                          -->
</clinical_study>


download date: ClinicalTrials.gov processed this data on September 20, 2023
link text: Link to the current ClinicalTrials.gov record.
url: https://clinicaltrials.gov/ct2/show/NCT04507087
org study id: eatingveg
nct id: NCT04507087
lead sponsor: 
has dmc: No
is fda regulated drug: No
is fda regulated device: No
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.
See detailed preregistration: https://osf.io/xrckh/registrations
allocation: Randomized
intervention model: Parallel Assignment
primary purpose: Other
masking: None (Open Label)
measure: Total meat and animal product consumption
time frame: Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection
description: Self-reported meat and animal product consumption (ounces consumed over the past week)
measure: Total meat consumption
time frame: Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection
description: Self-reported meat consumption (ounces consumed over the past week)
measure: Total animal product consumption
time frame: Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection
description: Self-reported animal product consumption (ounces consumed over the past week)
measure: Consumption of each of 8 individual categories of meats and animal products
time frame: Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection
description: Self-reported consumption (ounces consumed over the past week)
measure: Total consumption of selected, healthy plant-based foods (ounces consumed over the past week)
time frame: Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection
description: Self-reported consumption (ounces consumed over the past week)
measure: Perceived importance of health
time frame: 2 weeks after baseline data collection
description: 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.
measure: Perceived importance of environmental sustainability
time frame: 2 weeks after baseline data collection
description: 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.
measure: Perceived importance of animal welfare
time frame: 2 weeks after baseline data collection
description: 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.
measure: Speciesism
time frame: 2 weeks after baseline data collection
description: 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.
measure: Interest in animal welfare activism and reform
time frame: 2 weeks after baseline data collection
description: 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.
measure: Social dominance orientation
time frame: 2 weeks after baseline data collection
description: 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.
arm group label: Intervention
arm group type: Experimental
description: See detailed preregistration: https://osf.io/xrckh/registrations
arm group label: Control
arm group type: Sham Comparator
description: See detailed preregistration: https://osf.io/xrckh/registrations
intervention type: Behavioral
intervention name: Documentary
description: A 20-minute documentary about the health, environmental, and animal welfare consequences of eating meat and animal products
arm group label: Intervention
intervention type: Behavioral
intervention name: Control
description: A 20-minute unrelated video (a motivational talk entitled "Listening to shame")
arm group label: Control
criteria: 
gender: All
minimum age: 18 Years
maximum age: N/A
healthy volunteers: Accepts Healthy Volunteers
last name: Maya B Mathur, PhD
role: Principal Investigator
affiliation: Stanford University
facility: 
country: United States
url: https://osf.io/xrckh/
description: Future location of data, code, and materials
url: https://osf.io/xrckh/registrations
description: Detailed preregistration
responsible party type: Principal Investigator
investigator affiliation: Stanford University
investigator full name: Maya Mathur
investigator title: Assistant Professor
sharing ipd: Yes
ipd description: All materials and analysis code required to reproduce all results will be made publicly available. All data except for participants' counties of residence (which is considered identifying information) will also be made publicly available.
ipd info type: Study Protocol
ipd info type: Statistical Analysis Plan (SAP)
ipd info type: Informed Consent Form (ICF)
ipd info type: Analytic Code
ipd time frame: Immediately upon journal acceptance or earlier if possible given embargo policies.
ipd access criteria: Public availability
ipd url: https://osf.io/xrckh/