Eating Behavior
Conditions
Brief 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.
Detailed description
See detailed preregistration: https://osf.io/xrckh/registrations
Interventions
BEHAVIORALDocumentary
A 20-minute documentary about the health, environmental, and animal welfare consequences of eating meat and animal products
BEHAVIORALControl
A 20-minute unrelated video (a motivational talk entitled Listening to shame)
Sponsors
Stanford University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Total meat and animal product consumption | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | Self-reported meat and animal product consumption (ounces consumed over the past week) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Total meat consumption | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | Self-reported meat consumption (ounces consumed over the past week) |
| Total animal product consumption | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | Self-reported animal product consumption (ounces consumed over the past week) |
| Consumption of each of 8 individual categories of meats and animal products | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | Self-reported consumption (ounces consumed over the past week) |
| Total consumption of selected, healthy plant-based foods (ounces consumed over the past week) | Consumption over the 1-week time frame spanning approximately 1 week to 2 weeks after baseline data collection | Self-reported consumption (ounces consumed over the past week) |
Other
| Measure | Time frame | Description |
|---|---|---|
| Perceived importance of health | 2 weeks after baseline data collection | 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. |
| Social dominance orientation | 2 weeks after baseline data collection | 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. |
| Perceived importance of environmental sustainability | 2 weeks after baseline data collection | 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. |
| Perceived importance of animal welfare | 2 weeks after baseline data collection | 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. |
| Speciesism | 2 weeks after baseline data collection | 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. |
| Interest in animal welfare activism and reform | 2 weeks after baseline data collection | 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. |
Countries
United States
Outcome results
None listed