Dietary Exposure
Conditions
Brief summary
The goal of this experiment is to test the effects an ultraprocessed warning label on foods and beverages among Brazilian consumers. The main questions it aims to answer are: * Do ultraprocessed warnings affect Brazilian consumers' intention to purchase products? * Do ultraprocessed warnings affect Brazilian consumers' product perceptions? Participants will see images of four products carrying either nutrient warning labels (which are currently mandatory in Brazil) or nutrient warning labels alongside an experimental warning label informing that the product is ultraprocessed. Participants will then answer survey questions about each product. Researchers will compare responses between both arms to determine if the ultraprocessed warning significantly changes the effect of nutrient warnings.
Interventions
BEHAVIORALNutrient warning labels
Inclusion of nutrient warning labels, which are currently mandatory in Brazil, to images of food products.
BEHAVIORALNutrient and ultraprocessed warning labels
Inclusion of nutrient warning labels, which are currently mandatory in Brazil, and an experimental ultraprocessed warning label to images of food products.
Sponsors
The Bloomberg Family Foundation, Inc.
University of North Carolina, Chapel Hill
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* 18 years or older, * residing in Brazil, * responsible for at least 50% of the household's grocery purchases.
Exclusion criteria
* involvement in any pre-testing.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Purchase intentions | Online survey within 20 minutes following completion of a ~10 minute shopping task. | How likely the participant would be to buy products will be measured by survey. Response options are on a 1 to 5 scale, with higher scores representing a higher likelihood of buying products. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Product healthfulness perceptions | Online survey within 20 minutes following completion of a ~10 minute shopping task. | How healthy products seem to the participant will be measured by survey. Response options are on a 1 to 5 scale, with higher scores representing a higher perceived product healthfulness. |
| Product processing status perceptions | Online survey within 20 minutes following completion of a ~10 minute shopping task. | Whether the participant believes products are ultraprocessed will be measured by survey. Responses options are no, yes, and I'm not sure. |
| Message effectiveness perceptions | Online survey within 20 minutes following completion of a ~10 minute shopping task. | Perceived message effectiveness of the study labels will be measured by survey through a three-item scale. Items inquire about how much the labels discourage the participant from wanting to consume the products, how much the labels make the participant concerned about the health effects of consuming the products, and how much the labels make consuming the products seem unpleasant. Response options are on a 1 to 5 scale, with higher scores representing a higher perceived message effectiveness of the study labels. |
Countries
United States
Outcome results
None listed