Persuasive Messages for COVID-19 Vaccine Uptake: a Randomized Controlled Trial, Part 1
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Yale University
- Enrollment
- 4,000
- Locations
- 1
- Primary Endpoint
- Intention to get COVID-19 vaccine
Study Overview
Brief Summary
This study tests different messages about vaccinating against COVID-19 once the vaccine becomes available. Participants are randomized to 1 of 12 arms, with one control arm and one baseline arm. We will compare the reported willingness to get a COVID-19 vaccine at 3 and 6 months of it becoming available between the 10 intervention arms to the 2 control arms.
Study participants are recruited online by Lucid, which matches census based sampling in online recruitment.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Other
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •At least 18 years of age
- •US resident
Exclusion Criteria
- •Younger than 18 years of age
- •Non-US resident
- •Do not consent
Arms & Interventions
Social pressure- anger
Experimental message arm.
Intervention: Anger message (Other)
Trust in science
Experimental message arm.
Intervention: Trust in science message (Other)
Control
Control message about birdfeeding
Intervention: Control message (Other)
Baseline message
These participants will be assigned a message about the benefits of vaccination. All other treatment arms include this baseline language.
Intervention: Baseline message (Other)
Personal freedom
Experimental message arm.
Intervention: Personal freedom message (Other)
Economic freedom
Experimental message arm.
Intervention: Economic freedom message (Other)
Social benefit, self-interest
Experimental message arm.
Intervention: Self-interest message (Other)
Social benefit, community interest
Experimental message arm.
Intervention: Community interest message (Other)
Economic benefit
Experimental message arm.
Intervention: Economic benefit message (Other)
Social pressure- guilt
Experimental message arm.
Intervention: Guilt message (Other)
Social pressure- embarrassment
Experimental message arm.
Intervention: Embarrassment message (Other)
Not bravery arm
Experimental message arm.
Intervention: Not bravery message (Other)
Outcomes
Primary Outcomes
Intention to get COVID-19 vaccine
Time Frame: Immediately after intervention, in the same survey in which the intervention message is provided
This is a self reported measure, immediately after the intervention message, of the likelihood of getting a COVID-19 vaccination within 3 months and then 6 months of it becoming available. During analysis, responses among those assigned to different intervention messages will be compared to those in the control group.
Secondary Outcomes
- Persuade others item(Immediately after intervention, in the same survey in which the intervention message is provided)
- Fear of those who have not been vaccinated(Immediately after intervention, in the same survey in which the intervention message is provided)
- Vaccine confidence scale(Immediately after intervention, in the same survey in which the intervention message is provided)
- Social judgment of those who do not vaccinate(Immediately after intervention, in the same survey in which the intervention message is provided)