COVID-19 Vaccine Messaging, Part 1
Persuasive Messages for COVID-19 Vaccine Uptake: a Randomized Controlled Trial, Part 1
1 other identifier
interventional
4,000
1 country
1
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.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for not_applicable
Started Jul 2020
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 2, 2020
CompletedStudy Start
First participant enrolled
July 3, 2020
CompletedFirst Posted
Study publicly available on registry
July 7, 2020
CompletedPrimary Completion
Last participant's last visit for primary outcome
July 8, 2020
CompletedStudy Completion
Last participant's last visit for all outcomes
July 8, 2020
CompletedMay 5, 2022
April 1, 2022
5 days
July 2, 2020
April 29, 2022
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Intention to get COVID-19 vaccine
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.
Immediately after intervention, in the same survey in which the intervention message is provided
Secondary Outcomes (4)
Vaccine confidence scale
Immediately after intervention, in the same survey in which the intervention message is provided
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
Social judgment of those who do not vaccinate
Immediately after intervention, in the same survey in which the intervention message is provided
Study Arms (12)
Control
SHAM COMPARATORControl message about birdfeeding
Baseline message
ACTIVE COMPARATORThese participants will be assigned a message about the benefits of vaccination. All other treatment arms include this baseline language.
Personal freedom
EXPERIMENTALExperimental message arm.
Economic freedom
EXPERIMENTALExperimental message arm.
Social benefit, self-interest
EXPERIMENTALExperimental message arm.
Social benefit, community interest
EXPERIMENTALExperimental message arm.
Economic benefit
EXPERIMENTALExperimental message arm.
Social pressure- guilt
EXPERIMENTALExperimental message arm.
Social pressure- embarrassment
EXPERIMENTALExperimental message arm.
Social pressure- anger
EXPERIMENTALExperimental message arm.
Trust in science
EXPERIMENTALExperimental message arm.
Not bravery arm
EXPERIMENTALExperimental message arm.
Interventions
2/15 of the sample will be assigned to the pure control group, which is a passage on the costs and benefits of bird feeding.
3/15 of the sample will be assigned to a control group with a message about the effectiveness and safety of vaccines.
1/15 of the sample will be assigned to this intervention, which is a message about how COVID-19 is limiting people's personal freedom and by working together to get enough people vaccinated society can preserve its personal freedom.
1/15 of the sample will be assigned to this intervention, which is a message about how COVID-19 is limiting peoples's economic freedom and by working together to get enough people vaccinated society can preserve its economic freedom.
1/15 of the sample will be assigned to this intervention, which is a message that COVID-19 presents a real danger to one's health, even if one is young and healthy. Getting vaccinated against COVID-19 is the best way to prevent oneself from getting sick.
1/15 of the sample will be assigned to this intervention, which is a message about the dangers of COVID-19 to the health of loved ones. The more people who get vaccinated against COVID-19, the lower the risk that one's loved ones will get sick. Society must work together and all get vaccinated.
1/15 of the sample will be assigned to this group, which is a message about how COVID-19 is wreaking havoc on the economy and the only way to strengthen the economy is to work together to get enough people vaccinated.
1/15 of the sample will be assigned to this message. The message is about the danger that COVID-19 presents to the health of one's family and community. The best way to protect them is by getting vaccinated and society must work together to get enough people vaccinated. Then it asks the participant to imagine the guilt they will feel if they don't get vaccinated and spread the disease.
1/15 of the sample will be assigned to this message. The message is about the danger that COVID-19 presents to the health of one's family and community. The best way to protect them is by getting vaccinated and by working together to make sure that enough people get vaccinated. Then it asks the participant to imagine the embarrassment they will feel if they don't get vaccinated and spread the disease.
1/15 of the sample will be assigned to this message. The message is about the danger that COVID-19 presents to the health of one's family and community. The best way to protect them is by getting vaccinated and by working together to make sure that enough people get vaccinated. Then it asks the participant to imagine the anger they will feel if they don't get vaccinated and spread the disease.
1/15 of the sample will be assigned to this message about how getting vaccinated against COVID-19 is the most effective way of protecting one's community. Vaccination is backed by science. If one doesn't get vaccinated that means that one doesn't understand how infections are spread or who ignores science.
1/15 of the sample will be assigned to this message which describes how firefighters, doctors, and front line medical workers are brave. Those who choose not to get vaccinated against COVID-19 are not brave.
Eligibility Criteria
You may qualify if:
- At least 18 years of age
- US resident
You may not qualify if:
- Younger than 18 years of age
- Non-US resident
- Do not consent
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Yale Universitylead
Study Sites (1)
Yale University
New Haven, Connecticut, 06510, United States
Related Publications (1)
James EK, Bokemper SE, Gerber AS, Omer SB, Huber GA. Persuasive messaging to increase COVID-19 vaccine uptake intentions. Vaccine. 2021 Dec 3;39(49):7158-7165. doi: 10.1016/j.vaccine.2021.10.039. Epub 2021 Oct 22.
PMID: 34774363RESULT
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- OTHER
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 2, 2020
First Posted
July 7, 2020
Study Start
July 3, 2020
Primary Completion
July 8, 2020
Study Completion
July 8, 2020
Last Updated
May 5, 2022
Record last verified: 2022-04
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL, SAP, ICF, ANALYTIC CODE
- Time Frame
- After publication
- Access Criteria
- Anonymized data and analysis code will be posted in a public replication archive
Anonymized data and analysis code will be posted in a public replication archive after publication.