The public's opinions on the effect on COVID-19 vaccine intentions from information about people's extreme actions to get vaccinated

Last registered on May 11, 2021
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Pre-Trial

Trial Information

General Information

Title
The public's opinions on the effect on COVID-19 vaccine intentions from information about people's extreme actions to get vaccinated
RCT ID
AEARCTR-0007656
Initial registration date
May 10, 2021

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 11, 2021, 11:48 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

Country
United States of America
Region

Primary Investigator

Name
Linda Thunstrom
Affiliation
University of Wyoming
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Other Primary Investigator(s)

PI Name
Johanna Mollerstrom
PI Affiliation
George Mason University
Contact Investigator

Additional Trial Information

Status
In development
Start date
2021-05-10
End date
2021-06-15
Keywords
Behavior
Additional Keywords
COVID-19 vaccine; vaccine intentions
JEL code(s)
Secondary IDs
Abstract
In this study, participants will be asked to predict and explain the effects on COVID-19 vaccine intentions from two types of information about extreme behavior to secure access to the vaccine. More precisely, participants in treatment 1 will be asked to predict and explain the effect on vaccine intentions from information about some people taking extreme actions to jump the line for the vaccines, and participants in treatment 2 will be asked to predict and explain the effect on vaccine intentions from information about so called "vaccine hunters." (Participants' predictions will later be compared to the actual outcome, i.e., results from a previous study that documents the effects on vaccine intentions from the information about the extreme behavior described in treatment 1 and 2 in the current study.)
External Link(s)

Registration Citation

Citation
Mollerstrom, Johanna and Linda Thunstrom. 2021. "The public's opinions on the effect on COVID-19 vaccine intentions from information about people's extreme actions to get vaccinated." AEA RCT Registry. May 11. https://doi.org/10.1257/rct.7656-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Participants will receive a description of extreme behavior that has been reported in popular media to secure access to a COVID-19 vaccine prior to being eligible for the vaccine in the U.S. Participants in treatment 1 will get a description of some people taking extreme actions to jump the line for vaccinations, while participants in treatment 2 will get a description of so called vaccine hunters. Participants will thereafter be asked to predict and explain the effect on vaccine intentions from information about the extreme actions to secure the vaccine that were described to them. (Participants' predictions will later be compared to the actual outcome, i.e., results from a previous study that documents the effects on vaccine intentions from the information about the extreme behavior described in treatment 1 and 2 in the current study.)
Intervention Start Date
2021-05-11
Intervention End Date
2021-06-11

Primary Outcomes

Primary Outcomes (end points)
Participants prediction of the effect on COVID-19 vaccine intentions (increase/decrease/are unaffected) from the extreme behavior described to them. Participants' open ended and multiple-choice answers as to why these results occur.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Participants will be randomized into one of two treatments. Participants in treatment 1 will get a description of some people taking extreme actions to jump the line for vaccinations, while participants in treatment 2 will get a description of so called vaccine hunters. Participants will thereafter be asked to predict and explain the effect on vaccine intentions from information about the extreme actions to secure the vaccine that were described to them. Participants' predictions will be compared to the actual outcome, i.e., results from a previous study that documents the effects on vaccine intentions from the information about the extreme behavior described in treatment 1 and 2 in the current study, and participants who predicted the actual outcome will be financially rewarded.
Experimental Design Details
Randomization Method
By computer.
Randomization Unit
Individual.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
0
Sample size: planned number of observations
800
Sample size (or number of clusters) by treatment arms
400 in treatment 1, 400 in treatment 2.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
IRB at George Mason University
IRB Approval Date
2021-05-10
IRB Approval Number
1756922-1
Analysis Plan

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials