Memory for Flu Facts and Myths and Effects on Vaccine Intentions
|First Received Date ICMJE||February 23, 2006|
|Last Updated Date||February 23, 2006|
|Start Date ICMJE||March 2005|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE
||Memory for truth of information in a flyer.|
|Original Primary Outcome Measures ICMJE||Same as current|
|Change History||No Changes Posted|
|Current Secondary Outcome Measures ICMJE
||Intention to get flu vaccine in upcoming season.|
|Original Secondary Outcome Measures ICMJE||Same as current|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Memory for Flu Facts and Myths and Effects on Vaccine Intentions|
|Official Title ICMJE||"Myths and Facts" About the Flu: Health Education Campaigns Can Reduce Vaccination Intentions|
Objectives: To determine whether people systematically misremember the “myths” (false information) as true, and to assess effects on perceptions of risk and behavioral intentions.
Public information campaigns often warn people about false and unreliable medical claims by juxtaposing “myths” and “facts.” The effectiveness of such communications has rarely been assessed. We assessed whether people systematically misremember the “myths” (false information) as true, and to assess effects on perceptions of risk and behavioral intentions.
In an experimental study, participants read either a published CDC flyer on “Facts and Myths” about the flu vaccine, or a “Facts Only” version; a separate control group read no flyer. Participants completed the outcome measures either immediately or after 30 minutes.
Primary measures were memory for information about the flu presented in the flyer, ratings of perceived risks associated with the flu, and personal intentions to get vaccinated in the upcoming season.
After a delay of 30 minutes, participants who read the “Facts and Myths” flyer systematically misremembered myths as facts. Both versions of the flyer had the immediate effect of increasing intentions to get a flu vaccine, compared to the control group. After 30 minutes, however, participants who read the “Facts and Myths” flyer reported lower intentions to get vaccinated, compared to those who read the same flyer with no delay, and compared to all participants who read the “Facts Only” flyer.
In sum, people show a bias to think that incompletely remembered information is true, turning “myths” into “facts.” Hence public information campaigns should emphasize information that is true. Repeating false information, even as a warning, can create the unintended consequence of belief in the information.
|Study Type ICMJE||Interventional|
|Study Phase||Not Provided|
|Study Design ICMJE||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Factorial Assignment
Primary Purpose: Educational/Counseling/Training
|Condition ICMJE||Influenza Vaccines|
|Intervention ICMJE||Behavioral: Memory for truth|
|Study Arm (s)||Not Provided|
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Completion Date||June 2005|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
|Ages||18 Years to 26 Years|
|Accepts Healthy Volunteers||Yes|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||United States, Canada|
|NCT Number ICMJE||NCT00296270|
|Other Study ID Numbers ICMJE||RIR13914|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||University of Michigan|
|Collaborators ICMJE||Not Provided|
|Information Provided By||University of Michigan|
|Verification Date||February 2006|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP