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Explaining seasonality increases perceived effectiveness of influenza vaccination: An experimental study.

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Title: Explaining seasonality increases perceived effectiveness of influenza vaccination: An experimental study.
Authors: Felgendreff, Lisa (AUTHOR), Rebitschek, Felix G. (AUTHOR), Shamsrizi, Parichehr (AUTHOR), Geiger, Mattis (AUTHOR), Jenny, Mirjam A. (AUTHOR), Betsch, Cornelia (AUTHOR)
Source: British Journal of Health Psychology. Feb2025, Vol. 30 Issue 1, p1-17. 17p.
Subjects: Vaccine effectiveness, Influenza vaccines, Awareness, Perception (Philosophy), Comparative studies, Public health, Seasons, Communication strategies
Abstract: Background: Doubts regarding vaccine effectiveness may prompt people to decide against a seasonal influenza vaccination. While fact boxes show the effectiveness in terms of cases prevented, people often lack knowledge about important contextual factors, for example, why the vaccine formulation needs to be updated annually, the vaccine mechanism and relevance of the antigen–virus match. Adding such contextual information could improve effectiveness perceptions. Objective: In a preregistered online experiment, we tested whether explaining the seasonality's relevance and mechanisms behind influenza vaccine effectiveness affects people's perceptions of influenza vaccination. We compared two means of explanation (an additional expository text vs. a narrative offering an analogy to improve understanding of vaccine effectiveness) with a control condition simply providing effectiveness information. Design: Unvaccinated participants (N = 1554) were assigned to one of three conditions: (1) fact box only (providing the influenza vaccine's benefit–risk profile; control group), (2) fact box plus informational expository text or (3) fact box plus narrative analogy. Methods: After the experimental manipulations, participants rated the vaccine's effectiveness in preventing influenza disease and answered knowledge questions. Effects on perceived risk of vaccination and intention to get vaccinated were also explored. Results: Reading the expository text increased the perceived vaccine effectiveness and overall knowledge, while reading the narrative analogy only increased the perceived vaccine effectiveness compared with the control condition. All other dependent variables were similar in both text conditions. Conclusions: Extended explanations of vaccine effectiveness can increase perceived vaccine effectiveness. The text format chosen can affect outcomes, such as vaccine‐related perceptions or knowledge. [ABSTRACT FROM AUTHOR]
Copyright of British Journal of Health Psychology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Explaining seasonality increases perceived effectiveness of influenza vaccination: An experimental study.
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  Data: <searchLink fieldCode="AR" term="%22Felgendreff%2C+Lisa%22">Felgendreff, Lisa</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rebitschek%2C+Felix+G%2E%22">Rebitschek, Felix G.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shamsrizi%2C+Parichehr%22">Shamsrizi, Parichehr</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Geiger%2C+Mattis%22">Geiger, Mattis</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jenny%2C+Mirjam+A%2E%22">Jenny, Mirjam A.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Betsch%2C+Cornelia%22">Betsch, Cornelia</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22British+Journal+of+Health+Psychology%22">British Journal of Health Psychology</searchLink>. Feb2025, Vol. 30 Issue 1, p1-17. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Vaccine+effectiveness%22">Vaccine effectiveness</searchLink><br /><searchLink fieldCode="DE" term="%22Influenza+vaccines%22">Influenza vaccines</searchLink><br /><searchLink fieldCode="DE" term="%22Awareness%22">Awareness</searchLink><br /><searchLink fieldCode="DE" term="%22Perception+%28Philosophy%29%22">Perception (Philosophy)</searchLink><br /><searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Public+health%22">Public health</searchLink><br /><searchLink fieldCode="DE" term="%22Seasons%22">Seasons</searchLink><br /><searchLink fieldCode="DE" term="%22Communication+strategies%22">Communication strategies</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Background: Doubts regarding vaccine effectiveness may prompt people to decide against a seasonal influenza vaccination. While fact boxes show the effectiveness in terms of cases prevented, people often lack knowledge about important contextual factors, for example, why the vaccine formulation needs to be updated annually, the vaccine mechanism and relevance of the antigen–virus match. Adding such contextual information could improve effectiveness perceptions. Objective: In a preregistered online experiment, we tested whether explaining the seasonality's relevance and mechanisms behind influenza vaccine effectiveness affects people's perceptions of influenza vaccination. We compared two means of explanation (an additional expository text vs. a narrative offering an analogy to improve understanding of vaccine effectiveness) with a control condition simply providing effectiveness information. Design: Unvaccinated participants (N = 1554) were assigned to one of three conditions: (1) fact box only (providing the influenza vaccine's benefit–risk profile; control group), (2) fact box plus informational expository text or (3) fact box plus narrative analogy. Methods: After the experimental manipulations, participants rated the vaccine's effectiveness in preventing influenza disease and answered knowledge questions. Effects on perceived risk of vaccination and intention to get vaccinated were also explored. Results: Reading the expository text increased the perceived vaccine effectiveness and overall knowledge, while reading the narrative analogy only increased the perceived vaccine effectiveness compared with the control condition. All other dependent variables were similar in both text conditions. Conclusions: Extended explanations of vaccine effectiveness can increase perceived vaccine effectiveness. The text format chosen can affect outcomes, such as vaccine‐related perceptions or knowledge. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of British Journal of Health Psychology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=183820238
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        Value: 10.1111/bjhp.12770
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        Text: English
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      – SubjectFull: Vaccine effectiveness
        Type: general
      – SubjectFull: Influenza vaccines
        Type: general
      – SubjectFull: Awareness
        Type: general
      – SubjectFull: Perception (Philosophy)
        Type: general
      – SubjectFull: Comparative studies
        Type: general
      – SubjectFull: Public health
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      – SubjectFull: Seasons
        Type: general
      – SubjectFull: Communication strategies
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      – TitleFull: Explaining seasonality increases perceived effectiveness of influenza vaccination: An experimental study.
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              Text: Feb2025
              Type: published
              Y: 2025
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