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Randomized Controlled Trial
. 2010 Dec:81 Suppl:S70-6.
doi: 10.1016/j.pec.2010.08.014. Epub 2010 Sep 18.

Effective or ineffective: attribute framing and the human papillomavirus (HPV) vaccine

Cabral A Bigman  1 , Joseph N Cappella, Robert C Hornik
Affiliations
Randomized Controlled Trial

Effective or ineffective: attribute framing and the human papillomavirus (HPV) vaccine

Cabral A Bigman et al. Patient Educ Couns. 2010 Dec.

Abstract

Objective: To experimentally test whether presenting logically equivalent, but differently valenced effectiveness information (i.e. attribute framing) affects perceived effectiveness of the human papillomavirus (HPV) vaccine, vaccine-related intentions and policy opinions.

Methods: A survey-based experiment (N=334) was fielded in August and September 2007 as part of a larger ongoing web-enabled monthly survey, the Annenberg National Health Communication Survey. Participants were randomly assigned to read a short passage about the HPV vaccine that framed vaccine effectiveness information in one of five ways. Afterward, they rated the vaccine and related opinion questions. Main statistical methods included ANOVA and t-tests.

Results: On average, respondents exposed to positive framing (70% effective) rated the HPV vaccine as more effective and were more supportive of vaccine mandate policy than those exposed to the negative frame (30% ineffective) or the control frame. Mixed valence frames showed some evidence for order effects; phrasing that ended by emphasizing vaccine ineffectiveness showed similar vaccine ratings to the negative frame.

Conclusion: The experiment finds that logically equivalent information about vaccine effectiveness not only influences perceived effectiveness, but can in some cases influence support for policies mandating vaccine use.

Practice implications: These framing effects should be considered when designing messages.

Keywords: HPV; Human Papillomavirus; attribute framing; cervical cancer; framing; vaccination; vaccine mandate.

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Conflict of interest statement

Conflict of interest statement: None declared.

Figures

Fig. 1
Fig. 1. HPV Vaccine Ratings by Frame Condition
Note: Vaccine rating measure ranges from 1=completely ineffective to 6=completely effective. Bars represent 95% confidence interval.
See this image and copyright information in PMC

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