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COUNTERING ANTIVACCINATION ATTITUDES

Tuesday, 4th of August 2015

Pictures of sick kids may work better than tests of statistical significance.

COUNTERING ANTIVACCINATION ATTITUDES

Zachary Hornea,1,2, Derek Powellb,1, John E. Hummela, and Keith J. Holyoakb

Author Affiliations

aDepartment of Psychology, University of Illinois at Urbana–Champaign, Champaign, IL 61802;

bDepartment of Psychology, University of California, Los Angeles, CA 90095

Edited by Susan Gelman, University of Michigan, Ann Arbor, MI, and approved June 11, 2015 (received for review February 26, 2015)

Abstract below; full text is at http://www.pnas.org/content/early/2015/07/28/1504019112.full.pdf

Myths about the safety of vaccinations have led to a decline in vaccination rates and the reemergence of measles in the United States, calling for effective provaccine messages to curb this dangerous trend. Prior research on vaccine attitude change suggests that it is difficult to persuade vaccination skeptics and that direct attempts to do so can even backfire. Here, we successfully countered peoples antivaccination attitudes by making them appreciate the consequences of failing to vaccinate their children (using information provided by the Centers for Disease Control and Prevention). This intervention outperformed another that aimed to undermine widespread vaccination myths.

Abstract

Three times as many cases of measles were reported in the United States in 2014 as in 2013. The reemergence of measles has been linked to a dangerous trend: parents refusing vaccinations for their children. Efforts have been made to counter peoples antivaccination attitudes by providing scientific evidence refuting vaccination myths, but these interventions have proven ineffective. This study shows that highlighting factual information about the dangers of communicable diseases can positively impact peoples attitudes to vaccination. This method outperformed alternative interventions aimed at undercutting vaccination myths.

Footnotes

↵1Z.H. and D.P. contributed equally to this work.

↵2To whom correspondence should be addressed. Email: horne2@illinois.edu.

Author contributions: Z.H., D.P., J.E.H., and K.J.H. designed research; Z.H. and D.P. performed research; Z.H. and D.P. analyzed data; and Z.H., D.P., J.E.H., and K.J.H. wrote the paper.

The authors declare no conflict of interest.

This article is a PNAS Direct Submission.

This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1504019112/-/DCSupplemental.