Anti-vaccine conspiracy theories may have 'detrimental consequences' for children's health

February 25, 2014

A belief in anti-vaccine conspiracy theories may have significant and detrimental consequences for children's health, new research from the University of Kent has shown.

Researchers Daniel Jolley and Dr Karen Douglas, of the University's School of Psychology, surveyed 89 parents about their views on anti-vaccine conspiracy theories and then asked them to indicate their intention to have a fictional child vaccinated. It was found that stronger belief in anti-vaccine conspiracy theories was associated with lower intention to vaccinate.

In a second study, 188 participants were exposed to information concerning anti-vaccine conspiracy theories. It was found that reading this material reduced their intention to have a fictional child vaccinated, relative to participants who were given refuting information or those in a control condition.

Daniel Jolley said: 'This research is timely in the face of declining vaccination rates and recent outbreaks of vaccinated-against diseases in the UK, such as measles. Our studies demonstrate that anti-vaccine conspiracy theories may present a barrier to vaccine uptake, which may potentially have significant and detrimental consequences for children's health.'

Dr Douglas added: 'It is easy to treat belief in conspiracy theories lightly, but our studies show that wariness about conspiracy theories may be warranted. Ongoing investigations are needed to further identify the social consequences of conspiracism and to identify potential ways to combat the effects of an ever-increasing culture of conspiracism.'
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The research, titled 'The effects of anti-vaccine conspiracy theories on vaccination intentions', was carried out by Daniel Jolley, Postgraduate Researcher, and Dr Karen Douglas, Reader in Psychology, at the University of Kent. It is published in the open-access, online journal PLOS ONE and is available here: http://dx.plos.org/10.1371/journal.pone.0089177.

University of Kent

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