Theory and Practice in Risk Communication: A Review of the Literature and Visions for the Future
2011
When Monica was in the 18th week of pregnancy with her fi rst child, her doctor ordered
the quad screening test, which examines for four particular substances in maternal blood to
identify pregnancies at risk for Down syndrome. A week after the test Monica received the
results: Low levels of AFP and abnormal levels of hCG and estriol. The medical aide on the
phone said very calmly, “This test may indicate that the developing baby has Trisomy 21
(Down syndrome). Your baby has a 1 in 200 chance of being born with Down syndrome.”
The purpose of explaining these results was clear; it was to help Monica and her spouse
make an eff ective decision among many options: Pursue potential interventions that may
exist, begin planning for a child with special needs, address potential lifestyle changes,
look for support groups, or make a decision about carrying the child to term. Monica had
important information to digest and share with her husband. And, both had to understand
that the baby might not have any special needs at all (in fact, the baby did not have Down
syndrome)—indeed, uncertainty was high. This kind of risk information is vital to healthrelated decision making, though some individuals may not pursue interventions or additional testing regardless of the risk information. Perhaps they will have the baby regardless
of the results; maybe aborting the pregnancy is not an option; and some parents choose
not to allow any testing that poses a risk of harming the baby. In other words, receiver
characteristics also play a substantial role in responses to risk information. This intersection
between message and receiver, theory and practice, and their eff ect on risk decision making
is the focus of this chapter.
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