Table 2 Correction effects on targeted Zika misperceptions.

*P < 0.05, **P < 0.01, ***P < 0.005 (two-sided); OLS models with robust standard errors. Respondents are separate samples from Survey Sampling International’s online panel in Brazil. For each outcome measure, higher values indicate greater belief in the claim or claims in question [measured on a Likert scale ranging from “not at all accurate” (1) to “very accurate” (4); see the Supplementary Materials for wording]. All outcome measures are false.

Misperception beliefs
(mean)
GMO mosquitoes caused
outbreak
Larvicides responsible for
microcephaly
Vaccines responsible for
microcephaly
A. 2017 Zika experiment
Myths correction−0.00−0.080.020.07
(0.04)(0.06)(0.05)(0.05)
Constant1.69***1.92***1.63***1.53***
(0.03)(0.04)(0.04)(0.04)
n1249126012541255
B. 2018 Zika experiment
Myths correction−0.06−0.19***0.010.01
(0.05)(0.06)(0.06)(0.06)
Constant (placebo)1.68***1.89***1.62***1.55***
(0.03)(0.05)(0.04)(0.04)
n1049105910621058