- they have more of an attentional bias to negative, mortality-related events, which makes them remember this information better
The study It's noisy AF. They started with 212 people willing to fill out a survey on Mechanical Turk for $2 but only 158 of them finished. Their data looks like this: it appears that your "vaccine skepticism" relates to how you answered three vaccine questions using a seven point scale. 
The discrepancy in absolute estimation error resultsbetween the first study and the second may reflect the use of fewerevents in the second study, or it may suggest that vaccine skepti-cism is more reliably associated with less accurate relative fre-quency estimation abilities and a tendency to over-estimate rareevent frequencies.
What a polite way of saying that vaccine skeptics are less intelligent, at least when it comes to probabilistic reasoning. I thought we already knew that these same people were more easily susceptible to emotions overriding their logic circuits. Hey kid, I'm a computer. Stop all the downloadin'!