Just created this meme, please share far and wide 🙂
I’ve frequently written about the “arrogance of ignorance,” a phenomenon that anyone who’s paid attention to what quacks, cranks, or antivaccine activists (but I repeat myself) write and say beyond a certain period of time will have encountered. Basically, it’s the belief found in such people—and amplified in groups—that somehow they can master a subject as well or better than experts who have spent their entire professional lives studying the subject on their own, often just through the use of Google University and the echo chamber discussion forums that they frequent with their fellow cranks. Thus we have, for example, the rambling clown car of antivaccine bloggers over at the crank blog Age of Autism declaring that, contrary to the mountains of evidence otherwise, vaccines cause autism, “brain damage,” autoimmune diseases and all sorts of mean and nasty other conditions. Skeptics quite properly point out that (1) there is no convincing evidence from well-designed and well-executed studies to support these links; (2) there is a lot of evidence from well-designed and well-executed studies that there is no link between vaccines and these conditions given that such studies invariably are unable to detect differences in the prevalence of these conditions associated with vaccines (or, in the case of the mercury militia, thimerosal-containing vaccines); meaning (3) the most parsimonious explanation for these results is that there almost certainly no link. What is the response? Antivaccine cranks will invoke the pharma shill gambit and all sorts of dire conspiracies on the part of the CDC, big pharma, the FDA, and the World Health Organization (WHO) to “suppress” smoking gun evidence that vaccines cause autism.
This is a well-known phenomenon known as the Dunning-Kruger effect, a phenomenon whereby people who are unknowledgeable or incompetent about a topic hold an unjustifiably elevated estimate of their own knowledge base on the topic. In the antivaccine movement, the Dunning-Kruger effect tends to take the form of parents who think that their University of Google knowledge trumps the knowledge of physicians and scientists . . .
By Thom Scott-Phillips via Gizmodo
Anti-vaccination beliefs can cause real, substantive harm, as shown by the recent outbreak of measles in the US. These developments are as shocking and distressing as their consequences are predictable. But if the consequences are so predictable, why do the beliefs persist?
It is not simply that anti-vaxxers don’t understand how vaccines work (some of them may not, but not all of them). Neither are anti-vaxxers simply resistant to all of modern medicine (I’m sure that many of them still take pain killers when they need to). So the matter is not as simple as plain stupidity. Some anti-vaxxers are not that stupid, and some stupid people are not anti-vaxxers. There is something more subtle going on.
We all have what psychologists call “folk” theories, or “naïve” theories, of how the world works. You do not need to learn Newton’s laws to believe that an object will fall to the floor if there is nothing to support it. This is just something you “know” by virtue of being human. It is part of our naïve physics, and it gives us good predictions of what will happen to medium-sized objects on planet earth.
Naïve physics is not such a good guide outside of this environment. Academic physics, which deals with very large and very small objects, and with the universe beyond our own planet, often produces findings that are an affront to common sense.
As well as physics, we also have naïve theories about the natural world (naïve biology) and the social world (naïve psychology). An example of naïve biology is “vitalistic causality” – the intuitive belief that a vital power or life force, acquired from food and water, is what makes humans active, prevents them from being taken ill, and enables them to grow. Children have this belief from a very young age.
Naïve theories of all kinds tend to persist even in the face of contradictory arguments and evidence. Interestingly, they persist even in the minds of those who, at a more reflexive level of understanding, know them to be false.