I can't get to the study. There's just an abstract there. All it says is that religious and paranormal belief is predicted based on poor understanding of the physical world. I'm thinking there must be definitions that they used to make that work.
China has one of the lowest rates of religion. The US has some of the highest rates of religion.
Are they saying that people in the US have the highest rates of poor understanding of the physical world (whatever that means) compared to people around the world?
I'm very skeptical.