Then there are those who are absolutely convinced that their “reality” is The Only Reality. I don’t have any studies to back this up, but my guess is that a lot of the people who fall into this way of thinking have only lived in one place (usually a small one).
An example that comes to mind is a gentleman from the intensive Italian course I attended for five months when I lived in Lugano. He was Swiss-German but had lived in Boston for two years, which — in his mind at least — made him an expert on all things American!
He was convinced that he knew about all of America based on his brief experience of Boston. When questions about America came up in class, he would answer them. Despite having lived all my life in America, I was roundly ignored (oooh, it used to make me so mad)!
But you see, he fell into the trap of thinking that what he was able to see, touch, hear, and taste was the sum total of “reality”.