At one point in HBO’s Westworld (don’t worry, no spoilers) Robert Ford (Anthony Hopkins) gives a speech about stories, about the value of fiction. He references a belief that fiction elevates — or at least illuminates to good value — the human condition. The belief also holds that those who read a lot of fiction are in some sense “better” people.
The idea is controversial on several grounds. Firstly, it’s hard to define what makes people “better,” and you can’t measure or test what you can’t define. Secondly, even if “better” is defined, not everyone will agree with the definition. Thirdly, there’s a nature-nurture aspect that makes comparisons like this very hard to tease out of any data you can gather.
Maybe a place to start exploring the idea is to first define “fiction” and go from there…