The radio is good for taking somebody else's experience and making you understand what it would be like. Because when you don't see someone, but you hear them talking - and, uh, that is what radio is all about - it's like when someone is talking from the heart. Everything about it conspires to take you into somebody else's world.
One of the things I learned as a young semiotics nerd was that if you have plot moving forward, no matter how banal the facts of it, simply the fact that the plot is rolling forward makes you wonder what's going to happen next, which creates suspense. So you can control peoples' attention simply by having things move forward in a story.
When I was a bad writer, I would consciously imitate other NPR writers who I thought were wonderful. I suppose that everyone's artistic practice is different. But I collaborate and sometimes don't agree at all with my collaborators' opinions. It forces you to understand why you don't agree with something: what's the fight you're picking.
There is a kind of structure for a story that was peculiarly compelling for the radio. I thought I had invented it atom-by-atom sitting in an editing booth in Washington on M Street when I was in my 20s. Then I found out that it is one of the oldest forms of telling a story - it was the structure of a sermon.
The story is a machine for empathy. In contrast to logic or reason, a story is about emotion that gets staged over a sequence of dramatic moments, so you empathize with the characters without really thinking about it too much. It is a really powerful tool for imagining yourself in other people's situations.