five-day program run by dr. nancy zucker. >> so it's not just like a simple fix like eat this, right? because you've tried that. we're not just talking about i don't like my broccoli and i'm not going to eat my peas. >> reporter: dr. zucker runs the center for eating disorders at duke where they're just starting to study food neophobia. >> can you take me inside the mind of a picky eater? >> my best guess would be where we would look at a plate of food and say, like, oh, look at this lovely food adventure. i wonder what this tastes like? they would look at a plate of food and be like, danger, danger. >> reporter: the first few days focus on the psychology behind erin's eating. testing her anxiety levels. they also evaluate her sense of smell and count her taste buds to see if she's hypersensitive. how do you lead them from eating five foods to eating a range of foods?