But when a fear interferes with a person's ability to function, it's classified as a phobia. According to the National Institute on Mental Health, 8.7 percent of Americans in 2008, or 19.2 million people, suffered from a phobia of some kind. It's not clear how many people are specifically afraid of theaters.
Pincus said that children and adults should understand the difference between possibility and probability.
"How many movies have you ever been to in your life and how often have you ever had trouble or danger present?" Pincus said. "The news does not show us…thousands of people went to the movies tonight and they they all had a wonderful time and all got home safely."
Yount says she knows she's more likely to be struck by lightning than to be shot at a movie theater, but she can't stop herself from reading news coverage of the shooting in Aurora. Although Yount was an avid Harry Potter fan who attended midnight showings of the films, she said she doesn't think she'll ever go to another midnight release.
"When you really enjoy anything and it kind of gets marred, it's never a nice thing," she said. "It will be months [before I return to the cinema], I can just tell. It's not something I'm going to rush to do."