There is also an interesting Press Release about this research from the New School in New York City:
http://www.newschool.edu/pressroom/pressreleases/2013/CastanoKidd.htm
The article and the press release both refer to ToM Theory of Mind. Here is a brief description of what this term actually means: http://www.howstuffworks.com/theory-of-mind.htm
Another older piece of research:
Bookworms versus nerds: Exposure to fiction versus non-fiction, divergent associations with social ability, and the simulation of fictional social worlds. Authors: Raymond A. Mar, Keith Oatley, Jacob Hirsh, Jennifer dela Paz, Jordan B. Peterson. published by the University of Toronto in 2006. http://www.sciencedirect.com/science/article/pii/S009265660500053X