Reading a novel changes how your brain responds to other people for days after you put it down. A 2013 study at Emory University found changes in brain wiring that lasted at least five days after the book was done.
Gregory Berns gave 21 students a thriller, Pompeii by Robert Harris, and assigned a chunk each evening. Every morning they came in for a scan. During the reading period, the scans showed stronger wiring in the part of the brain that handles language and places you inside a story. The brain was acting as though it were living the events of the book.
The changes did not vanish overnight. They persisted into the mornings after the reading was done, even when the students were not thinking about the book. The researchers called it shadow activity, a kind of neural residue left behind by the experience of inhabiting another person's perspective.
A separate 2013 study in Science tested whether reading fiction made people better at reading emotions from someone's eyes. Across five experiments, people who had just read a short story scored higher on a standard test of emotional perception than people who had read nonfiction or popular fiction. The effect was immediate.
The two studies together say something simple: spending time inside a made-up person's head makes you better at understanding the people around you, and the change is not a feeling. It shows up in a brain scanner and on a test.
pubmed.ncbi.nlm.nih.gov/2398…