They randomly assigned volunteers to one of three groups – literary fiction readers, popular fiction readers and a non-reading group. The first read extracts from texts shortlisted for the US National Book Award, while the second read extracts from Amazon.com bestsellers – popular fiction books with characters that are likely to be two-dimensional and straightforward to understand.

All three groups were then asked to identify the emotions behind facial expressions – a standard test of empathy. Those who had read the literary fiction showed a heightened ability to empathise compared with the other groups. The result was the same when they ran different tests with different volunteers. ( Science, doi.org/n5p).