The intuitive answer is that some works of art are just great: of intrinsically superior quality. The paintings that win prime spots in galleries, get taught in classes and reproduced in books are the ones that have proved their artistic value over time. If you can’t see they’re superior, that’s your problem. It’s an intimidatingly neat explanation. But some social scientists have been asking awkward questions of it, raising the possibility that artistic canons are little more than fossilised historical accidents.

Cutting, a professor at Cornell University, wondered if a psychological mechanism known as the “mere-exposure effect” played a role in deciding which paintings rise to the top of the cultural league. In a seminal 1968 experiment, people were shown a series of abstract shapes in rapid succession. Some shapes were repeated, but because they came and went so fast, the subjects didn’t notice. When asked which of these random shapes they found most pleasing, they chose ones that, unbeknown to them, had come around more than once. Even unconscious familiarity bred affection.

When a work of art is considered great, we may stop thinking about it for ourselves. Ian Leslie explores why in Intelligent Life.