The Mandela Effect: why so many people remember it wrong

When memory fails as a group

The name comes from people who "remembered" Nelson Mandela dying in prison in the 1980s, although he was released and became president. The striking part is not that one person is wrong, but that many people are wrong in the same way.

Read also: Why you can't tickle yourself and Why do we dream? What science has found so far.

What the study tested

Researchers at the University of Chicago tested well-known images, such as characters and logos, asking participants to pick the correct version among similar options. For some images, most people chose the same wrong version, with high confidence. The authors called it the Visual Mandela Effect.

Source: Prasad and Bainbridge, The Visual Mandela Effect, Psychological Science, 2022.

Why it happens

The study found no single explanation. The error did not depend on how often people saw the image, and it did not always follow the most common format for that kind of figure. The authors suggest that some images have details the brain tends to complete in the same way across different people.

Memory does not work like a recording. It rebuilds the event each time, and expectations and patterns enter that rebuild.

What it teaches

Being certain about a memory does not make it accurate. For important decisions, check records instead of trusting memory alone, yours or a group's.

See also why we do not remember our first years.