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Changelog

Brain Involuntary

Jamais vu

A familiar word, face or place suddenly feels strange, as if you are meeting it for the first time. It is the opposite of déjà vu, and researchers think it is rarer. In lab studies, more than half of people felt a common word turn strange after copying it about 30 times.

Unknown. Thought to be rarer than déjà vu.

Brain Perception

Prosopagnosia

People with prosopagnosia, or face blindness, find it hard to recognise faces, even those of family and friends. Most have had it all their lives. It can also start after brain damage. Estimates run from about 1 in 100 people to about 1 in 40, depending on how it is tested.

About 1–2.5% of people

Brain Perception

Aphantasia

Most people see a picture in their mind when they think of a friend's face. People with aphantasia see only a faint image or none. About 4 in 100 people are like this, and about 1 in 100 see nothing at all.…