
"Though the reasons behind why people experience déjà vu are not yet fully understood, over the past two decades, great scientific progress has been made toward understanding it," Anne Cleary Ph.D., head of the Human Memory Lab at Colorado State University, tells Bustle.ĭéjà vu first entered scientific circles in 1876, when the French philosopher and investigator of the paranormal Émile Boirac coined the term in a letter. And understanding how déjà vu works might shed light on the functions of human memory and our complex brains. Déjà vu is a psychiatric oddity that's extremely common, occurring in about 60% of the population. It's a sudden sensation, often short-lived, that suggests that you've experienced your current situation before, and are recalling it vividly, even when you know you haven't.

If you've experienced a flicker of recognition as you do something - pet a cat, watch a film, enter a house you know you've never been in before - you've experienced the puzzling psychological phenomenon that is déjà vu.
