Psychologists called this the Gestalt familiarity hypothesis. We investigated a near century-old hypothesis that suggested déjà vu can happen when there’s a spatial resemblance between a current scene and an unrecalled scene in your memory. Prompted by Brown’s work, my own research team began conducting experiments aimed at testing hypotheses about possible mechanisms of déjà vu. His work served as a catalyst for scientists to design experiments to investigate déjà vu. He also reported on hints throughout a century or so of medical literature of a possible association between déjà vu and some types of seizure activity in the brain.īrown’s review brought the topic of déjà vu into the realm of more mainstream science, because it appeared in both a scientific journal that scientists who study cognition tend to read, and also in a book aimed at scientists. He determined that the most common trigger of déjà vu is a scene or place, and the next most common trigger is a conversation. From all these papers, Brown was able to glean some basic findings on the déjà vu phenomenon.įor example, Brown determined that roughly two thirds of people experience déjà vu at some point in their lives. But he also found studies that surveyed regular people about their déjà vu experiences. Much of what he could find had a paranormal flavor, having to do with the supernatural – things like past lives or psychic abilities. Moving from the paranormal to the scientificĮarly in this millennium, a scientist named Alan Brown decided to conduct a review of everything researchers had written about déjà vu until that point.
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