This was demonstrated by an experiment incorporating the computer game, The Sims (that’s right), in which two different locations (in this case a garden and a garage) with similar spatial layout but different items within them were created. The most viable theory currently is the memory-mismatch theory, where déjà vu is a sign of the brain looking through memories to see if there’s a mismatch between what we experience and what we remember.Īlthough some people equate déjà vu and clairvoyance, this is simply not the case. A malfunction in our neural circuitry may also be a cause, whereby information can directly be incorporated into our long-term memory so that when we experience something, we actually think it’s from sometime in the past. Another potential explanation is the hologram theory, where our brain takes in a small piece of information, like the smell of petrol at a gas station, and tries to reconstruct an entire ‘hologram’ of our memory where the same smell is stored. The ‘cell phone theory’ claims that we often take in information subconsciously, when we are distracted or not paying attention. Then, when are faced with a similar situation, our brain tries to associate the subliminally recorded information with the surroundings. There are many different proposed explanations for déjà vu. However, biological déjà vu has allowed scientists to dive deeper into the enigmatic origins of this phenomenon. Since associative déjà vu happens randomly and is affected by individual experiences, it is often difficult to characterize and probe. The other type, biological déjà vu, occurs in individuals with epilepsy, who often feel a strong sense of déjà vu before experiencing a seizure. They are also more frequently seen amongst those who are better educated and have higher incomes. It’s interesting to note that people between the ages of 15-25 and those who can recall their dreams are the most likely to report these déjà vu events. Associative déjà vu occurs in healthy individuals, and is the classic feeling of having experienced something based on the associations we make with a previous sensation. There are two types of déjà vu: associative and biological. The causes of déjà vu are still not yet fully understood, and over forty explanatory theories have been proposed, ranging from memory dysfunction to parallel universes. “Haven’t we had this conversation before?” Déjà vu, or ‘already seen’ in French, is when certain things, be it the sound, the sight, the smell, or the feel of something, lead us to believe that we’ve already experienced the event before. We’ve all been through it: we find ourselves in situations thinking that we’ve already experienced them. Think you’ve read this article already? Shail Bhatt explores the possible science behind déjà vu.
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