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"This has happened to me before..." scientists explain how the mysterious phenomenon of déjà vu occurs

2022-10-05 18:41:22Lifestyle SHKRUAR NGA REDAKSIA VOX
"This has happened to me before..." scientists explain how the
Déjà vu

Have you ever had that strange feeling that something happening makes you think "This has happened before" even though it's impossible?

This phenomenon known as déjà vu has long "troubled" philosophers, neurologists and writers. Since the year 1800, there have been various theories about what is called déjà vu or, in other words, "seen before".

According to Science Alert, at first it was thought that this phenomenon was due to mental dysfunction or an abnormal functioning of human memory. But until recently there were no scientific studies.

At the beginning of this millennium scientist Alan Brown decided to do a review of all the scientific data about déjà vu. Much of the evidence linked this phenomenon to psychic abilities, the supernatural, or past lives. But he also found studies where normal people have reported their experiences of experiencing déjà vu.

From the data found, scientist Brown was able to determine that approximately two-thirds of people experience déjà vu at some point in their lives. According to him, the most common cause of creating deja vu is a place or scene, and another cause can also be a conversation.

Alan Brown's work appeared in a scientific journal which served as a catalyst for scientists to conduct other experiments to investigate the deja vu phenomenon.

Testing déjà vu in the psychology lab

Spurred on by Brown's work, psychologists began conducting experiments aimed at testing hypotheses about the possible mechanisms of déjà vu.

According to psychologists, déjà vu can occur when there is a spatial similarity between an actual scene and an unremembered scene in your memory. Psychologists called this the Gestalt familiarity hypothesis.

“Imagine you are passing the nurses' station in a hospital unit on your way to visit a sick friend. Although you have never been to this hospital before, you have the feeling and conviction that you have been before. The underlying cause for this experience of déjà vu may be that the layout of the scene, including the placement of furniture and particular objects within the space, has the same layout as another scene you have experienced in the past."

"According to the Gestalt familiarity hypothesis, if that previous situation with an urban layout similar to the current one does not come to mind, you can only be left with a strong sense of familiarity for the current situation," the psychologists explain.

To investigate this idea in the lab, psychologists used virtual reality to place people inside scenes. This way they could manipulate the environments people were in, some scenes shared the same layout while not being identical. As predicted, déjà vu was more likely to occur when people were in a scene that contained the same spatial arrangement of elements as a previous scene they saw but did not remember.

This research suggests that a contributing factor to déjà vu may be the spatial similarity of a new scene to one in memory that fails to be consciously recalled at the moment.

However, this does not mean that spatial similarity is the only cause of déjà vu. Most likely, many factors can contribute to what makes a scene or situation feel familiar. Research is still underway to investigate possible additional factors at play in this mysterious phenomenon.


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