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Psychological interpretation of the feeling of deja vu

Have you ever had the experience of suddenly feeling familiar with the scene in front of you, knowing everything and every detail like the back of your hand, even the next scene, as if you had experienced it? However, this is not the case. According to a recent survey, two-thirds of adults have had this "deja vu" experience at least once. According to the analysis of Peking University psychology professor and doctoral supervisor, deja vu will happen to everyone. However, if this feeling is too frequent and intense, it is a kind of morbid state.

Interaction between perception and memory

"deja vu" is the result of the interaction between the perception system and the memory system in the human brain. In order to understand why there is a feeling of deja vu, scientists have to classify it from perception and memory. Classification process is the basic feature of perception and memory. Perception includes perception of face, perception of object, perception of position and so on. Take these three categories as examples. Because their objects are different, when we arrive at a place, the relationship between orientation and space, the surrounding objects and people may appear at the same time. Our perception of them is completed by three different empty energy circuits in the brain, namely, position perception circuit, object perception circuit and face perception circuit. Similar to perception, there are many kinds of memories.

The memory of knowledge and feelings is called semantic memory: the memory of plots, experiences and events, that is, situational memory, is unconscious memory. Each kind of memory can be divided into many small categories. Because perception and memory are classified, many characteristics of some scenes we have experienced are stored in different memory systems, but we can't realize that when we go to a new scene, some parts of the scene may stimulate some of our memories and mobilize different memory systems in the brain to match them. Once a feature in the scene matches the past experience, there will be a feeling of deja vu. Everyone has a life experience, because there are a lot of things accumulated, and it is normal to have a subjective experience of "deja vu" occasionally. The initial understanding of the subjective experience of deja vu can be traced back to epilepsy in medicine or half a century ago. Normal people will also have this kind of subjective experience. With the accumulation of brain science knowledge, they have gradually reached today's level of understanding.

Emotional instability often happens.

It is not easy to realize deja vu. "deja vu" easily occurs in the state of emotional instability and the experience of the scene. Although everyone will experience "deja vu" subjectively, it does not mean that "deja vu" happens to everyone at the same frequency. Generally speaking, things closely related to emotions are easy to remember. Therefore, if you are in a state of emotional instability, then the probability of "deja vu" is great. In a person's life, menopause and adolescence, people's endocrine will undergo drastic changes, which will make people in a state of emotional instability and memory will become very active. At this time, "deja vu" is more likely to occur. "deja vu" mainly occurs in the experience of the scene, because every perception appears in a specific scene. This kind of scene is often a big background, and it will run to the brain to form unconscious memories without special attention. This unconscious memory sometimes pops up in a specific scene and is mixed with perception. In the phenomenon of "deja vu", most of the transferred memories are unconscious. From childhood, all experiences, whether you want to remember them or not, have traces of these memories in your mind, and they pop up under some very special circumstances. When consciousness is introduced, the feeling of "deja vu" is produced.