Deja Vu

By Cameron Lindeman and Israel Alvarado

Why choose Deja Vu?

We chose the topic Deja Vu because we thought it was interesting and we would like to figure out why and how humans experience Deja Vu. The topic we research would better help us understand the cause and effect of Deja Vu. Our research might help somebody understand why they experience Deja Vu.

About Deja Vu

Deja Vu in french means "Already Seen" and its the feeling that you have done the event you are currently doing before. Scientist explain it as a anomaly in the brain, and creates a impression event in the brain that you've might have done in the past.

Interesting Stuff.

People who experience Deja Vu can remember dreams and they can even lucid dream.
Deja Vu has had a influx of experience in the last 2 years.


Scientist have not exactly pinpointed what goes on in the brain while you experience deja vu but make good guesses based on models of memory. Memory requires two cooperating processes: familiarity and recollection. Familiarity happens very fast, even before the brain can recall the source of the feeling and Depends on regions of the medial temporal cortex. Recollection depends on the hippocampus and prefrontal cortex. When both are in sync it is able to cause deja vu. What fails in the brain is the visual cortex causing a visual disconnect. Where one part of your brain would visualize the information and the other part would delay the information and process it as a memory. What also might be happening in the brain or failing is you could be going through an epileptic episode where neurons all fire in sync. Deja vu could even occur due to brain damage in the temporal lobe of the brain. Another theory that addresses this topic is The Hologram Theory. The theory proposed the idea that memories are like holograms and you are able to recreate what you might remember seeing based on a small detail and recreate everything else about what you might think you remember.

Research and Experiments

Colorado State University psychologist Anne M.Clearly Cleary conducted experiments testing familiarity-based recognition in which participants were given a list of celebrity names. Later on, they were shown a collection of celebrity photographs, some photographs corresponded to the names on the list, other photographs did'nt. The participants were told to identify the celebrities in the photographs and explain how likely it was the celebrity’s names were on the list they had seen previously. Even when the participants were unable to identify a celebrity by photo. That is, they couldn’t identify the source of their familiarity with the celebrity, but they knew the celebrity was familiar to them. These results showed that the participants stored a little bit of the memory, but it was hazy, so they were not able to connect it to the new experience.
Why You Experience Déjà vu! Why You Experience Déjà vu!