Many of us have already seen the movie Inception and might have been shaken with its fantastic plot. Planting nonexistent memories into someone's brain, that sounds great, isn't it? Yet scientific evidence in memory shows that it can be real in some certain circumstances.
Researchers found that using suggestive memory techniques can strongly encourage people to recall memories, even creating memories that they might have never really experienced. In one study, researchers using different verbs like "contacted", "collided", and "smashed" to describe the same video of a car accident to different people letting them estimate the car's speed. And the more severe the word researchers use to describe the accident, the higher speed the participants tend to estimate, even the video of this accident is exactly the same. 
In another study, researchers asked participants questions that contain misinformation-- in this case, they suggested that there's a stop sign while actually there's not-- about some details in a car accident video tape. Participants who had been asked such misleading questions generally had some false memories about the detail, which is their memory of a stop sign, while those participants who didn't receive such information mostly recalled the exactly sign correctly. 
According to scientific theory, this can be due to misinformation effect, which is the creation of fictitious memories by providing misleading information about an event after it takes place. Evidence also shows that memories that are more acceptable by our rational reasoning are more easily to be planted in. For instance, having experienced a hot-balloon trip with family members in childhood is more rationally acceptable than experiencing physics professor dancing in a Golden Gopher custom, thus is much more easily to be planted. It seems that what the movie shows can be real in life if the planning is elaborate enough, but that will associate with ethical issues and there'll be long lasting debates to go.
Inception will someday be real!
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