科學(xué)一刻 三歲會是什么樣？
Children have a hard time remembering certain things, why is that?
Most people will agree they cannot remember much, if anything, prior to around age four. What is remembered often comes in “spot” images, floating in an otherwise gray area of uncertainty. Yet when we look at a two or three year-old, perception and basic cognition appear to be in place and to have been functioning for a good long while. Why are those years lost to us?
One possibility is that memory in humans requires a narrative context. “Narrative context” means that it isn’t enough to provide, say, a random visual image to the brain in order for it to form a working memory: the image needs to be put in place alongside a number of other images, with which it helps to establish a pattern. The very first time you see a tree, your brain can’t do anything with it yet — the information may simply be stored until it can be connected to other things, such as the back yard where you saw it, its size and color, or events of significance that occurred at the same time. Once enough relationships are in place, it then becomes possible to remember — not just “tree” as an abstraction, but “the big green tree I saw when I was walking this morning behind the house.”
Learning words probably aids in this process, but is not strictly necessary. Still, the brain may provide context for memories by telling itself miniature stories, complete with setting, characters, and relationships. According to this idea, early childhood events occur at a time before we have developed enough narrative skills to tell the stories necessary for the formation of memories. No narrative context, no long-term memory–end of story.
