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What is the discussion mainly about? According to the professor, what has modern neuroscience revealed about human vision?
What is the discussion mainly about? According to the professor, what has modern neuroscience revealed about human vision?
admin
2022-09-29
80
问题
What is the discussion mainly about?
According to the professor, what has modern neuroscience revealed about human vision?
Listen to part of a discussion in an art history class. (P = Professor, S = Student)
P: So, we just got started with the French painter Paul Cezanne in our last class. He created most of his paintings in the late 19th century, although in many ways, his work is a culmination of the impressionist movement that began several decades earlier, the movement that was spurred, in part, by the growing popularity of photography.
S: But, didn’t artists, painters, feel threatened by photography?
P: They did. And that’s one of the reasons painters of the mid to late 19th century worked so hard to distinguish their paintings from the types of images that were captured in photographs. Here is one argument they used: they argued that the camera could only capture a single moment in time, but for them, that wasn’t how people actually perceive reality. "Our perception of reality is not a snapshot. It’s formed over time." they’d say. So, the techniques these painters used to suggest the passing of time moved away from the conventional techniques of realistic representation. You know, sharp details, sharp outlines. Outlines of objects in their paintings became increasingly blurred and they experimented with color to create mood. That painting titled Impression, Sunrise that we discussed a few classes ago was a good example. It is the one with the harbor scene, where there was a sense of time passing of the day just from the awakening. The colors ran into one another. There were no real distinctions between objects. The viewer got a sense of the play of light, of surfaces, shimmering. This blurring of outlines became the signature of this new style of painting. David?
S: This kind reminds me of something I read in a book recently about Cezanne and the blurring of the outlines and the process of sight. I think it was…
P: Urn, I know which book you are talking about and I’m not sure I… though it does certainly fit in with what we are talking about. Let me explain a bit about the book to the class. Now, remember what I said about the impressionist movement leading up to Cezanne? Well, Cezanne took the technique of blurring outlines even further. His paintings, particularly the later ones, lack boundaries. They are more abstract. They consist of patches of color that blend into one another and you can hardly tell what the objects are. Now, the author of the book that David’s talking about proposed that there is a connection between Cezanne’s style and the way our visual perception works in general. Modern neural science tells us that visual perception is basically a two-stage process. Information at the human eyes initially transmitting to the brain is this pretty disorganized bunch of lines and patches of color. That’s the first stage. But in the next stage, the brain processes this blurred and somewhat chaotic image to create the final picture of sharp outlines and distinct objects. This, of course, all happens automatically and we are only aware of the final result. But this book argued that Cezanne somehow intuited that before the final sharp images formed, there is this stage where colors and lines are blurred and that’s what he represented in his paintings. Mind you, he supposedly did this decades before scientists actually understood this process.
S: So Cezanne just gives us the initial chaotic impression and it’s up to our brains to make meaning out of what our eyes see.
P: Right, that’s what the book argues. Cezanne somehow understood that that’s how our vision worked.
S: So Cezanne with this abstract style is simply forcing us to go through the same process of making sense of what we see as a… as the process that the brain goes through to make sense of the information it receives from the eyes. It seems like a pretty strong case to me.
P: Well, you can certainly make the argument, but to me, it’s a stretch. You see, this two-stage process happens automatically in our brains. I mean, how could Cezanne be aware of this. I think it’s simply the case of Cezanne just continuing the tradition of this new painting style that did away with outlines and experimenting with it to see how far he can take it and what kind of visual experience it would give the viewer. To me, that doesn’t make him a neural scientist.
选项
A、Artists often process visual images differently than other people do.
B、The brain has difficulty processing visual images that are too chaotic.
C、The eye functions like a camera that sends exact images to the brain.
D、Images of sharply outlined objects are a result of brain processing.
答案
D
解析
题目询问根据教授所说,现代神经科学揭示了人类视觉的哪个方面。讲座中提到,现代神经科学告诉我们视觉感知一般有两个阶段:第一阶段是人类眼睛中的信息先给大脑传递一堆杂乱无章的线条和色块;第二阶段是大脑将这些模糊而混乱的图像,处理成有着清晰轮廓的成像。由此可见,D项“轮廓鲜明的物体的图像是经大脑处理后的结果”符合视觉感知第二阶段的情况,故选。讲座中没有对比艺术家和普通人处理视觉图像的方式,可排除A项“艺术家处理视觉图像的方式和其他人不同”。视觉感知的第二阶段就是大脑处理混乱的视觉图像信息,可知B项“大脑很难处理太混乱的视觉图像”错误。在视觉感知的第一阶段,眼睛传递给大脑的信息是杂乱无章的线条和色块,故C项“眼睛的功能就像照相机,它把精准的图像传送到大脑”错误。
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