TPO61听力Lecture1原文+MP3+题目+答案下载

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TPO61听力Lecture1原文+MP3+题目+答案下载

TPO61听力Lecture1原文：

listen to part of a lecture in a sociology class.

sociology is really a cross disciplinary field. we find that elements of biology, psychology, and other sciences often overlap as we study particular phenomena. so let me introduce a concept from cognitive psychology. okay? Let's say someone asks you to look at a list and memorize as many items on it as he can. most of us are able to remember, on average, seven items. there are several variations of this memory test. And the results consistently show that the human limit for short term memory is seven bits of Information. this limit is called channel capacity. shadow capacity is the amount of Information that can be transmitted or received over a specific connection, like our brain and the channel capacity.

For our short term memory. It has some interesting real life implications, like phone numbers. local numbers here in the united states all have seven digits, because the phone companies realized early on that longer numbers would lead to a lot more wrong numbers being dialed. but the idea of channel capacity doesn't apply just to our cognitive abilities. it also affects our relationships with people around us. psychologists talk about sympathy groups. These are the people, close friends, family to whom we devote the most time. we call or see them frequently. We think about them, worry about them. And studies show for each of us, the size of that group is about 10 to 15 people. but why so small? sure. Relationships take time and emotional energy. And most of us don't have unlimited amounts of either. but what if there's another reason? what if it's our brain that setting the limit?

。。。。此处省略1000字！

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