PTE Retell Lecture真实讲座练习:为什么人类大脑不能做多任务处理

在PTE中,无论是Summarise Spoken Text 还是 Re-tell Lecture的考题大都是从真实的讲座或者演讲中截取的,中间经常经常夹杂很多不同的环境音.很多同学都反映有时未必是听不懂,而是听不到. 鉴于此,墨尔本文波雅思PTE专门为大家总结了真实讲座的PTE练习音频,相比新闻音频来说,整体更加接近PTE考试的真题,内容方面,我们也会为大家提供考试中存在的近似题,最近我们会持续更新,敬请期待!


 

Even though our brains reward this kind of behaviour, even though they make us crave more information, they’re actually not very good at processing information with the intensity, in the quantity, in the speed we find ourselves surrounded by today. And the reason is that our short-term working memory has a very small capacity. Working memory is essentially the contents of your consciousness at any given moment. What you’re aware of is in your working memory, what you’re not aware of is not in your working memory. And you probably remember at least the title of a famous paper that came out I think in the 1950s was called I think the magical number seven. In the author of it said that it looked like we could hold our working memory in our consciousness around seven pieces of information at once and that was the maximum. And the thrust of his paper was, you know, this is a very small store of information. And since then we’ve found that actually that’s an overstatement that our working memory probably can only hold somewhere between two and four pieces of information at any given time. And when we take in too much information at once, what happens inevitably is that we start having this phenomenon where things are coming into and out of our working memory, out into of consciousness really really quickly. Because as soon as you take in a new bit of information through whatever screen you happen to be looking at, some other piece of information your working memory has to leave, has to exit in order to make room for the new piece of information. And when this happens in psychologist, particularly educational psychologists have been studying this, particularly at this phenomenon, particularly as it relates to education for a long time, is you suffer quite literally cognitive overload. You’re overloading your mind, you’re overloading your working memory, and when that happens you’re never paying close attention to anything, you’re never focusing on one thing for an extended period of time. And unfortunately there are all sorts of important intellectual processes that as a result get short-circuited. They never happened because they require us not to take in constant information but the filter out information into focus on one thing.

 

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