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Speaking two languages rather than just one has obvious practical benefits in an increasingly globalized world. But in recent ye
Speaking two languages rather than just one has obvious practical benefits in an increasingly globalized world. But in recent ye
admin
2014-05-25
44
问题
Speaking two languages rather than just one has obvious practical benefits in an increasingly globalized world. But in recent years, scientists have begun to show that the advantages of bilingualism are even more fundamental than being able to converse with a wider range of people. Being bilingual, it turned out, makes you smarter. It can have a profound effect on your brain, improving cognitive skills not related to language and even shielding against dementia(痴呆)in old age.
This view of bilingualism is remarkably different from the understanding of bilingualism through much of the 20th century. Researchers, educators and policy makers long considered a second language to be an interference, cognitively speaking, that hindered a child’s academic and intellectual development.
They were not wrong about the interference: there is ample evidence that in a bilingual’s brain both language systems are active even when he is using only one language, thus creating situations in which one system obstructs the other. But this interference, researchers are finding out, isn’t so much a handicap as a blessing in disguise. It forces the brain to resolve internal conflict, giving the mind a workout that strengthens its cognitive muscles.
The collective evidence from a number of such studies suggests that the bilingual experience improves the brain’s so-called executive function — a command system that directs the attention processes that we use for planning, solving problems and performing various other mentally demanding tasks. These processes include ignoring distractions to stay focused, switching attention willfully from one thing to another and holding information in mind — like remembering a sequence of directions while driving.
Why does the tussle between two simultaneously active language systems improve these aspects of cognition? Until recently, researchers thought the bilingual advantage stemmed primarily from an ability for inhibition that was honed by the exercise of suppressing one language system: this suppression, it was thought, would help train the bilingual mind to ignore distractions in other contexts. But that explanation increasingly appears to be inadequate, since studies have shown that bilinguals perform better than mono-linguals even at tasks that do not require inhibition, like threading a line through an ascending series of numbers scattered randomly on a page.
The key difference between bilinguals and monolinguals may be more basic: a heightened ability to monitor the environment. "Bilinguals have to switch languages quite often — you may talk to your father in one language and to your mother in another language," says Albert Costa, a researcher at the University of Pompea Fabra in Spain. "It requires keeping track of changes around you in the same way that we monitor our surroundings when driving." In a study comparing German-Italian bilinguals with Italian monolinguals in completing monitoring tasks, Mr. Costa and his colleagues found that the bilingual subjects not only performed better, but also did so with less activity in parts of the brain involved in monitoring, indicating that they were efficient at it.
The bilingual experience appears to influence the brain from infancy to old age, and there is reason to believe that it may also apply to those who learn a second language later in life.
According to the passage, the more recent and old views of bilingualism differ mainly in ______.
选项
A、its practical advantages
B、its role in cognition
C、perceived language fluency
D、its role in medicine
答案
B
解析
本题询问关于双语能力的新旧看法中最大的不同之处。第1段第2句指出近年的科学研究有了新发现:除了实际好处,双语的优势更多地体现为让人更聪明(smarter),对大脑产生深远的影响,提高与语言无关的认知能力(cognitive skill)等,这些均属于认知的范畴。而第2段首句中的This view of bilingualism指代的正是上述内容,该句说这观点与20世纪的观点显著不同,即题干所问内容,故B“在认知领域的角色”符合文意。
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