首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Globally, 10. 6 percent of people are left-handers, while the remaining 89. 4 percent are righthanders. While it is widely assum
Globally, 10. 6 percent of people are left-handers, while the remaining 89. 4 percent are righthanders. While it is widely assum
admin
2021-09-25
63
问题
Globally, 10. 6 percent of people are left-handers, while the remaining 89. 4 percent are righthanders. While it is widely assumed that handedness is influenced by both genetic and environmental factors, it is still not well understood why some people become left-handed and others become right-handed.
One longstanding hypothesis proposed in 1973 by Paul Satz, an American psychologist, and one of the founders of the discipline neuropsychology, is that the circumstances surrounding birth could affect handedness. It has been suggested that being born extremely early or under very stressful conditions could raise the chances of being left-handed—the so-called " early insult" hypothesis for left-handedness. This theory assumes that early brain damage caused by birth complications could lead to a switch in handedness. As there are more people who are initially right-handed, there would be more "pathological" left-handedness than "pathological" right-handedness caused by this switch. Thus, the theory would assume that having problems with birth would result in a higher amount of brain damage and a higher chance of being left-handed.
But is this really the case? While previous studies have often investigated the link between birth complications and handedness, I think they often neglected to also obtain brain scans in order to assess whether or not there was any brain damage. A new study by Van Heerwaarde from the Netherlands in 2020 now investigated whether being born extremely preterm affects handedness.
In the study, the scientists evaluated handedness at school age (4-8 years) in 179 children that were born extremely preterm. The mean gestational age of the children was 26. 5 weeks, compared to 38-42 weeks in full-term born babies. The handedness assessment showed that in the children that were born extremely preterm 19. 6 percent were left-handers, 3. 4 percent were mixed-handers and the remaining 77. 1 percent were right-handers. This indicates that there were more lefthanders and mixed-handers among children that were born extremely preterm than among children that were born full-term (in the general population, 89.4 percent of people are right-handers).
But were left-handedness and mixed-handedness linked to brain damage? Importantly, the authors obtained brain scans to assess brain damage. The scientists used magnetic resonance imaging to find out. Their brain scans showed that overall about 47 percent of preterm-born children showed one or more lesions in the brain, which is substantially more than in full-term born babies. However, there was absolutely no statistical link between left-handedness and mixed-handedness and brain damage. The scientists then used another type of brain scan to assess damage in the white matter of the brain. Again, absolutely no relation to handedness was found.
Taken together, the study by Van Heerwaarde (2020) clearly shows that left-handedness and mixed-handedness are more common in children that were born extremely preterm than in children that were born full-term. Moreover, they also show that it is highly unlikely that brain damage causes left-handedness as no relation between handedness and brain damage was found. This suggests that other factors linked to being born extremely preterm are likely affecting handedness.
What is the flaw in previous studies according to the author?
选项
A、They provide false data on birth complications.
B、They do not explore the effect of preterm birth on handedness.
C、They do not apply reliable means to ascertain brain damage.
D、They conclude that most children of left-handed parents are right-handed.
答案
C
解析
细节题。根据题干关键词previous studies定位到第三段。作者认为虽然以前的研究经常调查生产时出现的问题和用手习惯之间的联系,但作者认为他们经常忽略了用脑部扫描来评估婴儿是否有任何脑损伤,也就是说在作者看来,之前的研究者没有使用脑部扫描的技术来确定研究对象是否有脑损伤,这是不严谨的,因此答案选[C]。[A][B][D]都是无关选项,在文中均没有提及。
转载请注明原文地址:https://kaotiyun.com/show/s71Z777K
0
考研英语一
相关试题推荐
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,【C1】______this
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
TheethicaljudgmentsoftheSupremeCourtjusticeshavebecomeanimportantissuerecently.Thecourtcannot【C1】______itslegit
Asmanypeoplehitmiddleage,theyoftenstarttonoticethattheirmemoryandmentalclarityarenotwhattheyusedtobe.We
Asmanypeoplehitmiddleage,theyoftenstarttonoticethattheirmemoryandmentalclarityarenotwhattheyusedtobe.We
Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousins,sharingabout1%ofgenes.Thatis【C1】______astudy
"MoneyMattersonCampus"isarecentlyreleasedstudyonfinancialliteracyamongyoungadults.Itsupportsprovidingstudents
AwaronsugarhasbegunintheUKthatechoesthenation’ssuccessfulcampaignagainstsalt.Theeffortis【C1】______becauseit
SupposeyouhaveinvitedLauratoyourbirthdayteaparty.Butthereissomeemergencyandyouhavetocanceltheparty.Writeh
随机试题
某甲将自己的花盆放在三楼办公室办公桌上,因公外出期间,某乙将其花盆移放窗外未摆稳,花盆被风吹落,砸伤楼下行人丙,致其花掉医药费200元。此医药费应当由谁承担______。
位于澳门特别行政区的宝华有限责任公司与上海市明珠有限责任公司就一项办公软件购销合同产生纠纷,并在内地人民法院进行诉讼,关于审理此案过程中文书的送达和相关证据的调查,下列说法正确的是:()
按照现行消费税制度规定,生产企业下列行为中,不征收消费税的有()。
杨女士于年初跳槽到一家跨国公司。该跨国公司为外企,杨女士认为在外企工作有很多不确定的因素,以后的生活也可能会很不稳定。所以杨女士开始考虑是否从现在开始规划自己的退休养老生活比较好。根据以上材料回答问题。理财师建议杨女士现在就开始为自己的退休养老进行投
下列有关票据伪造的表述中,不符合票据法律制度规定的有()。
作为一种力量,文化力不是一种直接作用的力,其显现发挥必然是通过一定的载体或媒介,要么是存在于人们的思想观念或是精神理论上,要么是物化在一定的物质产品或精神产品上。只有通过精神的或者物质的载体,文化力才有真实的存在。也就是说,文化力并不是那种立竿见影式的显在
公众是否应该在电视当中收看到真实的法庭审判?有国外学者认为,人们在电视中收看庭审,不是因为他们关心国家有效推行司法制度运作的能力;相反.他们要看的是目击证人作证的戏剧性效果——追求娱乐性。因此,应当把摄像机移出法庭。免得公众把法律体系当成情景喜剧的脚本。以
避免死锁的一个著名的算法是(6)。
以下程序的输出结果是______。#include<stdio.h>#defineSQR(x)x*xmain((){inta,k=3;a=++SQR(K+1);printf("%d\n",A);}
Abouttwoweeksago,theU.S.DepartmentofHealth’sSubstanceAbuseandMentalHealthServicesAdministration(SAMHSA),reporte
最新回复
(
0
)