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
Parents looking to steer their teens away from drugs may want to encourage them stay in bed longer. Lack of sleep seems to lead
Parents looking to steer their teens away from drugs may want to encourage them stay in bed longer. Lack of sleep seems to lead
admin
2015-10-20
57
问题
Parents looking to steer their teens away from drugs may want to encourage them stay in bed longer. Lack of sleep seems to lead to increased drug use—not the other way around, as many researchers previously concluded—and this is likely to be a pattern of behaviour that teenagers acquire from their friends.
Establishing whether one behaviour leads to another usually requires an experiment in which a particular variable is controled. But in the first analysis of its kind, Mednick and her team used changes in the friendship networks of 90,000 teens during the course of a school year as a "natural experiment" to discover what influences led them to use cannabis. They say their analysis showed not only that cannabis and poor sleep spread together, but also that lack of sleep was causing marijuana use.
Having one friend who had less than 7 hours of shut-eye a night increased the likelihood that a teenager had also used marijuana by 20 per cent, the team found. Also, the more sleep-deprived friends the teenager had, the more likely it was that he or she smoked dope. The team also found that the most popular teenagers were the ones most likely to sleep poorly, do drugs and pass these behaviours on.
To reduce the possibility that a shared environmental factor may explain these connections, Med-nick’s team took into account differences between teenagers, including race, sex, parents’ income and education. Another complication is that teenagers tend to pick friends based on a mutual interest, be it football or French or recreational drug use.
But Mednick says that the pattern of changes in the social networks show the teens are not simply picking like-minded friends, but that friends are driving each other’s behaviour. Mutual friends had more influence on the sleep habits and drug use of one another than pairs where only one person named the other as a friend. Teens whose friendship was not mutually felt by a classmate they named had little or no effect on that friend’s behaviour.
Susan Tapert, a psychologist also at UC San Diego who was not involved in the study, agrees that poor sleep may lead to drug use, but also says the two behaviours probably reinforce one another. Mednick hopes to use a similar approach to find out if sleeping badly is related to gambling and other impulsive acts. Team member James Fowler sees social networks as a useful tool for teasing out cause and effect. He and Mednick write: "People are connected, and so their health behaviours are connected."
Which of the following is true according to Paragraph 3?
选项
A、Teens having friends who lack sleep are more likely to use drug.
B、The more friends teenagers have, the more likely they are to use drug.
C、The most popular teenagers sleep poorly but do not use marijuana.
D、The most popular teenagers are those who pass their good behaviours on.
答案
A
解析
事实细节题。第三段第一、二句提到,有朋友睡眠不足,青少年吸毒的可能性会上升,而且睡眠不足的朋友越多,吸毒的可能性越大,所以A项正确。
转载请注明原文地址:https://kaotiyun.com/show/FtzZ777K
0
考研英语一
相关试题推荐
What’syourearliestmemory?Doyourememberlearningtowalk?Thebirthofasibling?Nurseryschool?Adultsrarelyrememberev
Realpolicemen,bothBritainandtheUnitedStateshardlyrecognizeanyresemblancebetweentheirlivesandwhattheyseeonTV—
On-lineServiceTwitterInSeptember2008,Twitterco-founderBizStonesaidthecompanynevermettohammeroutbusinessmo
InPlato’sUtopia,herearethreeclasses:thecommonpeople,thesoldiers,andtheguardianschosenbythelegislator.Themain
Assummerrollsaround,lawmakersinWashingtonarepreparingtovoteonajobsbillthatwouldinclude$1billionforsummerjo
InOctober2002,GoldmanSachsandDeutscheBank(1)_____anewelectronicmarket(www.gs.com/econderivs)foreconomicindicest
InOctober2002,GoldmanSachsandDeutscheBank(1)_____anewelectronicmarket(www.gs.com/econderivs)foreconomicindicest
Whenadiseaseofepidemicproportionsthreatensthepublic,scientistsimmediatelygettowork,tryingtolocatethesourceof
[A]DrDanielStanley,anoceanographer,hasfoundvolcanicshardsinEgyptthathebelievesarelinkedtotheexplosion.Comput
Twenty-sevenyearsago,EgyptreviseditssecularconstitutiontoenshrineMuslimshariaas"theprincipalsourceoflegislation
随机试题
治疗泄泻足三里配公孙的作用为
家畜的肺分为左肺和右肺。而右肺
左室舒张功能评价参数包括
患者,男性,28岁。8年来站立或腹压增高时反复出现右腹股沟肿物,平卧安静时肿块明显缩小或消失。10小时前因提重物而肿块又出现,伴腹痛、呕吐,肛门停止排气和排便。体检示右阴囊红肿,可见一梨状肿块,平卧后肿块不消失。本例患者最有效的治疗措施是
工程测量中,一般采用激光铅直仪的精度是()。
某公司现有甲、乙、丙、丁四个投资项目,它们之间是独立关系。经财务人员评价.甲项目净现值为50万元,乙项目净现值率为12%,丙项目的内部收益率为60%,丁项目包括建设期的静态投资回收期为3年。则可以肯定公司会采纳的投资项目是()。
我国在与世界各国和地区发展对外经济关系、扩大对外贸易、吸收和利朋外资、发展对外技术交流时,必须坚持的一个共同原则是()。
根据党的十九大报告内容,下列说法正确的是()。
赵某于2013年6月失踪,2017年8月,法院根据赵某妻子的申请依法宣告赵某死亡。2018年3月,赵某重返家中,2018年4月,人民法院依赵某申请撤销对其本人的死亡宣告。下列对赵某婚姻关系描述正确的是()。
在建设中国特色社会主义的新时期,我国社会主义道德建设的核心是()
最新回复
(
0
)