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
2015-05-24
34
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 maryuana 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."
It can be inferred from the last paragraph that social network may
选项
A、connect people but not their health behavior.
B、result in the mutual reinforcement of poor sleep and drug use.
C、be a very useful tool to tease out all logical relations.
D、help find the relation of poor sleep and gambling.
答案
D
解析
推理判断题。最后一段第二句指出,美德尼克希望找出睡眠与赌博是否存在一定的关联;第三句接着讲,研究小组的成员认为人际关系网是梳理因果关系的有力工具,由此推断人际关系网可以帮助找到睡不好和赌博之间是否存在联系,所以D项正确。
转载请注明原文地址:https://kaotiyun.com/show/DN74777K
0
考研英语一
相关试题推荐
EveryonecomplainsthatcorporateAmericais【C1】______tohireadditionalworkers.Far【C2】______attentionhasbeenpaidtothefl
AccordingtoarecentGallupWorldPoll,1.1billionpeople,orone-quarteroftheearth’sadults,wanttomovetemporarilytoa
TheOnlineAutocarLeasingBusinessWheneBay,nowtheworld’sbiggestauctionwebsite,wentonlinein1995.manyexpectedi
AmericanPrivateClinicsTransformTowardtheMedicalInstitutionsAquietrevolutionistransforminghowmedicalcareisde
TheReformofSchoolMealsinAmericanSchoolsKidswillalwaysgrabpizzaanddessertintheschoollunchline,butthosei
TheSocialChangesTransformedToday’sGrandparentsThegrandhasbeentakenoutofgrandparent,leavinggrandparentswitha
TheAccountabilityofEducationFailureIhaveanunclewhowasforyearsaChicagopublicschoolteacher.Passionateandar
YouwillgraduatefromPekingUniversitythisyearandhavemadeadecisiontostudyabroad.WritealettertoaUSuniversityy
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareaissufficie
[A]Globalclimatechange—averagetemperatureshaverisenbyroughly0.6degreeCelsiussincethebeginningofthe20thcentury—
随机试题
公安机关要有力地防范和打击敌对势力、敌对分子的破坏活动,积极防范和严厉打击各种严重刑事犯罪,尤其是经济领域的严重犯罪活动。()
超声波是由波源振动而产生,其振动最低频率必须超过
中国人李某(女)与甲国人金某(男)2011年在乙国依照乙国法律登记结婚,婚后二人定居在北京。依《涉外民事关系法律适用法》,关于其夫妻关系的法律适用,下列哪些表述是正确的?(2013年卷一77题)
避开直接发行股票与债券的法律要求,上市手续简单、发行成本低是存托凭证对投资者的优点。()
下列各表述错误的是()。
有下列SQLSELECT语句:SELECT*FORM成绩表WHERE物理BETWEEN80AND90下列与该语句等价的()。
Peoplearesurroundedbyadvertisingandthereisanincreasingeffectonourlives.Doyouthinkthepositiveeffectsoutweigh
A、2yearsB、10yearsC、20yearsD、5yearsB
Inthe1990s,MicrosoftInternetExplorerbattledNetscapeNavigatorinthegreatWebbrowserwars.Inthe2000s,GoogleandYah
A.necessityB.hangingonC.periodD.improvingE.haltedF.botheredG.reasons
最新回复
(
0
)