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
78
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."
The changes in the social networks show that teens and their friends
选项
A、do not share mutual interest.
B、affect each other’s behaviour.
C、are different from each other.
D、have the same sleep habits.
答案
B
解析
推理判断题。根据题干中social networks定位到第五段首句,该句提到青少年人际关系网的变化表明,他们选择志趣相投的人做朋友,还相互影响彼此的行为,可推知B项正确。
转载请注明原文地址:https://kaotiyun.com/show/xN74777K
0
考研英语一
相关试题推荐
Inthe1960spopwasayoungperson’sbusiness.Buttodayageisnobarriertosuccess.TheRollingStonesarestilltouringin
Inthe1960spopwasayoungperson’sbusiness.Buttodayageisnobarriertosuccess.TheRollingStonesarestilltouringin
Writeanessaybasedonthefollowingtable.Inyourwriting,youshould1)describethetable,and2)giveyourcomments.Yousho
TheFluVirusCannotBeForeseenThereisajokeamongfluresearchers:"Ifyou’veseenonefluseason,you’veseen...o
PoorPeopleAlsoCanHaveaLawsuitinAmericanAmerica’scourtsarebuiltonasystemofrulesandproceduresthatassumet
AboutPainPain,unfortunately,isahorriblenecessityoflife.Itprotectspeoplebyalertingthemtothingsthatmightin
Istheprofessionalbookreviewerold-fashioned?InarecentHarvardBusinessSchoolstudyofnonfictionreviews,assessmentsin
Istheprofessionalbookreviewerold-fashioned?InarecentHarvardBusinessSchoolstudyofnonfictionreviews,assessmentsin
Achemicalplantshouldberesponsibleforthewaterpollutioninanearbyriver.WritealettertotheCityEnvironmentProtect
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareaissufficie
随机试题
男孩,5岁,患有结核病,但结核菌素试验阴性,可能是
崔某认识在某国有银行支行营业厅工作的甲、乙,说服二人在他们值班时由崔某前去营业所假装抢劫,所得款项由三人均分。甲、乙表示同意。等到甲、乙值班的时候,崔某拿着一把发令枪冲进营业厅,用枪指着两人,要甲、乙交出钱来。两人假装很害怕,将预先准备好的30万元人民币
对现金周转期理解正确的是()。
恶性淋巴瘤累及颈、腹股沟淋巴结,肝及肺,并伴有发热、盗汗及体重减轻,临床分期属()。
身体成分是指人体总体重非脂肪成分与脂肪成分的比例,它可以粗略地评价人体的胖瘦状况。()
阅读下列材料,回答问题。党的十八大以来,新一届政府取消和下放了多项行政审批事项,为企业“松了绑”、为群众“解了绊”、为市场“腾了位”,也为廉政“强了身”,极大激发了市场活力和社会创造力。在国内外经济形势严峻复杂、国内传统动能减弱的情况下,没有搞强
Unlesswespendmoneytospotandpreventasteroids(小行星)now,onemightcrashintoEarthanddestroylifeasweknowit,saysome
________服务是目前因特网上使用最频繁的一种服务,它在国际之间的交流中发挥着重要作用。
显示或打印汉字时,系统使用的是汉字的()。
A、SheispoorinEnglish.B、Shecan’tspeakEnglish.C、Shehastheabilitytoactinaplay.D、Shedoesn’tliketospeakEnglish
最新回复
(
0
)