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
74
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."
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 network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/GtzZ777K
0
考研英语一
相关试题推荐
OurculturehascausedmostAmericanstoassumenotonlythatourlanguageisuniversalbutthatthegesturesweuseareunderst
Whatisthemainideaofthefirstparagraph?Bysaying"Thebenefitsarenottobesneezedat"(Line1,Paragraph4),theautho
InOctober2002,GoldmanSachsandDeutscheBank(1)_____anewelectronicmarket(www.gs.com/econderivs)foreconomicindicest
InOctober2002,GoldmanSachsandDeutscheBank(1)_____anewelectronicmarket(www.gs.com/econderivs)foreconomicindicest
Whenadiseaseofepidemicproportionsthreatensthepublic,scientistsimmediatelygettowork,tryingtolocatethesourceof
ToliveintheUnitedStatestodayistogainanappreciationforDahrendorfsassertionthatsocialchangeexistseverywhere.Te
[A]DrDanielStanley,anoceanographer,hasfoundvolcanicshardsinEgyptthathebelievesarelinkedtotheexplosion.Comput
[A]DrDanielStanley,anoceanographer,hasfoundvolcanicshardsinEgyptthathebelievesarelinkedtotheexplosion.Comput
[A]DrDanielStanley,anoceanographer,hasfoundvolcanicshardsinEgyptthathebelievesarelinkedtotheexplosion.Comput
GoingonlineisafavoritepastimeformillionsofAmericanchildren.Almost10million(14percent)ofAmerica’s69millionchild
随机试题
肺下叶后基底段支气管扩张应采用的引流体位为()。
目前用CAD/CAM技术最适宜制作下列哪类修复体
注射法的适应证是枯痔钉疗法的适应证是
《国际伦理纲领、职业行为标准》从总体上对投资分析师提出的基本要求包括()。
该求助者的核心症状是()。根据该求助者EPQ测验结果,其高级神经活动类型为()。
下列不属于信息的是()。
在探讨情绪(积极情绪、中性情绪、消极情绪)、活动性质(丰富、单调)、估计方式(对正在发生的事件的评估、事后回忆)对时间估计的影响的一项研究中,其实验处理有
以下哪个配制,只须加上一枝海棠,就可成为一件合格的插花?以下哪项配制,如果加到一件由四枝海棠和两枝苍兰所构成的不合格配制中,能成为一件合格配制?
软件按功能可以分为:应用软件、系统软件和支撑软件(或工具软件)。下面属于应用软件的是______。
按操作系统的分类,UNIX操作系统是()。
最新回复
(
0
)