Question

    Teenagers who check social media for several hours a day are at the risk ofdeveloping ADHD (多动症), a study has concluded.

The research team, from the University of Southern California, tracked 2,600teenagers aged 15 and 16. They asked them how many times they checked theirphones and other digital devices for various reasons, and then monitored them for symptoms of ADHD. After two years, those who had checked their phones the mostoften were twice as likely as those who checked the least often to show signs ofADHD.

Writing in the JAMA medical journal, the scientists said, “Modern mediadevices immediately inform users when new text messages, social media postings, or videogame play invitations arrive. Exposure to such information may drawattention away from important tasks. Frequent distraction could interrupt thedevelopment of constant attention and organization skills.”

They believe constant access to instant entertainment also has an impact. Researcher Professor Adam Leventhal said all previous research had focused on the link between ADHD and televisions. “What’s new is that previous studies on thistopic were done many years ago, when social media, mobile phones, tablets andmobile apps didn’t exist. We can say with confidence that teens who are exposedto higher levels of digital media are significantly more likely to develop ADHDsymptoms in the future,” he said.

Leventhal believes the findings help fill a gap in understanding how newmobile media devices and seemingly limitless content pose a mental health risk forchildren. And the findings serve as a warning.

British scientists welcomed the findings. But Professor Andy Przybylski of theOxford Internet Institute said, “The study relies on survey responses provided bythe students in question. It is not clear if teachers or parents would rate the childrensimilarly or if the self-reported measure of digital screen use is related with eitheractual behavior or higher quality survey items.”

1.How did the researchers conduct the study?

A.By monitoring 2,600 teenagers with ADHD.

B.By tracking the participants for two years.

C.By analyzing data from previous researches online.

D.By controlling different teens’ time spent on social media.

2.What does Leventhal think of the exposure to higher levels of digital media?

A.It will cause diverse ADHD symptoms.

B.It will create higher ADHD risks.

C.It will weaken teenagers’ confidence.

D.It will have a major influence on organization skills.

3.What does Professor Andy Przybylski think of the study?

A.It provides a better understanding of the media.

B.It should have focused on parents’ responses.

C.Its findings are not reliable enough.

D.It’s a breakthrough in this field.

4.What can be a suitable title for the text?

A.The use of digital media is on the rise

B.Teens are increasingly exposed to ADHD

C.Heavy use of social media may increase ADHD risks

D.Teens’ exposure to modern media calls more attention

Answer

1.B

2.B

3.C

4.C

【解析】

这是一篇说明文。主要叙述了一项研究表明，每天花几个小时查看社交媒体的青少年有患多动症的风险这一发现展开。研究人员通过对参与者进行了为期两年的追踪得出了这一发现。科学家指出频繁的分心会阻碍持续的注意力和组织能力的发展。而两位教授Adam Leventhal和Andy Przybylski就此发现表达了自己的看法。

1.细节理解题。根据第二段最后一句After two years, those who had checked their phones the most often were twice as likely as those who checked the least often to show signs of ADHD. 两年后，那些经常查看手机的人出现多动症症状的几率是那些不经常查看手机的人的两倍。由此可知，研究人员对参与者进行了为期两年的跟踪来进行这项研究的，故选B。

2.推理判断题。根据第四段最后一句We can say with confidence that teens who are exposed to higher levels of digital media are significantly more likely to develop ADHD symptoms in the future可知Leventhal认为频繁接触数字媒体的青少年在未来更有可能出现ADHD症状。由此判断出频繁接触数字媒体会增加ADHD的风险。故选B。

3.推理判断题。根据文章最后一句It is not clear if teachers or parents would rate the children similarly or if the self-reported measure of digital screen use is related with either actual behavior or higher quality survey items.可知Andy Przybylski认为目前尚不清楚老师或家长是否会对孩子做出类似的评价等，由此判断出他认为这项研究的发现不够可靠。故选C。

4.主旨大意题。根据第一段Teenagers who check social media for several hours a day are at the risk of developing ADHD (多动症), a study has concluded. 一项研究表明，每天花几个小时查看社交媒体的青少年有患多动症的风险。以及文章主要内容围绕一项研究表明，每天花几个小时查看社交媒体的青少年有患多动症的风险这一发现展开。所以短文最佳标题为“过度使用社交媒体可能会增加患多动症的风险”。故选C。