jueves, 26 de febrero de 2015

Screen time 'harms teenagers' sleep'


Question 1

a.  False. “Almost all the teens from Norway said they used the devices shortly before going to bed.”
b. True. “Any type of screen use during the day and in the hour before bedtime appeared to disrupt sleep - making it more difficult for teenagers to nod off.
c.True. “Staring at an illuminated screen at bedtime could send the wrong signals to our brain, disrupting our natural body clock making us more alert.”
d True. “Dr Hysing said her findings had implications for the wider population as so many people use these devices.”

Question 2

a. The study was carried out in Norway. The experts asked nearly 10,000 teenagers about the time they spent in front of a screen after school and about how much sleep they got. They found that most of them spent more than four hours a day in front of a screen and that affected their sleep negatively.

b.  Boys spend between six and seven hours mainly in front of a computer playing games, whereas girls spend one hour less and they prefer to chat.

Question 3

a. Linked / to link
b. Slightly
c. To nod off
d. Gadget
e.  Disrupting / to disrupt

Question 4

a.  If teenagers didn’t use electronic devices for (such) long periods, they would get enough sleep.
b.  Empirical evidence is provided by the study and we should warn teenagers of it.
c. Dr. Hysing said that they knew that sufficient sleep was essential for good physical and mental health. Logging off might be one important step toward securing a good night's sleep.

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