Your age
15to20yearsold
21to30yearsold
What time do you usually go to bed every night?
Befor22:00
22:00～23:00
23:00～24:00
24:00～1:00
After1:00
Do you often delay your expected bedtime for various reasons?
After you decide to go to sleep, how long will it take you to go to sleep?
Within30minutes
30～60minutes
1～2hours
Morethan2hours
What do you think are the main factors that delay your bedtime？
schoolassignment
entertainment
environmentalfactor
workovertime
other
What do you usually do when you can't sleep?
Keepsleeping
playphone
eatsomething
other
What time do you usually get up?
Before6:00
7:00～8:00
8:00～9:00
After10:00
How do you usually wake up in the morning?
Wakeupbyalarmclock
Wakeupbysomeoneelse
Sleepuntilwakeupnaturally
How long do you think the ideal sleep time is?
6～7hours
7～8hours
8～9hours
Morethan9hours
How long do you sleep every night?
Lessthan7hours
7～8hours
8～9hours
Morethan9hours
Do you have the habit of taking a nap?
If you take a nap, how long do you usually sleep?
30minutes
1hours
Morethan1hours
Do you have the habit of drinking tea, coffee or other drinks to refresh yourself?
Do you think your sleep time has an effect on your study?