Please note that the following "fall asleep" refers to [turning off the lights, lying on the bed, and preparing to fall asleep], not the actual sleep time.
What time do you think going to bed (or falling asleep) is considered staying up late?
In a week, how many days do you fall asleep before 12.00 am:
In a week, how many days do you fall asleep between 12.00 am to 2.00 am:
In a week, how many days do you fall asleep after 2.00 am:
Why did you choose to stay up late?
In your opinion, what are the harmful causes of staying up late?
In your opinion, what methods can effectively reduce staying up late:
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