Question pretext
Now I would like to ask you questions about what you did yesterday. I want you to try to remember the sequence of activities that you did from when you woke up until when you went to sleep last night.
I will start by asking you what you did in the morning yesterday, and you should just give me a short description. Then I will ask about the afternoon and then the evening.
Literal question
At what time did you go to sleep yesterday?
Interviewer instructions
INTERVIEWER: If respondent can't remember, get his or her best guess.