Nia attended a 14-night residential astronomy course where observations continued late into the night. Her sleep records are shown in the table.
| Period | Mean time Nia went to bed | Mean time Nia fell asleep |
|---|---|---|
| 14 nights before the course | 22:30 | 22:45 |
| Final seven nights of the course | 01:45 | 02:00 |
| First seven nights after returning home | 22:30 | 01:40 |
After the first seven nights at home shown in the table, Nia begins spending time in bright daylight at 07:00 every morning.
Using the information in the table, outline how Nia's body clock could account for her sleep onset insomnia after the course. Include how her sleep onset is likely to change after she begins receiving bright daylight every morning.
53 exam-style questions on OCR GCSE Psychology 6.1 Key Concepts, covering 6.1.1 Functions, features and benefits of sleep, 6.1.2 Causes of sleep disorders, and 6.1.3 Endogenous pacemakers and exogenous zeitgebers. Each one has a worked solution and a mark scheme showing where the marks go.