Suggest two real-world applications based on the study by Dement and Kleitman (sleep and dreams). Your suggestions must be ethical.

Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

1. 1 mark for what the application is (clearly based on Dement and Kleitman).
2. 1 mark for how it will be achieved.
3. e.g. It can help people with sleep related disorders (1 mark: what). Patients can be attached to an EEG monitor to see if brain waves whilst sleeping are typical or not (1 mark: how).
4. It can be used in therapy involving dream analysis (1 mark: what). Patients can be woken up in REM sleep (via a device that detects REM sleep) and asked to recall the content of their dream immediately (1 mark: how).
5. It can be used to promote better quality sleep (1 mark: what). People can use their watch / sleep app to measure/track sleep/REM time to see if sleep is good or needs 'improving' (1 mark: how).
6. It can be used by a mattress company to see if their mattresses promote good quality sleep (1 mark: what).
7. There are other creditworthy suggestions.