Sleep, Wake and Light Therapy for Depression

Participants will be helped to change the pattern sleep by depriving participants of sleep for one night. On Day 1 participants will be supported to stay up all night and the following day at the Hospital. Participants can go to bed by 5pm at home on Day 2. Participants will need to get up by about 1am and return to the hospital to be supported to stay awake. Participants will then go to bed at 7pm on Day 3. Participants will be asked to sleep until 3am and then stay awake at home until bed at 9pm on Day 4. Participants will then get up by 5am on Day 5 and stay awake until 11pm to resume a normal sleep routine waking by 7am on Day 6. Participants will also be given a light box to use each morning. For the light box, participants will be asked to sit about one foot away from a light box. You will be free to have breakfast, read or use a computer while facing towards the light. Treatment with a light box will last 30 minutes. Participants may continue to have treatment as usual.

Participants will be given information and advice on how to get a good night's sleep. Participants will be also given a light box to use in the morning for 1 week. For the light box, participants will be asked to sit about one foot away from a light box. Participants will be free to have breakfast, read or use a computer while facing towards the light. Treatment with a light box will last 30 minutes when you get up. Participants may continue to have any treatment as usual (for example medication or talking therapies).