Testing how light at night affects sleep, alertness, and mood
Part of Brain & nervous system, Mental health clinical trials.
This study looks at how exposure to artificial light changes sleep, daytime alertness, thinking skills, mood, and the body’s daily (circadian) rhythm. You may be asked to follow a strict sleep schedule and avoid certain substances so researchers can measure changes.
Summary written for real people, not researchers, by Clin2.
Who can take part
- Be between 18 and 40 years old (men or women)
- Have a BMI between 17 and 30 (a general weight range)
- Be generally healthy after a medical and psychological screening, including blood and urine tests
- Score below 6 on a sleep questionnaire (PSQI), meaning you don’t have major sleep problems
- Agree to keep a regular sleep-and-wake schedule during the study
- Avoid caffeine, nicotine, alcohol, cannabis, and other non-prescribed drugs during the study
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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