Actively Recruiting
The Association Between Sleep Quality and Cognitive Functions in Healthy Young Adults
Led by Uskudar University · Updated on 2026-04-29
75
Participants Needed
1
Research Sites
8 weeks
Total Duration
On this page
Sponsors
U
Uskudar University
Lead Sponsor
T
The Scientific and Technological Research Council of Turkey
Collaborating Sponsor
AI-Summary
What this Trial Is About
Researchers are investigating how sleep quality relates to cognitive functions in healthy young adults aged 18 to 35 years. This observational cross-sectional study evaluates both subjective sleep quality using the Pittsburgh Sleep Quality Index questionnaire and objective sleep parameters collected via a wearable device worn continuously for five consecutive days. The study aims to understand links between sleep patterns and cognitive abilities like attention, executive function, and verbal memory in this population. Participants will wear a sleep monitoring device for five days to gather objective sleep data such as total sleep time, sleep efficiency, and sleep onset latency. After this period, they will attend one in-person session for cognitive testing using standardized neuropsychological tests including the Victoria Stroop Test for attention and executive function and the Öktem Verbal Memory Processes Test for verbal memory. Demographic and background information will also be collected to support analysis. During the single assessment visit, participants will complete cognitive tests, and researchers will analyze associations between sleep measures and cognitive performance using statistical models. Subjective sleep quality from questionnaires and objective sleep data from the wearable device are the primary outcomes. The study does not involve treatment but focuses on observation and measurement. Total participation involves the five-day sleep monitoring plus one cognitive testing session.
CONDITIONS
Brief Title
Sleep Quality and Cognitive Functions in Adults: A Cross-Sectional Study
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Between 18 and 35 years.
- Ability and willingness to provide written informed consent.
- Sufficient ability to read, understand, and communicate in Turkish.
- Self-reported good general health without active medical or psychiatric conditions that affect daily functioning.
- Willingness and ability to wear a wearable sleep monitoring device continuously for five days.
- Ability to attend and complete a single-session cognitive assessment.
You will not qualify if you...
- Regular or frequent use of medications affecting sleep or cognitive function, including sedative-hypnotics, benzodiazepines, antipsychotics, stimulants, or opioids.
- Recent initiation or dose changes in psychotropic medications within the past four weeks.
- Being under the influence of alcohol or illicit substances on the day of cognitive testing.
- Engagement in night shift or rotating shift work within the past month.
- Travel across time zones with a difference of two hours or more within the past two weeks.
- Uncontrolled high daily caffeine intake (e.g., more than 400 mg/day) and unwillingness to reduce it during the study.
- Color blindness or other color vision deficiencies.
- Skin conditions or allergies preventing wearing the device on the wrist.
- Acute illness within the past two weeks that may affect sleep or cognitive performance.
- Pregnancy or early postpartum period.
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 5 consecutive days
Participants wear a sleep monitoring device continuously to collect objective sleep data.
Continuous device use for 5 days
Duration - 1 day
Participants complete a single in-person cognitive assessment session including neuropsychological tests and complete questionnaires about sleep quality and demographic information.
1 visit (in-person)
Trial Site Locations
Total: 1 location
1
Üsküdar University
Istanbul, Turkey (Türkiye)
Actively Recruiting
Research Team
F
Fatma Demir
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
1
Similar Trials
Frequently Asked Questions
Have more questions? Get in touch with our team for quick support
Not the Right Trial for You?
Explore thousands of other clinical trials that might be a better match.
Sign up to get personalized trial recommendations delivered to your inbox.
Already have an account? Log in here