Sleep quality and cognitive function in young adults
The Association Between Sleep Quality and Cognitive Functions in Healthy Young Adults
Uskudar University · NCT07387783
We will see if sleep quality, measured by a five-day wearable and a short sleep questionnaire, is linked to attention, thinking skills, and memory in healthy young adults.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 75 (estimated) |
| Ages | 18 Years to 35 Years |
| Sex | All |
| Sponsor | Uskudar University (other) |
| Locations | 1 site (Istanbul) |
| Trial ID | NCT07387783 on ClinicalTrials.gov |
What this trial studies
This is a cross-sectional observational project enrolling healthy adults aged 18–35 to explore links between sleep and cognition. Subjective sleep will be measured with the Pittsburgh Sleep Quality Index and objective sleep metrics will be collected from a wearable device worn continuously for five days. After the sleep monitoring period, participants complete a single in-person neuropsychological session that includes tests of attention, executive function (Victoria Stroop Test), and verbal memory (Öktem Verbal Memory Processes Test). Analyses will examine associations between self-reported and device-derived sleep measures and cognitive test performance while accounting for basic demographic factors.
Who should consider this trial
Good fit: Ideal candidates are healthy Turkish-speaking adults aged 18–35 who can give written consent, wear a sleep-monitoring device for five days, and attend a single cognitive testing session.
Not a fit: People with active medical or psychiatric conditions, regular use of medications that affect sleep or cognition, recent changes in psychotropic drugs, or inability to use the wearable device are unlikely to benefit from the study.
Why it matters
Potential benefit: If successful, the findings could improve understanding of how everyday sleep patterns relate to attention and memory in young adults and help shape sleep-health guidance.
How similar studies have performed: Previous observational work has repeatedly linked poor sleep to worse cognitive performance, so this project builds on established findings while adding five-day wearable monitoring in a Turkish young-adult sample.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Between 18 and 35 years. * Ability and willingness to provide written informed consent. * Sufficient ability to read, understand, and communicate in Turkish, the language in which the assessments are administered. * Self-reported good general health, with no active medical or psychiatric conditions that significantly affect daily functioning. * Willingness and ability to wear a wearable sleep monitoring device continuously for five consecutive days and to comply with device usage instructions. * Ability to attend and complete a single-session cognitive assessment Exclusion Criteria: * Regular or frequent use of medications known to affect sleep or cognitive function, including sedative-hypnotics, benzodiazepines, antipsychotics, stimulants, opioids, or similar agents. * Initiation of, 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 work or rotating shift schedules within the past one month. * Travel across time zones resulting in a time difference of two hours or more within the past two weeks. * Uncontrolled high daily intake of caffeine (e.g., \>400 mg/day) and unwillingness to reduce consumption during the study period. * Color blindness or other color vision deficiencies, due to their potential impact on Stroop Test performance. * Dermatological conditions, allergies, or skin lesions at the wrist that prevent wearing the device, or refusal to wear the device as required. * Acute illness within the past two weeks, including febrile infections, severe pain, or other acute medical conditions that may temporarily affect sleep or cognitive performance. * Pregnancy or early postpartum period.
Where this trial is running
Istanbul
- Üsküdar University — Istanbul, Turkey (Türkiye) (RECRUITING)
Study contacts
- Principal investigator: Fatma Demir, MSc — Üsküdar University
- Study coordinator: Fatma Demir
- Email: fatma.demir@uskudar.edu.tr
- Phone: (0216) 400 22 22
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions: Sleep Quality, Cognitive Functions, sleep quality, Cognitive Function, Young Adults, verbal memory, wearable device