Actively Recruiting
Sleep Quality and Cognitive Functions in Adults: A Cross-Sectional Study
Led by Uskudar University · Updated on 2026-04-29
75
Participants Needed
1
Research Sites
26 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
This observational cross-sectional study aims to examine the association between sleep quality and cognitive functions in healthy young adults. Subjective sleep quality will be assessed using the Pittsburgh Sleep Quality Index, and objective sleep parameters will be collected using a wearable device over five consecutive days. Cognitive functions will be evaluated at a single assessment session using standardized neuropsychological tests, including measures of attention, executive functions, and verbal memory. The study seeks to explore relationships between subjective and objective sleep measures and cognitive performance. Findings from this study may contribute to a better understanding of how sleep quality is associated with cognitive functioning in healthy young adults.
CONDITIONS
Official 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, 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
You will not qualify if you...
- 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.
AI-Screening
AI-Powered Screening
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Trial Site Locations
Total: 1 location
1
Üsküdar University
Istanbul, Turkey (Türkiye)
Actively Recruiting
Research Team
F
Fatma Demir
CONTACT
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
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