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.
Eligibility
Sex
ALL
Min age
18 Years
Max age
35 Years
Healthy volunteers
Accepted
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.
Primary outcome measure(s)
Composite Objective Sleep Quality Index Derived From Wearable Device — During 5 consecutive days around baseline assessment A composite objective sleep quality index will be derived from wearable device data collected continuously over five consecutive days. The composite score will be calculated by combining standardized values of total sleep time, sleep efficiency, sleep onset latency, and wake after sleep onset into a single summary measure representing overall objective sleep quality.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
We use cookies to analyse site traffic and improve your experience. With your consent, we may also use cookies for advertising. You can change your choice at any time.