Caffeine's effect on hand reaction speed and manual dexterity
Investigation of Hand Reaction Speed and Manual Dexterity in Young Adults With Caffeine Dependence
This project will test whether high daily caffeine intake changes hand reaction time and fine motor skills in university students aged 18–30.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 47 (estimated) |
| Ages | 18 Years to 30 Years |
| Sex | All |
| Sponsor | Saglik Bilimleri Universitesi Academic / other |
| Locations | 1 site (Istanbul, Üsküdar) |
| Trial ID | NCT07032454 on ClinicalTrials.gov |
What this trial studies
This observational study divides enrolled university students into high (≥300 mg/day) and low (20–200 mg/day) caffeine consumption groups based on self-report and diagnostic criteria. Participants complete the Caffeine Consumption Frequency Questionnaire and attend a controlled lab session where hand reaction speed is measured with the Nelson Hand Reaction Time Test and manual dexterity with the Purdue Pegboard Test. Sociodemographic data are collected online and statistical analyses compare group performance and correlations with caffeine intake. Exclusion criteria remove participants with neurological, vascular, or orthopedic conditions, prior wrist surgery, or visible hand deformity to isolate caffeine-related effects.
Who should consider this trial
Good fit: Healthy university students aged 18–30 without neurological, vascular, or orthopedic conditions affecting the hands are ideal candidates.
Not a fit: People with wrist surgery history, visible hand deformities, neurological or vascular disorders, or those not enrolled in university or outside the 18–30 age range are unlikely to benefit.
Why it matters
Potential benefit: If successful, the findings could help students and clinicians understand how heavy caffeine use affects reaction speed and hand dexterity and inform consumption guidance.
How similar studies have performed: Previous studies show low-to-moderate caffeine can improve simple reaction times, but the specific effects of caffeine dependence on fine motor control in young adults remain less well studied.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age 18 to 30 years * Currently enrolled university students Exclusion Criteria: * Neurological, vascular, orthopedic, acute or chronic conditions affecting hand function * History of wrist surgery or visible hand deformity
Where this trial is running
Istanbul, Üsküdar
- Saglik Bilimleri Universitesi — Istanbul, Üsküdar, Turkey (Türkiye) (Recruiting)
Study contacts
- Study coordinator: Esra Pehlivan
- Email: esra.pehlivan@sbu.edu.tr
- Phone: 05058527913
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.