Caffeine's effect on hand reaction speed and manual dexterity

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

Why it matters

Who can join: the full rules

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 it's running

• Saglik Bilimleri Universitesi
  Istanbul, Üsküdar, Turkey (Türkiye) Recruiting

Study contacts

• Study coordinator: Esra Pehlivan
• Email: esra.pehlivan@sbu.edu.tr
• Phone: 05058527913

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.