HealthyNCT07032454
Hand Reaction Speed and Manual Dexterity & Caffeine Dependence
An observational study of Healthy, run by Saglik Bilimleri Universitesi at 1 site in Turkey (Türkiye).
Trial summary
This study aims to evaluate the effects of caffeine dependence on hand reaction time and fine motor skills in university students. By comparing individuals with high and low daily caffeine intake, the research will assess whether excessive caffeine consumption is associated with impaired upper extremity performance. Read more about this study
- Who is it for?
- Ages 18 to 30 years
- Conditions the study is for
- Healthy
- What is being tested?
- High Caffeine Consumption and Low Caffeine Consumption
- How many people
- 47 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 26 Jun 2025to 20 Jun 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 30 years
- All sexes
- Adult
Study population: Healthy university students
Who may be able to join
- Age 18 to 30 years
- Currently enrolled university students
Who cannot join
- Neurological, vascular, orthopedic, acute or chronic conditions affecting hand function
- History of wrist surgery or visible hand deformity
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site, 1 recruiting
- Recruiting
Saglik Bilimleri Universitesi
Istanbul, Üsküdar, 34668
Esra Pehlivan, Associate Professor, 02164189616, fztesrakambur@yahoo.com
About this study
Official title: Investigation of Hand Reaction Speed and Manual Dexterity in Young Adults With Caffeine Dependence
This study aims to evaluate the effects of caffeine dependence on hand reaction time and fine motor skills in university students. By comparing individuals with high and low daily caffeine intake, the research will assess whether excessive caffeine consumption is associated with impaired upper extremity performance. Reaction speed will be measured using the Nelson Hand Reaction Time Test, and manual dexterity will be assessed with the Purdue Pegboard Test.
Read the detailed description
This observational study investigates the effects of caffeine dependence on hand reaction time and manual dexterity in young adults. Caffeine is a widely consumed psychoactive substance, and its excessive intake may influence motor and cognitive performance. University students aged 18 to 30 are recruited and divided into two groups based on daily caffeine consumption and diagnostic criteria from DSM-5/ICD-10: a high caffeine group (≥300 mg/day) and a low caffeine group (20-200 mg/day). Data are collected using the Caffeine Consumption Frequency Questionnaire and behavioral assessments conducted in a controlled laboratory environment. Hand reaction speed is measured with the Nelson Hand Reaction Time Test, while manual dexterity is assessed using the Purdue Pegboard Test. Sociodemographic data and caffeine consumption are gathered via online forms. The aim is to determine whether excessive caffeine intake is associated with changes in reaction time and fine motor skills. Statistical analyses include normality testing, group comparisons, and correlation analyses, with significance set at p<0.05. This study may provide new insights into the neuromotor effects of caffeine consumption in a university population.
- Conditions
- Healthy
- Being tested
- High Caffeine Consumption, Low Caffeine Consumption
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
High Caffeine ConsumptionOther
Individuals consuming 300 mg or more of caffeine daily, meeting DSM-5/ICD-10 criteria for caffeine dependence.
Low Caffeine ConsumptionOther
Individuals consuming caffeine within recommended levels (20-200 mg/day).
| Study group | Role | What they receive |
|---|---|---|
| High Caffeine Group (≥300 mg/day) | Individuals consuming 300 mg or more of caffeine daily, meeting DSM-5/ICD-10 criteria for caffeine dependence. Receives: Other: High Caffeine Consumption | |
| Low Caffeine Group (≤200 mg/day) | Individuals consuming caffeine within recommended levels (20-200 mg/day). Receives: Other: Low Caffeine Consumption |
What is being measured
The primary outcome is the main question the study is designed to answer.
Nelson Reaction Time Test
The Nelson Reaction Time Test assesses visual motor response time using a dropped ruler. The score is recorded in milliseconds, with lower scores indicating faster (better) reaction time. The test does not use a fixed scale with minimum or maximum values, but typical results range from approximately 100 ms to 300 ms depending on age and condition. Higher scores indicate slower (worse) reaction time.
Measured: Within the study duration (1 month)
Secondary outcomes (1)
Purdue Pegboard Test
The Purdue Pegboard Test evaluates manual dexterity and fine motor coordination. It consists of four subtests: right-hand, left-hand, both-hands, and assembly tasks. In the first three tasks, participants place as many pins as possible into holes on the board within 30 seconds using the specified hand(s). In the assembly task, participants assemble pegs, collars, and washers in sequence for 60 seconds. Scores are recorded as the number of pins or assembled parts placed correctly within the time limit. There is no fixed maximum score; however, higher scores indicate better manual dexterity and coordination.
Measured: Within the study duration (1 month)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jun 2025
- Study start26 Jun 2025
- Primary completion20 Jun 2026 (estimated)
- Study completion20 Jun 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by Saglik Bilimleri UniversitesiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 47 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Saglik Bilimleri Universitesi
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, ESRA PEHLIVAN, Saglik Bilimleri Universitesi
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07032454
- Sponsor's protocol ID
- Caffeine_1
- Status last verified
- Jun 2025
- First submitted
- 14 Jun 2025
- Last updated
- 27 Jun 2025
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 27 Jun 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Investigation of Hand Reaction Speed and Manual Dexterity in Young Adults With Caffeine Dependence
- ClinicalTrials.gov ID
- NCT07032454
- Acronym / sponsor ID
- Caffeine_1
- Conditions
- Healthy
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 47 participants (estimated)
- Lead sponsor
- Saglik Bilimleri UniversitesiUniversity, hospital or other
- Study start
- 26 Jun 2025 (actual)
- Primary completion
- 20 Jun 2026 (estimated)
- Study completion
- 20 Jun 2026 (estimated)
- First posted
- 24 Jun 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to evaluate the effects of caffeine dependence on hand reaction time and fine motor skills in university students. By comparing individuals with high and low daily caffeine intake, the research will assess whether excessive caffeine consumption is associated with impaired upper extremity performance. Reaction speed will be measured using the Nelson Hand Reaction Time Test, and manual dexterity will be assessed with the Purdue Pegboard Test.
Detailed description
This observational study investigates the effects of caffeine dependence on hand reaction time and manual dexterity in young adults. Caffeine is a widely consumed psychoactive substance, and its excessive intake may influence motor and cognitive performance. University students aged 18 to 30 are recruited and divided into two groups based on daily caffeine consumption and diagnostic criteria from DSM-5/ICD-10: a high caffeine group (≥300 mg/day) and a low caffeine group (20-200 mg/day). Data are collected using the Caffeine Consumption Frequency Questionnaire and behavioral assessments conducted in a controlled laboratory environment. Hand reaction speed is measured with the Nelson Hand Reaction Time Test, while manual dexterity is assessed using the Purdue Pegboard Test. Sociodemographic data and caffeine consumption are gathered via online forms. The aim is to determine whether excessive caffeine intake is associated with changes in reaction time and fine motor skills. Statistical analyses include normality testing, group comparisons, and correlation analyses, with significance set at p<0.05. This study may provide new insights into the neuromotor effects of caffeine consumption in a university population.
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| High Caffeine Group (≥300 mg/day) | – | Other: High Caffeine ConsumptionIndividuals consuming 300 mg or more of caffeine daily, meeting DSM-5/ICD-10 criteria for caffeine dependence. |
| Low Caffeine Group (≤200 mg/day) | – | Other: Low Caffeine ConsumptionIndividuals consuming caffeine within recommended levels (20-200 mg/day). |
Who may qualify
- Ages
- 18 to 30 years
- Sex
- All
- Age groups
- Adult
- Study population
- Healthy university students
Key inclusion criteria (2 listed)
- Age 18 to 30 years
- Currently enrolled university students
Key exclusion criteria (2 listed)
- Neurological, vascular, orthopedic, acute or chronic conditions affecting hand function
- History of wrist surgery or visible hand deformity
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| High Caffeine ConsumptionIndividuals consuming 300 mg or more of caffeine daily, meeting DSM-5/ICD-10 criteria for caffeine dependence. | Other | High Caffeine Group (≥300 mg/day) |
| Low Caffeine ConsumptionIndividuals consuming caffeine within recommended levels (20-200 mg/day). | Other | Low Caffeine Group (≤200 mg/day) |
Primary outcome
Nelson Reaction Time Test
Time frame: Within the study duration (1 month)
The Nelson Reaction Time Test assesses visual motor response time using a dropped ruler. The score is recorded in milliseconds, with lower scores indicating faster (better) reaction time. The test does not use a fixed scale with minimum or maximum values, but typical results range from approximately 100 ms to 300 ms depending on age and condition. Higher scores indicate slower (worse) reaction time.
1 secondary outcome
Purdue Pegboard Test
Time frame: Within the study duration (1 month)
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Jun 2025.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Healthy, run by Saglik Bilimleri Universitesi at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 27 Jun 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Esra Pehlivan (05058527913, esra.pehlivan@sbu.edu.tr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Nelson Reaction Time Test (time frame: Within the study duration (1 month)). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jun 2025.