Imaging and Genetic Investigation of Learning and Decision Making
Public ClinicalTrials.gov record NCT01950377. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: \- Previous research has shown that dopamine, a brain chemical, is involved in decision making. Different genes influence how much dopamine people have in their brains and how that affects their behavior. Researchers will study if genes associated with dopamine affect decision making and impulsiveness. All participants will take tests; some will have brain images taken. Researchers will study the test responses and images; they will look for how differences in these genes affect different types of decision making. Objectives: \- To see if genes involved in a brain chemical, dopamine, are related to impulsiveness on behavioral tests. Eligibility: \- Healthy adults ages 18 to 55. Design: * Participants will be screened with a medical history and physical exam. * All participants in this study will have at least 1 outpatient visit to the NIH Clinical Center. Each visit will last 2 4 hours. At the first visit: * A blood sample will be taken only from participants that have not been previously enrolled in 95-M-0150 * Participants will be given tests of their memory, attention, concentration, and thinking. * Some participants will have a second visit. It will be scheduled as soon as possible after the first. At the second visit: * Participants will have an MRI (magnetic resonance imaging). They will have to lie in a scanner for up to 2 hours. The MRI uses magnets, radio waves, and computers to produce detailed pictures of the brain. * Participants will repeat the tests from the first visit. Some will be done during the MRI.
Study identification
- NCT ID
- NCT01950377
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 78 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years to 50 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Feb 10, 2014
- Primary completion
- Feb 9, 2018
- Completion
- Mar 4, 2020
- Last update posted
- Jan 23, 2022
2014 – 2020
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland | 20892 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01950377, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 23, 2022 · Synced Sep 1, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01950377 live on ClinicalTrials.gov.