Clinical trials
Cognition clinical trials
Below are recruiting cognition clinical trials, each written for real people, not researchers. We’re tracking 2,036 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06164756Enrolling by invitation
Long-term follow-up of the ketamine for Parkinson's trial
This study follows up on people with Parkinson's disease who took part in an earlier trial testing the effects of ketamine. It looks at how they do over a longer period of time.
New Haven, ConnecticutAges 40–80 - NCT06105307Enrolling by invitation
Improving sleep and fatigue for night shift RNs
This trial uses mobile technology and cognitive-behavioral techniques to help night shift nurses improve their sleep and reduce fatigue. If you work night shifts and have a smartphone, you may be eligible to join.
Cincinnati, OhioAges 18 years+ - NCT06023446Enrolling by invitation
Can eye photos detect early Alzheimer's disease?
This study uses a special camera (OCT) to take pictures of the retina (the back of your eye) to see if it can detect Alzheimer's disease very early. You may be eligible if you are either cognitively normal or have mild cognitive impairment, and have already had a test for Alzheimer's-related brain changes.
Sacramento, CaliforniaAges 50–89 - NCT05967728Enrolling by invitationPhase 2
Testing remote arm conditioning to protect the brain in stroke
This Phase 2 study tests whether a simple remote method that briefly reduces blood flow in the arm (called ischemic conditioning) can help people with brain small-vessel disease or an acute ischemic stroke. Participants are monitored by phone and, for stroke patients, through a Mobile Stroke Unit.
Calgary, AlbertaAges 55 years+ - NCT05746767Enrolling by invitation
Spanish digital therapy coaching for depression and anxiety
This study tests a digital “cognitive behavioral therapy” program with peer support to help Spanish-speaking adults with depression or anxiety. It may help you manage symptoms using structured online tools and guided peer interaction.
Payson, ArizonaAges 18 years+ - NCT05606991Enrolling by invitation
Testing how CPAP affects brain waste clearance during sleep
This study looks at how stopping CPAP for 14 nights affects “brain waste clearance,” a process your brain uses to clear byproducts during sleep. It is testing whether using CPAP versus stopping it changes this brain cleanup in adults with severe obstructive sleep apnea (OSA).
Macquarie Park, New South WalesAges 35–65 - NCT05520983Enrolling by invitation
Behavior program study for teens with learning or thinking differences
This study is testing a “behavioral health” treatment plan designed for teens who have intellectual and/or developmental disabilities. It may help identify which treatment approach works best for different youth needs.
Chicago, IllinoisAges 13–20 - NCT05457998Enrolling by invitation
Study of Alzheimer’s brain markers using memory testing
This trial looks for signs of Alzheimer’s disease in the brain by using memory and thinking tests, and related study procedures. It may help researchers find better ways to identify Alzheimer’s-related changes earlier.
Providence, Rhode IslandAges 50–80 - NCT05215886Enrolling by invitation
Bariatric surgery and memory problems in people with obesity
This study looks at how bariatric (weight-loss) surgery may affect memory and thinking in people with obesity who already have memory decline or dementia. It may help doctors understand which patients benefit most and what changes to expect.
Sacramento, CaliforniaAges 18–75 - NCT05160688Enrolling by invitation
Study of brain and mood changes when stopping cannabis
This study looks at how thinking (cognition) and psychiatric symptoms (mood/mental health symptoms) change during a period without cannabis. It uses special matched twin pairs to compare changes after stopping.
Aurora, ColoradoAges 31–47 - NCT04960566Enrolling by invitation
Behavior therapy for reflux symptoms tied to stress responses
This study tests a behavioral approach for people with GERD whose reflux symptoms keep coming back even after they tried an acid-blocking medicine (a PPI). It aims to help by targeting stress-related body responses that may worsen symptoms.
Chicago, IllinoisAges 18–80 - NCT04672174Enrolling by invitation
Cognitive screening study for adults with hearing loss
This study checks how well people with hearing loss perform on thinking and memory tests (cognitive screening). It may help researchers find better ways to spot thinking changes in people with hearing loss and understand what factors are involved.
Zurich, Canton of ZurichAges 50–90 - NCT04482660Enrolling by invitation
PET brain scan study of tau protein in ALFA volunteers
This study uses a special PET brain scan tracer to measure “tau” protein clumps in the brain. It’s meant to better understand brain changes in people who are already part of the ALFA research program, and may help researchers connect tau levels with memory and thinking.
Barcelona, BarcelonaAges 45 years+ - NCT04042532Enrolling by invitation
Theta-burst brain stimulation for younger-onset Alzheimer’s
This trial tests whether a form of brain stimulation (theta-burst stimulation) can improve thinking and memory in people with younger-onset Alzheimer’s. It also compares results with people without dementia who meet similar age and health requirements.
Taoyuan, GuishanAges 50–75 - NCT03687710Enrolling by invitation
Alzheimer’s registry for people with memory concerns or risk
This is a research registry that helps doctors compare how different memory and Alzheimer’s risk groups change over time. It may help researchers learn which people are more likely to develop Alzheimer’s and how to better track early changes.
New York, New YorkAges 18–99 - NCT03618186Enrolling by invitationPhase 2
Brain scan study for African Americans age 30+
This Phase 2 study uses brain imaging (including PET and MRI) to learn more about brain changes. It may help researchers improve how brain patterns are measured and understood, which could guide future care.
Jacksonville, FloridaAges 30 years+ - NCT03541135Enrolling by invitation
Study of heart health, diet, and activity in older adults
This study looks at heart health, food, and physical functioning in people age 65 and older living in Madrid. It may help researchers understand how lifestyle affects aging and cardiovascular wellbeing.
MadridAges 65–95 - NCT03370224Enrolling by invitation
Story memory training for older adults
This study tests a memory-skills training approach (the Modified Story Memory Technique) to help older adults with aging-related memory changes. You may be asked to do memory exercises, and some people may also complete an optional brain MRI scan.
East Hanover, New JerseyAges 65 years+ - NCT03101722Enrolling by invitation
Huperzine A for hearing loss, tinnitus, and mild memory issues
This trial tests whether huperzine A can improve hearing-related symptoms along with tinnitus (ringing) and mild cognitive (memory/thinking) problems. If you have mild-to-moderate hearing loss plus bothersome constant tinnitus and some cognitive decline, this study may help researchers see if the treatment makes a difference.
Shanghai, Shanghai MunicipalityAges 60 years+ - NCT03089827Enrolling by invitation
Tests how a brain imaging tracer spreads in Alzheimer’s risk
This trial uses a radioactive imaging tracer to see how it moves and settles in the brain in people with risk factors for Alzheimer’s disease. It may help researchers understand which people show tracer patterns linked to Alzheimer’s changes.
Winston-Salem, North CarolinaAges 55 years+
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Common questions
- Are there clinical trials for cognition?
- Yes. Clin2 currently lists 2,036 recruiting cognition studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a cognition trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a cognition trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.