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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 3 Interventional

Atypical Neuroleptic Drugs in People With Mental Retardation/Developmental Delay

NCT00065273
View directory record Official record
Conditions
Mental Retardation, Developmental Delay Disorder
Interventions
risperidone, clozapine, olanzapine
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
6 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2001
U.S. locations
1
States / cities
Lawrence, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jun 10, 2026, 1:36 PM EDT
Available No phase listed Expanded access

Post-trial Access Program of Idursulfase-IT Along With Elaprase in Children With Hunter Syndrome

NCT05795361
View directory record Official record
Conditions
Hunter Syndrome
Interventions
Idursulfase-IT
Drug
Lead sponsor
Takeda
Industry
Eligibility
Male only
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
17
States / cities
Phoenix, Arizona • Oakland, California • Wilmington, Delaware + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 10, 2026, 1:36 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

BEhavioral Health Stratified Treatment (BEST) Study for Youth With Intellectual and/or Developmental Disabilities (IDD)

NCT05520983
View directory record Official record
Conditions
Depression, Anxiety, Transition
Interventions
Adapted Teens Achieving Mastery over Stress (TEAMS) Treatment, Adapted Teens Achieving Mastery over Stress (TEAMS) Prevention, Adapted Competent Adulthood Transition with Cognitive-behavioral & Interpersonal Training (CATCH-IT), Strengthening Families, Virtual psycho-educational discussion groups for caregivers and participants, Maternal Child Health Bureau (MCHB) Care Coordination
Behavioral · Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
13 Years to 20 Years
Enrollment
780 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Jun 10, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional

MindWalk Intervention for Older South Asian Caregivers of People With Cognitive Disabilities (CD)

NCT06002919
View directory record Official record
Conditions
Stress, Psychological, Cognitive Decline
Interventions
MindWalk Intervention
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
8
States / cities
Bolingbrook, Illinois • Buffalo Grove, Illinois • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jun 10, 2026, 1:36 PM EDT
Terminated No phase listed Observational

Ammonia Levels and Cognitive Impairment

NCT02059356
View directory record Official record
Conditions
Dementia, Cognitive Decline, Cognitive Impairment, Developmental Delay
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
Not listed
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2014
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 16, 2015 · Synced Jun 10, 2026, 1:36 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Arlington Longitudinal Optimal Healthy Aging Study (ALOHA)

NCT07180147
View directory record Official record
Conditions
Alzheimer Disease (AD), Cardio Vascular Disease, Mild Cognitive Impairment (MCI), Frailty Syndrome, Disability Physical, Hypertension, Metabolic Syndrome (MetS), Healthy Aging, Obesity &Amp; Overweight
Interventions
Not listed
Lead sponsor
Marymount University
Other
Eligibility
50 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2031
U.S. locations
1
States / cities
Arlington, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 4 Interventional Results available

Effectiveness of Methylphenidate in Improving Cognition and Function in Older Adults With Depression

NCT00602290
View directory record Official record
Conditions
Depression
Interventions
Citalopram, Methylphenidate (MPH), Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
60 Years and older
Enrollment
181 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 10, 2018 · Synced Jun 10, 2026, 1:36 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Psychiatric and Cognitive Manifestations of Parkinson's Disease

NCT00360633
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 9, 2019 · Synced Jun 10, 2026, 1:36 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Evaluating Cognitive Outcomes in Down Syndrome

NCT04208685
View directory record Official record
Conditions
Down Syndrome
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Years to 35 Years
Enrollment
202 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
2
States / cities
Fort Collins, Colorado • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 25, 2023 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Safety and Dose Ranging Study of Idursulfase (Intrathecal) Administration Via an Intrathecal Drug Delivery Device in Pediatric Patients With Hunter Syndrome Who Have Central Nervous System Involvement and Are Receiving Treatment With Elaprase®

NCT00920647
View directory record Official record
Conditions
Hunter Syndrome
Interventions
Control, Idursulfase IT (1 mg), Idursulfase IT (10 mg), Idursulfase IT (30 mg)
Other · Drug
Lead sponsor
Shire
Industry
Eligibility
3 Years to 18 Years · Male only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 27, 2021 · Synced Jun 10, 2026, 1:36 PM EDT
Terminated Phase 4 Interventional Results available

Quetiapine XR for Cognitive and Functional Disability in Clinically Stable Patients With Bipolar Disorder

NCT00746421
View directory record Official record
Conditions
Bipolar Disorder, Cognitive Impairment
Interventions
Quetiapine XR, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Atlanta, Georgia • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 16, 2014 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Down Syndrome Memantine Follow-up Study

NCT02304302
View directory record Official record
Conditions
Down Syndrome, Intellectual Disability
Interventions
Memantine, Placebo
Drug
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
15 Years to 32 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 26, 2023 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 2 Interventional

Improving Functional Health Literacy in Older Veterans

NCT00038337
View directory record Official record
Conditions
Visual And Cognitive Disability
Interventions
Health Literacy
Procedure
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
65 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 20, 2009 · Synced Jun 10, 2026, 1:36 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Facilitating Numerical Processing With Transcranial Stimulation in Developmental Dyscalculia

NCT01195961
View directory record Official record
Conditions
Cognition Disorder, Brain Mapping
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 50 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Not applicable Interventional

Cognitive Rehabilitation in Sickle Cell Disease

NCT01793740
View directory record Official record
Conditions
Sickle Cell Disease, Cognitive Impairment
Interventions
Cogmed
Behavioral
Lead sponsor
Duke University
Other
Eligibility
8 Years to 16 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 19, 2014 · Synced Jun 10, 2026, 1:36 PM EDT
Not yet recruiting Not applicable Interventional

Developing a Nonpharmacological Pain Intervention for Community-dwelling Older Adults With Dementia

NCT06264362
View directory record Official record
Conditions
Pain, Chronic, Dementia, Mild, Mobility Limitation, Physical Disability, Osteo Arthritis Knee, Mild Cognitive Impairment
Interventions
Tailored Physical Activity Program
Behavioral
Lead sponsor
Drexel University
Other
Eligibility
60 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Study of Long Term Safety and Clinical Outcomes of Idursulfase IT and Elaprase Treatment in Pediatric Participants Who Have Completed Study HGT-HIT-094

NCT02412787
View directory record Official record
Conditions
Hunter Syndrome
Interventions
Idursulfase-IT, Elaprase
Drug
Lead sponsor
Shire
Industry
Eligibility
Up to 18 Years · Male only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2024
U.S. locations
3
States / cities
Oakland, California • Chicago, Illinois • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Not applicable Interventional

Project for Cognitive Advancement in Infants With Neuromotor Disorders

NCT02673658
View directory record Official record
Conditions
Motor Coordination or Function; Developmental Disorder
Interventions
Motor + problem solving, body weight support training
Behavioral
Lead sponsor
Duquesne University
Other
Eligibility
7 Months to 36 Months
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 17, 2019 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 4 Interventional Results available

Brain Aging and Treatment Response in Geriatric Depression

NCT01902004
View directory record Official record
Conditions
Mild Cognitive Impairment (MCI), Depression
Interventions
Escitalopram, Memantine, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
60 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 14, 2019 · Synced Jun 10, 2026, 1:36 PM EDT
Withdrawn Not applicable Interventional

Improving Caregivers' Ability to Manage Life Stress

NCT05539352
View directory record Official record
Conditions
Suicidal Ideation
Interventions
Problem Solving Therapy (PST) plus EUC
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
50 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 12, 2025 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Phase 1 Interventional Results available

Safety, Tolerability and Immunogenicity of ACI-24 Vaccine in Adults With Down Syndrome

NCT02738450
View directory record Official record
Conditions
Down Syndrome
Interventions
ACI-24 low dose, ACI-24 high dose, Placebo
Biological
Lead sponsor
AC Immune SA
Industry
Eligibility
25 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
4
States / cities
Phoenix, Arizona • La Jolla, California • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 14, 2021 · Synced Jun 10, 2026, 1:36 PM EDT
Completed Not applicable Interventional

WayFinder Ride Phase I Study

NCT07437651
View directory record Official record
Conditions
WayFinder Ride Prototype, Uber App, Lyft App
Interventions
WayFinder Ride Phase I Prototype, Lyft Rideshare App, Uber Rideshare App
Device
Lead sponsor
AbleLink Smart Living Technologies
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Jun 10, 2026, 1:36 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Interventions in Mathematics and Cognitive Skills

NCT05201534
View directory record Official record
Conditions
Math Learning Disability, Child Development, Developmental Disability, Learning Disabilities, Learning Disabled, Learning Curve, Mathematics Disorder, Dyscalculia, Dyscalculia, Primary, Dyscalculia, Acquired, Specific Learning Disorder, With Impairment in Mathematics, Individuality, Behavior, Child, Behavior and Behavior Mechanisms, Behavior, Decision Making, Neuronal Plasticity, Cognition, Cognition Disorder, Cognitive Dysfunction, Cognitive Change, Cognitive Impairment, Mild, Cognitive Developmental Delay, Cognitive Orientation, Cognitive Delay, Mild, Cognitive Deficits, Mild, Cognitive Abnormality, Neuroscience
Interventions
Interventions in Mathematics and Cognitive Skills - Experimental, Interventions in Mathematics and Cognitive Skills - Active Comparator
Other
Lead sponsor
Stanford University
Other
Eligibility
6 Years to 12 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Aug 14, 2025 · Synced Jun 10, 2026, 1:36 PM EDT
Completed No phase listed Observational

Non-drug Study to Evaluate the Suitability of Neurocognitive Tests and Functioning Scales for the Measurement of Cognitive and Functioning Changes in Children With Down Syndrome

NCT02451657
View directory record Official record
Conditions
Down Syndrome
Interventions
No Intervention
Other
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
6 Years to 11 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
3
States / cities
Tucson, Arizona • Boston, Massachusetts • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 24, 2017 · Synced Jun 10, 2026, 1:36 PM EDT