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ClinicalTrials.gov public records Last synced Oct 22, 2026, 2:21 AM EDT

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Showing 1–24 of 38 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Happiness Clear all
Completed Not applicable Interventional

Well-being in IBS: Strengths and Happiness (WISH)

NCT05289089
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Positive Psychology Intervention
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 22, 2025 · Synced Oct 22, 2026, 2:21 AM EDT
Recruiting Not applicable Interventional

cHAnging the Perceived Pain INtensity in divErSe Populations With Spinal Cord Injury

NCT06140355
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
Qigong, Daily 2 min pain management survey
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
3
States / cities
Miami, Florida • Minneapolis, Minnesota • Harlingen, Texas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Oxytocin and Social Behavior Over the Lifespan

NCT00914953
View directory record Official record
Conditions
Social Activity
Interventions
oxytocin (Pitocin)
Drug
Lead sponsor
Claremont Graduate University
Other
Eligibility
50 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Mar 2, 2012 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Aromatherapy and Happiness

NCT05864222
View directory record Official record
Conditions
Happiness
Interventions
Aromatherapy
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 6, 2024 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Results available

Healthy And Positive Pathways for Young People With Type 1 Diabetes (HAPPY T1D)

NCT05413239
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Psychoeducation to reduce diabetes distress and improve glycemic outcomes
Behavioral
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
14 Years to 25 Years
Enrollment
217 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
2
States / cities
Palo Alto, California • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Massive Individualized N-of-1 Experiments (MINEs)

NCT03695263
View directory record Official record
Conditions
Stress, Psychological, Happiness, Cognition
Interventions
Choice of one of five behavioral interventions
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
483 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 10, 2020 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional

Boosting Emotions & Happiness in Outpatients Living With Diabetes: Phase I

NCT03001999
View directory record Official record
Conditions
Type 2 Diabetes, Emotions, Patient Compliance
Interventions
PP-MI health behavior intervention
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 5, 2018 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Happy Family, Healthy Kids Program

NCT04183179
View directory record Official record
Conditions
Healthy Diet, Stress, Pediatric Obesity, Intergenerational Relations
Interventions
Happy Family, Healthy Kids Program
Behavioral
Lead sponsor
Michigan State University
Other
Eligibility
3 Years to 5 Years
Enrollment
214 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Thompsonville, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Results available

The Happy Older Latinos Are Active (HOLA) Health Promotion Study in HIV-Infected Latino Men

NCT03839212
View directory record Official record
Conditions
Human Immunodeficiency Virus, Cardiometabolic Risk
Interventions
HOLA Component 1, HOLA Component 2, HOLA Component 3, HOLA Component 4
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
50 Years and older · Male only
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jul 31, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Enduring Happiness and Continued Self-Enhancement

NCT02782611
View directory record Official record
Conditions
Happiness
Interventions
ENHANCE: Enduring Happiness and Continued Self-Enhancement
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
25 Years to 75 Years
Enrollment
154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 13, 2018 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of an 8-day Advanced Meditation, Samyama on Physical, Psychological and Spiritual Wellbeing ,and Associated Neural Mechanisms

NCT04366544
View directory record Official record
Conditions
Mental Health Wellness 1, Happiness, Depression, Consciousness, Level Altered, Ecstasy, Dietary Habits, Stress, Inflammatory Bowel Diseases
Interventions
Part A1: Survey, Part A2: Sample collection, Part B:
Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
759 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 3, 2024 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional

Happy, Healthy, Loved: A Mobile-delivered Breastfeeding Self-efficacy Intervention for First Time Parents

NCT04578925
View directory record Official record
Conditions
Breast Feeding
Interventions
Happy, Healthy, Loved
Behavioral
Lead sponsor
OhioHealth
Other
Eligibility
18 Years and older · Female only
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 14, 2023 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Happy Gut Study - Fermented Vegetables and Cardiovascular Biomarkers

NCT04887662
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
Fermented vegetable
Other
Lead sponsor
University of North Florida
Other
Eligibility
35 Years to 64 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 22, 2024 · Synced Oct 22, 2026, 2:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Parent Encouragement And Coaching of Happiness in Youth

NCT06725160
View directory record Official record
Conditions
Depression, Parent-Child Relations
Interventions
Parent Coaching, Active Control
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
4 Years to 99 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Recruiting Not applicable Interventional

Well-being in IBS: Strengths and Happiness (WISH) 2.0

NCT06866106
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Positive Psychology (PP) Intervention, Educational Intervention
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Completed No phase listed Observational

Happy Baby Hearts Study

NCT05842876
View directory record Official record
Conditions
Coarctation of Aorta
Interventions
Continuous Renal NIRS Monitoring, Standard Clinical Care, Satisfaction Survey
Device · Diagnostic Test · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
15 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
2
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Phase 2 Interventional Results available

Alii Supplement Study

NCT07271316
View directory record Official record
Conditions
Nutrient Deficiency, Happiness, Digestive Health, Vulnerability to Disease, Mood Swings, Energy
Interventions
Alii Supplement
Dietary Supplement
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Happy Families Project: Testing the Effectiveness of a Conflict Resolution Program for Families

NCT04980794
View directory record Official record
Conditions
Mental Health, Conflict
Interventions
Parent-child intervention, Self-study Intervention
Behavioral
Lead sponsor
University of Notre Dame
Other
Eligibility
4 Years and older
Enrollment
1,800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
3
States / cities
Fort Wayne, Indiana • Indianapolis, Indiana • Notre Dame, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 15, 2024 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Results available

Version 2 of the Smoking Cessation Smartphone App "Smiling Instead of Smoking" (SiS)

NCT03951766
View directory record Official record
Conditions
Smoking Cessation, Smoking, Tobacco
Interventions
Smiling Instead of Smoking (SiS) App Version 2
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional

Boosting Emotions & Happiness in Outpatients Living With Diabetes

NCT02736084
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Positive Psychology
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Oct 22, 2026, 2:21 AM EDT
Active, not recruiting Not applicable Interventional

Preventing Anxiety and Depression in Older Hispanics

NCT03870360
View directory record Official record
Conditions
Depression, Anxiety
Interventions
HOLA Component 1, HOLA Component 2, HOLA Component 3, HOLA Component 4, Healthy lifestyles education program
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
60 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated May 15, 2026 · Synced Oct 22, 2026, 2:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Mindfulness-Based Intervention to Reduce Stress Through the Cultivation of Loving-Kindness, Compassion, Joy, and Equanimity in Healthcare Professionals

NCT07283744
View directory record Official record
Conditions
Stress (Psychology), Inflamation, Psychosocial Functioning
Interventions
Building Emotional Strength Training
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Results available

Happy Older Latinos Are Active - Cognitive Decline

NCT04791709
View directory record Official record
Conditions
Cognitive Decline
Interventions
Happy Older Latinos are Active (HOLA)
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
50 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Oct 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional

Happy@Home: Delivering iCBT With Homecare Workers to At-Home Seniors

NCT04267289
View directory record Official record
Conditions
Depression
Interventions
Beating the Blues
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
60 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Oct 22, 2026, 2:21 AM EDT