What Is Occupational Therapy Research?

Occupational therapy (OT) is a health profession and a research field concerned with how people carry out the everyday activities that matter to them — self-care, work, learning, play, caregiving, and community life — and how illness, injury, disability, or environment interferes with that participation. Its sister research tradition, occupational science, studies human activity itself: what people do, why, and how doing shapes health and wellbeing. This guide explains what occupational therapy research covers, how it relates to physical therapy and other rehabilitation disciplines, which methods and outcome measures it uses, who funds and publishes the work, and where research administration fits. It is an educational overview of a research discipline, not clinical advice.

What Is Occupational Therapy?

In occupational therapy, the word occupation does not mean only paid work. It means the meaningful activities that fill a person’s day: dressing, cooking, driving, writing, parenting, playing, working, and taking part in community life. Occupational therapists are licensed clinicians who evaluate how a person’s health condition, abilities, habits, and surroundings affect those activities, and who work with the person to build skills, adapt tasks, or modify the environment so that participation becomes possible or easier. The American Occupational Therapy Association (AOTA) describes its mission as empowering practitioners to help clients maximize their potential and their participation in everyday living.

As a research field, occupational therapy asks questions such as: which interventions help a child with a developmental condition participate in school; how a person recovering from stroke can resume daily routines; how home and workplace modifications affect independence in older adults; how people with mental health conditions rebuild roles and routines; and how to measure improvement in participation in a way that is meaningful to the person receiving care. Because the target is often daily function rather than a laboratory marker, the interventions are frequently behavioral, skill-based, or environmental rather than pharmacological.

Occupational Therapy and Occupational Science

The two terms are related but not identical. Occupational therapy is the applied profession and its clinical research: testing interventions, developing assessments, and studying services. Occupational science is the basic and interdisciplinary study of occupation as a human phenomenon — how people choose, organize, and experience activity across cultures and across the lifespan, and how participation (or its absence) relates to health. Occupational science draws on anthropology, sociology, psychology, public health, and the health professions, and its findings inform how occupational therapy is theorized and practiced. In practice the boundary is porous: many investigators work in both, and the two share journals, conferences, and doctoral programs.

Rehabilitation Science and Neighboring Disciplines

Occupational therapy research sits inside the wider field of rehabilitation science, which asks how to restore function and participation after impairment across professions. Many rehabilitation researchers use the World Health Organization’s International Classification of Functioning, Disability and Health (ICF) to describe the levels at which an intervention acts: body structures and functions, activities, and participation. Occupational therapy research concentrates on the activity and participation levels and on the person–environment fit. It overlaps with several neighboring disciplines:

Physical therapy focuses on movement and physical function; the two professions often treat the same patients, share trials and outcome instruments, and appear together in rehabilitation funding programs.
Kinesiology and biomechanics supply movement science and measurement methods that inform task analysis and assistive device design.
Neurology and geriatrics are medical specialties whose patients frequently need occupational therapy, so stroke recovery, dementia care, falls, and aging in place are major research themes.
Pediatrics overlaps through developmental conditions, sensory processing, school participation, and early intervention.
Psychiatry and mental health research overlap through community-based and recovery-oriented approaches to daily functioning.
Nursing science and public health share an interest in health behavior, care delivery, and population-level participation and prevention.

Major Subfields

Boundaries differ between institutions and journals, but occupational therapy research is commonly organized around the following areas:

Pediatric and developmental research — participation of children in play, school, and self-care; developmental coordination, autism, and sensory-related questions; early-intervention models.
Neurological rehabilitation — recovery of daily activity after stroke, brain injury, spinal cord injury, and progressive conditions, with links to neuroscience research on motor learning and cognition.
Hand and upper-extremity rehabilitation — function of the hand and arm after injury, surgery, or disease, including splinting and task-specific training.
Mental health and psychosocial research — routines, roles, and community participation for people with mental illness, trauma, or substance use conditions.
Productive aging and geriatric research — home safety, falls, driving and community mobility, dementia care, and supporting caregivers.
Work and ergonomics research — return to work, job accommodation, and workplace design.
Assistive technology and environmental modification — adaptive equipment, smart-home and wearable technologies, and telehealth delivery of therapy.
Health services, policy, and implementation research — access, cost, dosage, and how to move proven interventions into routine practice.
Occupational science — the study of everyday activity, routines, time use, and the meaning of occupation across populations.

Research Methods

The field uses the full range of health research designs, chosen to fit the question:

Randomized controlled trials test whether an intervention causes better outcomes than a comparison. They are the standard for efficacy but are harder to run for behavioral and environmental interventions than for drugs (see below).
Pragmatic trials test interventions under real-world conditions; see the entry on pragmatic trials and the comparison of internal and external validity.
Quasi-experimental and observational designs — cohort studies, registries, and natural experiments are used when randomization is impractical; see experimental vs. quasi-experimental design.
Single-case experimental designs study change within individuals across phases of intervention, which suits small or heterogeneous populations.
Qualitative and mixed methods are especially prominent in occupational therapy and occupational science: interviews, ethnography, photo-elicitation, and time-use diaries explore the lived experience of doing, barriers to participation, and clinician decision making.
Participatory and community-based research involves clients, families, and communities as partners in defining questions and outcomes.
Systematic reviews and meta-analyses synthesize trials, which are often small in this field.

For general guidance on design choices, the CASRAI research methods hub collects the related guides.

Outcome Measures

An outcome measure is a standardized instrument that quantifies a person’s status so that change can be tracked and compared. Occupational therapy researchers draw on several families of measures:

Performance-based assessments observe a person doing a task, such as meal preparation or a standardized daily-living task, and rate quality, effort, or safety.
Clinician-rated scales of independence, such as the Barthel Index and the Functional Independence Measure (FIM), which rate how much help a person needs with daily activities.
Patient-reported outcome measures (PROMs) capture participation, satisfaction with performance, and quality of life from the person’s own perspective. Because goals in occupational therapy are individualized, some instruments let each person nominate and rate their own priority activities. See choosing and validating a PROM.
Caregiver and proxy reports, used for young children and people with cognitive impairment, which need their own validation.
Performance tests shared with physical therapy, such as the Berg Balance Scale and the Timed Up and Go test, when mobility and falls are the focus.
Sensor-derived and time-use measures, including wearables and activity diaries, which add objectivity but need validation.

Choosing and interpreting a measure

A measure is only useful if it is valid, reliable, and responsive. Researchers also need to know how much change is meaningful. The minimal detectable change is the smallest change that exceeds measurement error, while a minimal clinically important difference is the smallest change patients themselves would consider important; the distinction is explained in statistical vs. clinical significance. Ceiling and floor effects recur in rehabilitation instruments, and a measure suited to one population may be inappropriate for another.

Clinical Trial Design Challenges

Blinding is limited. Participants and therapists usually know which intervention is delivered, so masking is typically possible only for outcome assessors and analysts. See allocation concealment vs. blinding.
Comparators are hard to construct. Trials commonly use usual care, a waitlist, an attention control, or another active intervention, and each answers a different question.
The intervention is complex and individualized. Dose, goals, setting, and clinician skill vary, so reporting standards such as the TIDieR checklist matter for reproducibility.
Clustering. Randomizing whole clinics or schools makes observations non-independent; see cluster-randomized trials and the design effect.
Heterogeneous populations and small samples make many trials underpowered, which is one reason single-case and adaptive designs are used.
Retention and missing data need a pre-specified plan, and trials should be registered before enrollment.

Societies, Foundations, and Journals

The American Occupational Therapy Association (AOTA) is the primary professional organization for occupational therapy practitioners in the United States. It describes itself as representing occupational therapists, occupational therapy assistants, and students, to advance practice, education, and research, and it publishes the American Journal of Occupational Therapy (AJOT), along with OT Practice magazine and books through AOTA Press.

The American Occupational Therapy Foundation (AOTF), established in 1965, is a separate, independent 501(c)(3) charitable organization dedicated to advancing occupational therapy science. It supports research through grant programs (it lists intervention and implementation research grants), offers student scholarships, recognizes distinguished researchers through its Academy of Research, and publishes the Occupational Therapy Journal of Research (OTJR). Internationally, national associations also publish journals, and occupational science has its own journals and scholarly community. Rehabilitation research also appears in specialty journals for stroke, pediatrics, geriatrics, and mental health, and in general medical journals when trials are large. For literature searches, PubMed and CINAHL are standard databases (see the CINAHL search strategy guide); use both occupational therapy and related terms such as rehabilitation and occupational science.

Who Funds Occupational Therapy and Rehabilitation Research?

Rehabilitation research is funded through several overlapping channels. This section describes the main United States federal funders; international funders and charities also support the field.

NIH: NICHD and the National Center for Medical Rehabilitation Research

The National Center for Medical Rehabilitation Research (NCMRR) is a research center within the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) at the National Institutes of Health. Its stated mission is to foster, through basic, translational, and clinical research, the scientific knowledge needed to enhance the health, productivity, independence, and quality of life of people with physical disabilities. NCMRR describes its portfolio in six domains: adaptation and plasticity; devices and technology development; rehabilitation diagnostics and interventions; chronic symptom management; health services research; and environmental factors. Other NIH institutes also fund rehabilitation-relevant work in their own areas, such as neurological disorders, aging, mental health, and musculoskeletal conditions, so a project is often a better fit for a different institute than its topic alone suggests.

NIDILRR at the Administration for Community Living

The National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR) sits within the Administration for Community Living (ACL), part of the U.S. Department of Health and Human Services, and describes itself as the federal government’s primary disability research organization. Its mission is to generate new knowledge and promote its effective use to improve the abilities of individuals with disabilities to perform activities of their choice in the community. It operates under Title II of the Rehabilitation Act of 1973. Its programs include Rehabilitation Engineering Research Centers, Rehabilitation Research and Training Centers, the Model Systems program, Field-Initiated Projects, the Switzer Research Fellowship program, Advanced Rehabilitation Research and Training, and Small Business Innovation Research. Where NIH tends to emphasize biomedical mechanisms and clinical trials, NIDILRR emphasizes disability, independence, employment, and community participation — themes close to the heart of occupational therapy.

Other sources

Other funding comes from the AOTF programs described above, the Department of Veterans Affairs and the Department of Defense, the National Science Foundation for engineering-oriented work, private foundations, and industry for devices. Applicants should verify current program names, eligibility, and deadlines directly with each agency, since funding opportunities and organizational structures change.

Training and Career Pathways

Clinical practice in the United States requires completing an accredited entry-level occupational therapy program, passing a national certification examination, and obtaining state licensure, with equivalent registration systems in other countries; occupational therapy assistants follow a separate, shorter pathway. Research careers typically add a research doctorate (PhD) or a post-professional doctorate, often alongside clinical training, in fields such as rehabilitation science, occupational science, neuroscience, public health, or education. Postdoctoral training and career-development awards help early-career investigators move toward independent funding. Check current requirements with the relevant accrediting, certifying, and licensing bodies.

The Research Administration Link

Occupational therapy studies create specific administrative questions. Human-subjects protection is central: participants may be children, older adults, or people with cognitive, communication, or mental health conditions, which affects consent, assent, and the use of legally authorized representatives. Studies in schools, homes, and community settings need site agreements and attention to privacy. If a protocol involves services billed to payers, coverage analysis applies, as in other clinical research. Assistive technology and wearable devices raise questions about regulatory status and data security. Multi-site trials need data-sharing agreements and a data management plan, and federal awards bring reporting and financial-compliance obligations. Qualitative and participatory designs often need flexible budgets for participant compensation and community partners, and clinician-researchers need realistic effort allocation.

Frequently Asked Questions

What is occupational therapy research?

It is the scientific study of how people participate in the daily activities that matter to them, including testing interventions, developing assessments, and studying services and the environments in which people live and work.

What is the difference between occupational therapy and occupational science?

Occupational therapy is the applied health profession and its clinical research. Occupational science is the interdisciplinary study of human occupation itself. The two overlap heavily and inform each other.

What is the difference between occupational therapy and physical therapy?

Physical therapy centers on movement and physical function, while occupational therapy centers on participation in daily activities and the fit between person, task, and environment. They frequently collaborate. See the physical therapy guide.

What do AOTA and AOTF do?

AOTA is the professional association for practitioners and publishes AJOT. AOTF is a separate charitable foundation that funds research and scholarships and publishes OTJR.

Who funds rehabilitation research in the United States?

Major federal funders include NIH, through NICHD and its National Center for Medical Rehabilitation Research (NCMRR) and other institutes, and NIDILRR at the Administration for Community Living. AOTF, the Department of Veterans Affairs, the Department of Defense, and private foundations also fund work.

What outcome measures are used?

Common categories are performance-based assessments, clinician-rated independence scales, patient-reported outcome measures, caregiver reports, and sensor or time-use measures.

Does this guide give treatment advice?

No. It describes a research field. Anyone with a health or functional concern should consult a licensed clinician.

What Is Occupational Therapy? Research Field Overview