What Is Nursing Science? Research Areas, Funding, and Career Paths

Nursing science is the systematic study of how nursing care affects health, illness, and the human experience of receiving care — the evidence base that underlies clinical nursing practice, care-delivery design, and health policy affecting patients across the lifespan. It investigates the phenomena nurses actually work with every day: how people and families respond to illness, injury, and treatment; which nursing interventions change outcomes and by how much; and how care can be organized, staffed, and delivered so those interventions actually reach patients. Nursing theory has long organized this territory around four linked concepts — person, environment, health, and nursing itself — often called nursing’s metaparadigm, and most nursing science, however specialized, ultimately traces back to questions about one or more of those four.

What Is Nursing Science, Exactly?

Nursing science is not simply “research about nurses.” Its defining focus is the human response to actual or potential health problems — how a person, family, or community experiences and manages illness, disability, or the transition through a health event — and the nursing interventions that shape that response. That focus distinguishes it from disciplines that study disease mechanism or treatment efficacy in the abstract: nursing science asks what happens when a specific intervention, delivered by a specific kind of caregiver in a specific care setting, meets a specific patient’s actual circumstances.

Core questions nursing science asks: Does a given nursing intervention (a symptom-management protocol, a discharge-teaching method, a staffing model) improve a measurable patient outcome, and for whom does it work best? What explains variation in how people experience and cope with the same diagnosis or treatment? How should care delivery — staffing ratios, care coordination, technology at the bedside — be structured to make good evidence-based practice reliably happen? And, increasingly central to the field, how does a research finding actually get adopted into routine bedside practice, and what stops it from spreading when it doesn’t?

That last question is why nursing science has produced an unusually large, well-developed body of implementation-science and evidence-based-practice (EBP) frameworks of its own — more so than most clinical disciplines. CASRAI covers several of the major ones in depth: the Iowa Model of Evidence-Based Practice, the Johns Hopkins Nursing EBP Model, the ACE Star Model of Knowledge Transformation, the Stetler Model of Research Utilization, and the ARCC Model for EBP mentorship — with a comparison guide on choosing among them for a given organization.

How Nursing Science Relates to Neighboring Disciplines

• Medicine centers on diagnosing disease and selecting treatment. Nursing science centers on the human response to that disease and treatment — symptom experience, self-management capacity, functional recovery, and the caregiving relationship — which is a genuinely different (and complementary) unit of study, not a subset of medical research.
• Public health studies population-level prevention and policy. Nursing science frequently operationalizes public-health goals at the point of care and in communities — community and public health nursing is one of its major subfields, discussed below — and CASRAI’s forthcoming guide on what public health is covers the broader field nursing science partly draws from and applies.
• Epidemiology supplies methods nursing science borrows directly, particularly for nurse-sensitive outcome measurement (see the funding and methods sections below); CASRAI’s guide on what epidemiology is covers the population-pattern methods that nursing outcomes research applies to specific care settings and interventions.
• Psychology contributes theory and method to the psychiatric-mental-health and behavioral-health branches of nursing science, and to symptom-experience research generally; see CASRAI’s guide on what psychology is.
• Biology and physiology supply the mechanistic foundation — how a disease process or a treatment’s side effects actually work in the body — that symptom-science and biobehavioral nursing research builds on; see CASRAI’s guide on what biology is.

Major Subfields of Nursing Science

• Clinical and intervention research — testing whether a specific nursing intervention (a pain-management protocol, a fall-prevention bundle, a discharge-teaching method) changes a measurable patient outcome.
• Symptom science — the mechanisms, measurement, and management of symptoms such as pain, fatigue, and nausea, often combining biobehavioral measurement with patient-reported outcomes.
• Health services and systems research — how staffing levels, care-delivery models, and organizational structure affect patient safety and quality outcomes; this is where nurse-sensitive quality indicators (discussed below) originate and where nursing science overlaps most directly with health-services research generally.
• Community and public health nursing science — care delivery and health promotion outside acute-care settings, at the household and community level.
• Psychiatric-mental health nursing research — assessment, intervention, and care-delivery models for mental illness and behavioral health.
• Pediatric and maternal-child nursing research — outcomes and care models spanning pregnancy, birth, infancy, and childhood.
• Gerontological nursing research — care of older adults, including chronic-disease self-management and long-term and palliative care; CASRAI’s forthcoming guide on what gerontology is covers the broader aging-focused discipline this subfield draws on.
• Oncology nursing research — symptom management, survivorship, and care coordination across the cancer trajectory.
• Nursing informatics research — how health information technology, documentation systems, and clinical decision support affect nursing workflow and patient safety.
• Implementation science / evidence-based practice — how to move a research finding into routine practice reliably, covered in depth by the EBP-model guides linked above.
• Nursing education research — how nurses themselves are best taught and trained, from simulation pedagogy to competency assessment.

Most nurse scientists specialize in one or two of these areas while sharing a common core of methodological training, described below.

Who Funds Nursing Science Research

Nursing science in the United States is funded through a mix of federal biomedical- and health-workforce agencies, plus a smaller set of nursing-focused private foundations and professional organizations:

• The National Institute of Nursing Research (NINR), one of the NIH’s institutes, is the field’s dedicated federal home. NINR’s stated mission is to lead nursing research that solves pressing health challenges and informs practice and policy, organized around five priority areas: optimizing health for all, addressing the conditions of daily life, addressing the distribution of health, preventing and managing disease, and advancing systems to optimize care. Like other NIH institutes, NINR funds work through standard mechanisms — R01 research project grants, R21 exploratory/developmental grants, K-series career development awards, and T-series institutional training grants.
• Other NIH institutes also fund nurse-led research when it aligns with their own disease or population focus — a nurse scientist studying cancer symptom management may be funded by the National Cancer Institute (NCI), one studying cardiovascular self-care by the National Heart, Lung, and Blood Institute (NHLBI), or one studying care of older adults by the National Institute on Aging (NIA) — the same pattern seen across NIH-funded disciplines generally: the natural institute home follows the subject matter, not the researcher’s professional degree.
• The Agency for Healthcare Research and Quality (AHRQ) funds health-services and patient-safety research that frequently involves nurse scientists and nurse-sensitive outcomes specifically, given AHRQ’s focus on care quality, safety, and delivery-system performance rather than disease biology.
• The Health Resources and Services Administration (HRSA) funds the nursing workforce pipeline directly through its Title VIII Nursing Workforce Development Programs — a different kind of support than NIH’s investigator-initiated research grants, aimed at nursing education capacity, faculty development, and practitioner training rather than a specific study’s hypothesis.
• The National Science Foundation (NSF)’s direct footprint in nursing science specifically is comparatively small next to NIH’s; where NSF funding does reach nurse researchers, it is typically through interdisciplinary human-factors, health-informatics, or biomedical-engineering awards rather than a nursing-specific program.
• Private funders active in the field include the Robert Wood Johnson Foundation (RWJF), the largest US foundation focused specifically on health, which has long supported nursing workforce and research initiatives, including sponsoring National Academy of Medicine consensus-study work on the future of the nursing profession; and the American Nurses Foundation, the philanthropic arm of the American Nurses Association, which runs its own nursing research grant programs.

For researchers navigating this landscape, the practical distinction that matters most is between NINR’s investigator-initiated, hypothesis-driven R01/R21 model, HRSA’s workforce-capacity funding, and AHRQ’s quality/safety-services orientation — three different funding relationships with different expected deliverables, not interchangeable sources for the same proposal.

Research Methods, Study Designs, and Tools

Nursing science draws on the full range of research designs, and the choice of design typically follows the question rather than the field’s tradition:

• Quantitative designs — randomized controlled trials and quasi-experimental designs to test intervention effectiveness, correlational and descriptive studies, and secondary analysis of large clinical or administrative datasets (electronic health record data, claims data, national nursing-workforce surveys).
• Qualitative designs — nursing science has an unusually strong qualitative tradition given its focus on lived experience: phenomenology (the meaning of an illness or care experience to the person living it), grounded theory (building explanatory theory from patient/family/clinician accounts), and ethnography (care delivered within its actual social and organizational context).
• Mixed-methods designs — combining outcome data with qualitative understanding of why an intervention did or didn’t work is common practice in nursing science specifically, not just a methodological afterthought.
• Instrument and measurement development — nursing science has produced a large share of the patient-reported outcome measures used across clinical research generally (pain, fatigue, and symptom-distress scales among them), which makes psychometric work — establishing an instrument’s validity and reliability before using it to measure an outcome — a core, recurring methodological skill in the field.
• Implementation science methods — the EBP models linked above, plus frameworks such as Normalization Process Theory, for understanding why an evidence-based intervention does or doesn’t become routine practice.

Common tools and data sources include statistical software (SPSS, R, SAS) for quantitative analysis, qualitative analysis software for coding interview and observational data, simulation labs for testing care-delivery changes before implementing them clinically, and standardized nurse-sensitive quality measures — the National Database of Nursing Quality Indicators (NDNQI) and the broader set of nurse-sensitive indicators it draws on — used both as research outcome measures and as the quality-benchmarking data nursing health-services research analyzes.

Career and Training Pathways

The typical entry point is a Bachelor of Science in Nursing (BSN) followed by RN licensure through the NCLEX-RN exam, administered by the National Council of State Boards of Nursing (NCSBN). From there, two doctoral pathways diverge, and the site’s audience frequently needs the distinction made explicit:

• A PhD in Nursing is the research-focused doctorate: original dissertation research, methodological training comparable to a PhD in any other field, and the standard credential for an academic or principal-investigator research career. Most programs expect or build in a master’s-level foundation (an MSN or equivalent), though direct-entry BSN-to-PhD pathways exist at some institutions.
• A Doctor of Nursing Practice (DNP) is the practice-focused doctorate: it culminates in a scholarly or capstone project applying evidence to a practice or systems problem rather than a traditional research dissertation, and prepares graduates for advanced clinical practice or health-system leadership roles rather than an independent research career. The two credentials are not interchangeable preparation for the same kind of position.

Relevant professional organizations include the American Association of Colleges of Nursing (AACN), which sets curricular standards for nursing education; Sigma (Sigma Theta Tau International, the Honor Society of Nursing), which funds nursing research grants and publishes nursing research journals; the American Nurses Association (ANA) and its American Nurses Credentialing Center (ANCC), which administers specialty certifications and the Magnet Recognition Program that many nursing-research-active hospitals hold (see CASRAI’s guide on Magnet versus the Pathway to Excellence designation); the Council for the Advancement of Nursing Science (CANS), a national voice for nursing science that convenes nurse scientists through its State of the Science Congress; the American Academy of Nursing (AAN), whose Fellows (FAAN) represent recognized leaders in the field; and the National League for Nursing (NLN), focused specifically on nurse educators.

Frequently Asked Questions

Is nursing science the same as nursing practice?

No — nursing science is the research discipline that generates and tests evidence; nursing practice is the clinical application of that evidence at the bedside. Most nurses are practitioners rather than researchers, but evidence-based practice deliberately connects the two: it is the mechanism by which nursing science findings are expected to change day-to-day care.

What is the difference between a PhD in Nursing and a DNP?

A PhD in Nursing is a research doctorate culminating in original dissertation research, aimed at academic and research careers. A Doctor of Nursing Practice (DNP) is a practice doctorate culminating in an applied scholarly or capstone project, aimed at advanced clinical practice or health-system leadership. Both are terminal degrees, but they prepare graduates for different kinds of work.

Who funds nursing research in the United States?

The primary federal funder is the National Institute of Nursing Research (NINR) at NIH, supplemented by other NIH institutes when a nurse scientist’s topic aligns with their disease or population focus, AHRQ for health-services and safety research, HRSA for nursing workforce development specifically, and private funders such as the Robert Wood Johnson Foundation and the American Nurses Foundation.

What is a nurse-sensitive indicator?

A nurse-sensitive indicator is a patient-care outcome or process measure that is affected, provided, or influenced by nursing personnel, though not exclusively determined by them — examples include hospital-acquired pressure injuries, patient falls, and nurse staffing ratios. CASRAI’s guide on nurse-sensitive indicators covers the concept and the NDNQI database built around it in more depth.

Related CASRAI Resources

This guide is part of CASRAI’s series on major scientific disciplines; see the overview guide to the branches of science for how nursing science fits alongside other fields, including epidemiology, psychology, and biology. For the evidence-based-practice frameworks nursing science is especially known for, see CASRAI’s guides on the Iowa Model, the Johns Hopkins Nursing EBP Model, the ACE Star Model, and how to choose among the available EBP models.