Nursing is not only about clinical experience but also about evidence developed through systematic research. Research helps examine questions about patient care, nursing practice, education, healthcare delivery and many other areas relevant to the profession.
For nursing students, learning about nursing research begins with understanding that different research questions require different methods. A study measuring the effect of an intervention needs a different approach from one exploring how patients experience a particular health condition.
Understanding the main types of nursing research makes it easier to read studies, understand research methodology and recognise why researchers choose particular designs.
What Is Nursing Research?
Nursing research is a systematic process of investigating questions relevant to nursing, patient care, healthcare and related areas to develop or strengthen knowledge.
Research begins with a question or problem. Researchers then select an appropriate method to collect, analyse and interpret information.
The research question influences the method used. For example:
- How many patients experienced a particular outcome? may require numerical data
- How did patients experience a particular treatment? may require detailed descriptions of experiences
- Did an intervention improve an outcome? may require comparison between groups or measurements over time
This relationship between the question and research method is fundamental to understanding nursing research.
What Is the Purpose of Nursing Research?
The nursing research purpose depends on the question being investigated.
Research may be conducted to:
- Describe Health-Related Situations
- Understand Patient Experiences
- Examine Relationships Between Variables
- Evaluate Nursing Interventions
- Identify Problems in Healthcare Practice
- Explore Nursing Education
- Study Healthcare Delivery
- Generate Evidence for Future Research
Research does not automatically tell nurses what to do in every situation. Instead, it contributes evidence that can be considered alongside clinical expertise, patient needs and other relevant information.
Three Main Types of Nursing Research
At a broad methodological level, students will commonly encounter three approaches: quantitative research, qualitative research and mixed methods research. A 2024 nursing education article similarly identifies quantitative, qualitative and mixed methods as important approaches for novice nurse researchers. PubMed overview of nursing research approaches
1. Quantitative Research
Quantitative research focuses on information that can be measured or expressed numerically.
Researchers may collect numerical data and use statistical analysis to examine patterns, differences or relationships.
Examples of quantitative nursing research questions include:
- Does a nursing intervention reduce patient pain scores?
- Is there a relationship between sleep duration and stress levels among nursing students?
- How many patients experienced a particular outcome after an intervention?
Quantitative studies can use measurements, structured questionnaires, clinical data and other forms of numerical information.
Simple example: A researcher compares average pain scores before and after a nursing intervention.
The important point is that the research question involves something that can be measured numerically.
2. Qualitative Research
Qualitative research focuses on experiences, perceptions, meanings and perspectives.
Instead of asking primarily “how many?” or “how much?”, qualitative research often explores questions such as “how?”, “what?” and “why?”
Data may be collected through:
- Interviews
- Focus Groups
- Observations
- Open-Ended Questions
- Narratives
Researchers then analyse the information to identify themes, patterns or meanings.
Simple example: A researcher interviews patients to understand how they experience living with chronic pain.
The goal is not simply to calculate how many patients feel a certain way. It is to understand their experiences in greater depth.
3. Mixed Methods Research
Mixed methods research combines quantitative and qualitative approaches within the same research project.
For example, researchers might first collect numerical information through a questionnaire and then conduct interviews to understand the reasons behind those results.
Research literature describes mixed methods as useful when combining numerical findings with qualitative information, providing a broader or deeper understanding than either approach alone.
Simple example: Researchers measure stress scores among nursing students and then interview selected students to understand the experiences contributing to their stress.
Mixed methods research can be valuable for complex questions where numbers alone or experiences alone may provide only part of the picture.
Common Research Designs Used in Nursing
Quantitative, qualitative and mixed methods describe broad research approaches. Within them, researchers may use different study designs.
Students should avoid treating every item below as a completely separate category. Some designs can sit within broader methodological approaches.
Descriptive Research
Descriptive research aims to describe a situation, population or phenomenon as it currently exists.
For example:
What are the sleep patterns of nursing students during clinical postings?
The researcher may collect information without introducing an intervention.
Correlational Research
Correlational research examines whether variables are related.
For example:
Is there a relationship between study time and examination performance among nursing students?
Finding a correlation does not automatically prove that one variable caused the other.
Experimental Research
Experimental research examines the effect of an intervention under controlled conditions.
Researchers may compare outcomes between an intervention group and a control or comparison group.
For example:
Does a structured patient-education intervention improve medication knowledge compared with usual education?
Experimental designs can provide stronger evidence about cause-and-effect relationships when they are appropriately designed and conducted.
Quasi-Experimental Research
Quasi-experimental research also examines interventions but does not include all the features of a true experimental design.
For example, researchers might compare outcomes before and after introducing a new nursing education programme without randomly assigning participants to groups.
Students should examine the exact methodology rather than assuming that every intervention study is a randomised experiment.
Observational Research
In observational research, researchers observe or measure what happens without assigning the exposure or intervention being studied.
For example:
A researcher might observe hand hygiene practices within a healthcare setting and record how often recommended steps are followed.
The researcher is studying existing behaviour rather than introducing a new intervention.
Basic Research vs Applied Research
Another way of understanding the different types of nursing research is by considering their purpose.
Basic Research
Basic research aims to expand knowledge or improve understanding of a concept or phenomenon.
It may not have an immediate practical application.
Applied Research
Applied research focuses on practical questions or problems.
For example, research evaluating whether a particular nursing intervention improves an outcome has a direct practical focus.
The distinction is useful, but research can sometimes contribute to both knowledge development and practical application.
How to Identify the Right Type of Research
Students do not need to memorise research categories without context. Start with the research question.
Ask:
- Does the study measure something numerically? It may use quantitative research
- Does it explore experiences or perceptions? It may use qualitative research
- Does it intentionally combine numerical and qualitative evidence? It may use mixed methods
- Does it describe what currently exists? It may use a descriptive design
- Does it examine relationships? It may use a correlational design
- Does it test an intervention? It may use an experimental or quasi-experimental design
- Does it observe without introducing an intervention? It may use an observational design
The study’s methodology section should provide the final answer. A title alone is not always enough to identify the exact research design.
Role and Significance of Nursing Research
The role of nursing research extends beyond academic assignments. Research contributes to the knowledge used to examine and improve nursing and healthcare practice.
The significance of nursing research can include:
- Building Nursing Knowledge
- Evaluating Interventions
- Understanding Patient Experiences
- Identifying Healthcare Problems
- Examining Nursing Education
- Supporting Evidence-Informed Practice
- Identifying Questions for Further Research
Research also teaches students to question information rather than accepting every claim without examining the evidence behind it.
Scope of Nursing Research
The scope of nursing research is broad because nursing interacts with many areas of healthcare.
Research questions may involve:
- Patient Care
- Community Health
- Nursing Education
- Mental Health
- Maternal and Child Health
- Healthcare Quality
- Patient Safety
- Communication
- Nursing Management
- Technology in Healthcare
- Professional Practice
- Health Promotion
These examples are not an exhaustive list. The scope depends on the research question and the field being investigated.
Research Ethics in Nursing
Research involving people requires careful ethical consideration.
Researchers may need to consider areas such as:
- Informed Consent
- Privacy
- Confidentiality
- Participant Safety
- Voluntary Participation
- Fair Treatment
- Appropriate Handling of Information
For nursing students, understanding these responsibilities also connects with broader principles of nursing ethics, including respect, autonomy, confidentiality and professional responsibility.
The exact ethical approval and consent requirements depend on the research design, institution, participants and applicable regulatory framework.
Conclusion
Understanding the types of nursing research becomes easier when students first identify the question being asked.
Quantitative research focuses primarily on measurable numerical information. Qualitative research explores experiences, meanings and perspectives. Mixed methods research intentionally combines both approaches. Within these broader approaches, students may encounter descriptive, correlational, experimental, quasi-experimental and observational designs.
Learning these distinctions helps students understand research papers more accurately and recognise the role of nursing research in developing knowledge.
Rather than memorising research terminology in isolation, nursing students should practise connecting each research question with the method that can answer it most appropriately. That approach provides a stronger foundation for understanding research methodology and evidence throughout nursing education.
