Q: What is a research paradigm? How to choose a research paradigm

Answer: A research paradigm is a philosophical framework (a worldview made up of beliefs, assumptions, and values) that guides how research is carried out. Thomas Kuhn, who introduced the modern use of the term, described it as the set of common beliefs and agreements shared among scientists about how problems should be understood and addressed. In simpler terms, a research paradigm is the lens through which you see the world as a researcher. It dictates what you believe reality is, how you think knowledge can be obtained, and what methods are appropriate for gathering it.

The Three Pillars of a Research Paradigm

A research paradigm rests on three foundational components. Together, they define your philosophical stance and directly shape every decision you make in your study.

Ontology: What Is Reality?

Ontology is the study of the nature of reality. It asks: does a single objective reality exist, or are there multiple realities shaped by individual experience? A realist ontology holds that reality is objective and exists independently of the researcher. A relativist ontology holds that reality is subjective, constructed by individuals through their experiences. Your position here determines the entire direction of your research. For example, a medical scientist testing whether a new drug reduces blood pressure is working from a realist ontology: there is one measurable truth to be found. An education researcher exploring how students experience belonging in school is operating from a more relativist position: different students construct different realities.

Epistemology: How Do We Know Things?

Epistemology concerns the nature of knowledge and how we come to know something. It asks: can reality be known objectively through measurement, or can it only be partially understood through interpretation? There are three broad epistemological positions:

1. Reality can be objectively known if measured with the right tools.
2. Reality can only be partially known, because it is constructed in individual minds.
3. Reality is always changing and therefore impossible to fully comprehend at any given moment.

Your epistemological position determines whether your research will be objective or interpretive, and consequently whether it leans toward quantitative or qualitative methods.

Axiology: What Do We Value in Research?

Axiology deals with the role of values in research. It asks: should research be value-free, or is it inevitably value-laden? A positivist researcher might believe that the researcher's influence should be minimised and that findings should be as objective as possible. A constructivist or interpretivist researcher might argue that the researcher's values and perspectives are not a flaw but an integral part of knowledge construction—something to be disclosed and reflected upon rather than eliminated. Increasingly, scholars argue that no research is truly value-free. Understanding your axiological position means being transparent about the values you bring to your work and how they shape what you study and how you interpret what you find.

The Most Common Research Paradigms

There is no single definitive list of research paradigms, and different disciplines use different frameworks. The following are the most widely used across the social sciences, education, health, and humanities.

Paradigm	View of Reality	Approach to Knowledge	Typical Methods
Positivism	Single, objective reality	Empirically measurable	Quantitative (surveys, experiments)
Post-positivism	Single reality, partially knowable	Objective but fallible	Mostly quantitative, some qualitative
Constructivism	Multiple, subjective realities	Socially constructed	Qualitative (interviews, case studies)
Interpretivism	Multiple, subjective realities	Interpretation of lived experience	Qualitative (ethnography, narrative)
Pragmatism	Constantly changing reality	Use what works best	Mixed methods
Critical Realism	Layered objective reality	Structured by social context	Qualitative and quantitative

Positivism

Positivism holds that reality is singular, objective, and measurable. Positivist researchers believe that knowledge is generated through empirical observation and logical reasoning, and that research can and should be conducted in a value-free manner. They typically use quantitative methods like experiments, surveys, statistical analysis, and seek findings that can be generalised to similar situations. This paradigm is most common in the natural and physical sciences.

Post-Positivism

Post-positivists share the positivist view that a single reality exists, but acknowledge that perfect objectivity is unattainable. Researchers inevitably bring biases and value judgements to their work, even in how they choose what to study. Post-positivists therefore take deliberate steps to minimise their influence through reflexivity, transparency, and careful study design, rather than claiming to have eliminated it entirely.

Constructivism

Constructivists hold that reality is subjective and plural: individuals construct their understanding of the world through their experiences and social interactions. There is no single truth to be discovered; instead, knowledge is co-created between the researcher and participants. Constructivist research privileges the "why" behind behaviours and events, and favours qualitative methods such as in-depth interviews, focus groups, and case studies.

Interpretivism

Interpretivism shares constructivism's belief in multiple subjective realities, but places particular emphasis on understanding the meanings and interpretations that individuals attach to their own experiences. The researcher's role is to immerse themselves in the participants' world and gain a deep, empathetic understanding of their perspectives. This paradigm is widely used in sociology, anthropology, and education research.

Pragmatism

Pragmatism takes a flexible stance: rather than committing to a fixed view of reality or a single method, pragmatist researchers choose whatever approach best answers the research question. Reality is seen as constantly negotiated and changing. This makes pragmatism particularly suited to mixed-methods research, blending qualitative and quantitative approaches to produce practical, real-world insights.

Critical Realism

Critical realists believe that an objective reality does exist, but that it is layered and not always directly observable. Surface phenomena are shaped by deeper social, historical, and structural mechanisms (like power relations, institutional forces, cultural norms) that must be uncovered through analysis. Critical realist researchers aim not only to understand the world but to critique the structures within it, often with a view to advancing social justice.

How a Research Paradigm Influences Your Study

Choosing a research paradigm is not an abstract philosophical exercise. It has direct, practical consequences for every stage of your research.

1. Framing research questions: A positivist frames questions around measuring variables or testing hypotheses. A constructivist or interpretivist asks how people make meaning of their experiences.
2. Choosing methodology: A positivist reaches for structured, controlled methods. An interpretivist opts for open-ended qualitative approaches. A pragmatist selects whatever combination best fits the question.
3. Data collection: Positivist research seeks objectivity and detachment. Interpretivist research views the researcher as a key instrument, embracing their subjectivity as a resource.
4. Analysing and presenting findings: Positivists present statistical results as objective truths. Interpretivists present rich, narrative accounts of participants' perspectives. Critical realists expose the hidden structures driving the phenomena they study.

 

Why You Must Articulate Your Research Paradigm

Explicitly stating your research paradigm in a thesis, dissertation, or journal article serves several important purposes:

1. Transparency: It allows readers, reviewers, and examiners to assess whether your research design, methodology, and methods are coherent and consistent with your stated philosophical position.
2. Justifying methodological choices: Stating your paradigm explains why you chose particular methods and not others. This is a necessary defence in peer review and viva examinations.
3. Aiding interpretation: Different paradigms produce different interpretations of the same phenomenon. Declaring your paradigm helps readers situate your findings within the correct conceptual framework.
4. Contributing to scholarly dialogue: Articulating your paradigm encourages reflexivity and contributes to ongoing debates about how knowledge is produced in your field.
5. Enabling replication and extension: Researchers who wish to replicate or build upon your study need to understand your philosophical foundations in order to do so with methodological consistency.