Ontology and epistemology, positivism and interpretivism

Ontology and epistemology sit underneath the familiar divide between positivism and interpretivism—and they matter because they shape what counts as “reality” and what counts as legitimate knowledge. Ontology asks what reality is like: whether it is governed by universal, stable laws that exist independently, or whether it is dynamic and shaped by how people perceive and interpret it. That ontological stance then steers research choices: if reality is variable and law-like, researchers may observe, record, and even manipulate variables; if reality is socially constructed and interpretive, the work shifts toward understanding interactions and meanings rather than treating behavior as something to be engineered through measurement alone.

Epistemology follows from ontology by asking how knowledge is obtained—what it means to know something and how researchers can access that knowledge. In the classroom example of a boy misbehaving and bullying peers, an ontological view that treats behavior as explainable through variables pushes toward a more scientific, intervention-oriented approach: identify relevant factors and attempt to change them. A different ontological view treats the behavior as inseparable from social context, requiring deeper engagement with relationships and interaction patterns rather than a purely variable-based analysis.

Once ontology and epistemology are clarified, positivism and interpretivism become easier to map. Positivism aligns with a realist ontology: reality is independent of participants and governed by universal laws. It pairs this with objectivist epistemology, which emphasizes researcher distance and objectivity—assuming researchers and participants can exist independently without mutual influence. Interpretivism flips the emphasis. It often adopts a relativist ontology, where multiple realities exist as products of mental constructions shaped by individuals’ experiences and beliefs. Its subjective epistemology treats knowledge as co-constructed: researchers and participants influence each other as meaning is negotiated in the research encounter.

The contrast is sometimes illustrated with a metaphor of two “planets.” Positivists are likened to number-focused aliens who make sense of reality through observation and analysis of measurable quantities. Interpretivists are likened to talk-focused aliens who understand reality through interpretation and perspective-taking. But the practical landscape is messier than the caricature. Many researchers today blend approaches rather than committing strictly to one worldview. Postpositivism, constructivism, and pragmatism offer alternatives, and mixed methods has a parallel in philosophy: it is common to combine ontological and epistemological assumptions, perhaps leaning toward positivism in some respects while adopting a relativist stance in others. The key takeaway is that worldview alignment is not always a single package deal; researchers can be flexible as long as their choices remain coherent with their aims and assumptions about reality and knowledge.