Philosophy of Social Science: Epistemology and Methods

Core Idea

Philosophy of social science examines the epistemological foundations underlying research: how do we know claims about society? What counts as valid evidence? How do theory and observation relate? This course element grounds all subsequent methods in critical reflection on these foundational questions.

Explainer

Every research method embeds assumptions about what the social world is like and how we can know it — most researchers simply never make those assumptions explicit. Epistemology is the branch of philosophy that asks: what is knowledge, and how is it possible? Applied to social science, it forces three questions that shape every methodological choice: What kinds of things exist in the social world? (ontology) How can we gain knowledge of them? (epistemology) What counts as an adequate explanation? (philosophy of explanation). You cannot choose between a survey and an ethnography, between a causal model and an interpretive account, without implicitly answering these questions. This course makes those implicit answers explicit so you can defend and revise them consciously.

The dominant fault line runs between positivism and interpretivism. Positivism holds that the social world has objective features that exist independently of observers, that these features can be measured, and that social science should aim to generate law-like causal generalizations on the model of natural science. A positivist designs a study to test hypotheses, operationalizes abstract concepts into measurable variables, and evaluates findings by statistical criteria. Interpretivism denies this model: social reality is constituted by meaning, and meaning is not an objective feature of the world — it is constructed by actors whose interpretations make social life possible. A policy is not a set of physical actions; it is a meaningful object that exists only because actors understand, contest, and respond to it as such. To explain social phenomena, interpretivists argue, we must recover the meanings agents attach to their actions rather than correlate variables.

This is not merely a philosophical debate — it has direct methodological consequences. A positivist researcher studying poverty asks: what variables predict poverty status, and can we estimate their causal effects? An interpretivist researcher asks: how do poor people make sense of their situation, what categories do they use, and how do institutions define and impose the category of "poverty"? Both are legitimate research questions, but they require radically different methods, data, and criteria of validity. A third position — critical realism — attempts a synthesis: it accepts that social structures are real (against strong interpretivism) but insists that they operate through actors' interpretations (against naive positivism). Understanding which paradigm animates a study tells you how to evaluate it.

Theory and observation do not relate in the simple way that beginning researchers imagine. The naive view is that we observe first and theorize later — theories are just summaries of observed patterns. But philosophers of science have shown that observation is always theory-laden: what you look for, what you count as evidence, and what counts as an anomaly are all shaped by prior theoretical commitments. This is not a problem to be solved — it is the basic condition of inquiry. It implies that competing paradigms can look at the same data and reach different conclusions, not because one is lying, but because their different theoretical lenses make different features of the data salient. Being explicit about your paradigm does not make your research arbitrary; it makes it honest and criticizable.