Post-Positivism - Postpositivism

Post-Positivism – Postpositivism

Post-positivism (also called postpositivism) is a research paradigm that emerged in the 20th century as a critique of and refinement to positivism. It retains the goal of seeking objective knowledge about an external reality but rejects the idea that perfect, certain, value-free objectivity is achievable. Post-positivism is the dominant philosophical stance underlying much contemporary quantitative and mixed-methods research in the social sciences.

Postpositivists are especially curious about the subjective nature of interpretation. Photo Credit: "Partner Showcase | re:publica 2017" by re:publica Campus #rpCampus is licensed under CC BY 2.0.

Table of Contents

What is Post-Positivism?

Post-positivism is an important philosophical perspective that has shaped research practice across the social and natural sciences. Understanding it matters for students in fields like psychology, communication, sociology, and professional and technical communication, where researchers use empirical methods but cannot always control variables as cleanly as laboratory scientists can.

Post-positivism gives these researchers a defensible philosophical foundation: they are not claiming certainty, but they are claiming something better than opinion. Their findings are grounded in evidence, tested against data, and open to challenge and revision.

From Positivism to Post-Positivism

Classical positivism — the 19th-century doctrine introduced by Comte De Saint-Simon — maintained that objective reality can be directly and definitively observed through strict adherence to the scientific method, yielding absolute truth. Positivists assumed that the universe is an orderly place governed by discoverable laws, and that a sufficiently rigorous researcher could reveal those laws with certainty.

By the early 20th century, philosophers of science were questioning this confidence. Most influentially, Karl Popper argued against naive verificationism: empirical claims can never be proven with absolute finality — only falsified. No number of confirming observations can guarantee a universal law; a single disconfirming instance can overturn it. This insight reoriented scientific practice. Rather than accumulating proof, scientists test hypotheses by trying to break them.

Post-positivism emerged from this critique. Post-positivists adopt Popper’s critical stance: they retain the realist belief that an objective external reality exists independently of human observation, but they accept that human perception and methodology are inherently fallible. Findings are not immutable laws or final truths — they are probabilistic, provisional models, continually open to testing, revision, and refinement.

To compensate for human fallibility, post-positivists rely on rigorous intersubjective scrutiny, methodological triangulation, and systematic peer review to approximate objectivity as closely as possible. Objectivity remains the goal — a regulatory ideal — even if it can never be fully achieved by any individual researcher.

Core Commitments of Post-Positivism

Post-positivists share the following beliefs:

Reality exists independently of our perception of it. Post-positivists are realists. They believe there is a world out there to be studied, and that empirical inquiry can tell us genuine — if imperfect — things about it.
Objectivity is a regulatory ideal, not an achievement. Researchers’ theories, hypotheses, background knowledge, values, and biases can influence observations. Post-positivists work to detect, minimize, and correct for these effects through careful methods.
All findings are provisional. Knowledge is fallible. Claims are warranted by evidence but can always be modified or withdrawn in light of further investigation or better evidence. Findings are best-available approximations, not absolute truths.
Falsifiability is the mark of a scientific claim. A genuine empirical claim must be testable — it must be possible to imagine evidence that would prove it wrong. This distinguishes science from ideology or dogma.

What Post-Positivism Is Not

Post-positivism is sometimes confused with constructivism or interpretivism — the view that knowledge is socially constructed through language and that all knowledge claims are equally contingent on the researcher’s perspective. That is a different philosophical tradition entirely.

Post-positivists do not reject statistical validity. They do not hold that research is purely an interpretive act with no claim on truth. They believe the universe has real patterns that systematic inquiry can reveal — imperfectly, provisionally, but genuinely. A post-positivist researcher running a survey will still analyze data statistically, report findings with appropriate confidence, and acknowledge limitations. They will not claim their findings are universal or final — but they will claim they are evidence, not just one interpretation among many equally valid ones.

Constructivism and interpretivism are addressed in the Qualitative Research Methods section. Those traditions ask different research questions and use different methods. They are not better or worse than post-positivism — they are suited to different problems.

Frequently Asked Questions

What is the core difference between positivism and post-positivism?

Classical positivism held that objective truth is fully attainable through rigorous systematic observation. Post-positivism accepts the goal of objectivity but acknowledges that human perception and measurement are always imperfect. Findings are provisional — valid until better evidence displaces them — rather than certain. See Positivism for the classical doctrine.

How is post-positivism different from constructivism?

Constructivism holds that knowledge is socially constructed through language and that no research finding has a privileged claim on reality. Post-positivism holds that reality exists independently of our constructions of it, and that systematic inquiry can reveal genuine — if imperfect and provisional — knowledge about that reality. These are fundamentally different starting points, suited to different research questions.

Do post-positivists use qualitative methods?

Some do. Post-positivism is a philosophical position, not a methods prescription. A post-positivist can use interviews or case studies, but they will frame and analyze those methods with attention to validity, reliability, and the limits of generalization. This is different from a constructivist qualitative researcher, who treats objectivity itself as an unachievable or misguided goal.

What is falsifiability?

Falsifiability, a concept associated with philosopher Karl Popper, holds that a genuine scientific claim must be testable in principle — it must be possible to imagine evidence that would prove it wrong. Post-positivists prize falsifiability because it distinguishes empirical claims from ideology or dogma. A claim that cannot be tested cannot be science.

What is triangulation?

Triangulation refers to the use of multiple methods, data sources, or investigators to check the consistency of findings. A post-positivist researcher who finds the same pattern through a survey, an interview study, and a corpus analysis has stronger grounds for confidence than one who relied on a single method alone. Triangulation is one of the key mechanisms post-positivists use to compensate for the fallibility of any single method.

What is replication?

Replication refers to repeating a study to see if the same results emerge under the same conditions. Post-positivists consider replication essential. Because no single study is definitive, the pattern of findings across multiple studies is more reliable than any individual result. Findings that cannot be replicated are treated with skepticism regardless of how well-designed the original study appeared.

What is fallibilism?

Fallibilism is the philosophical position that any knowledge claim, no matter how well supported, could in principle be wrong. Post-positivists are fallibilists: they believe the best available evidence warrants belief, but they hold that belief provisionally, always open to revision. This is what distinguishes scientific humility from relativism — the post-positivist does not say all views are equally valid; they say the best-evidenced view is the most warranted, while remaining revisable.