What Is Empirical Study?
An empirical study is research built on observed data — measurements, surveys, experiments, interviews — rather than on argument about other people's theories. The tell is a methods section and a results section. When a rubric asks for empirical sources, it wants articles that generated their own evidence. This page unpacks the definition, the mistakes graders see most, and a worked example you can pattern-match against your own draft.
James Parker, MLS
Citation & Formatting Reviewer · Master of Library Science; 9 years as a reference librarian coaching APA, MLA and Chicago styles
Quick answer
An empirical study is research built on observed data — measurements, surveys, experiments, interviews — rather than on argument about other people's theories. The tell is a methods section and a results section. When a rubric asks for empirical sources, it wants articles that generated their own evidence.
On this page · 4 sections
The definition, precisely
An empirical study is any research article whose claims rest on data the authors collected or generated themselves: an experiment, a survey, field measurements, transcripts of interviews, archival counts. The structural tell is mechanical and reliable — the article carries a method section describing how the data were produced and a results section presenting what the data showed. Theoretical essays, literature reviews without new data, opinion pieces and book chapters that argue from existing work fail the test no matter how scholarly their tone.
The label covers a wider spread than students expect. Quantitative empirical studies report numbers: a trial with 240 participants, a survey of 1,100 voters, sensor readings from 30 monitoring stations. Qualitative empirical studies report analyzed language: 18 interviews coded for coping strategies, field notes from four classroom observations. Mixed-methods studies do both. What unites them is the evidence chain — question, data, analysis, finding — and that chain is what you cite an empirical study for. A rubric demanding empirical sources is demanding that chain, because claims traced to it can be checked.
Using empirical studies well means citing the finding at its actual precision. The article says the intervention reduced no-shows by 12 percentage points (95% CI 7-17) in one clinic network; a student paper that generalizes it to clinics everywhere has outrun the evidence. Keep three habits: name the sample when the claim leans on it, match the study's population to your argument's population, and prefer recent replications to single older findings. Those habits are what separate an evidence-based paragraph from a paragraph that merely sounds researched.
The four mistakes graders see most
Every one of these shows up in a stack of sixty papers — usually more than once. Each pairs the error with the fix, so the table doubles as a pre-submission check.
| Common mistake | The fix |
|---|---|
| Citing a literature review as if it were an empirical study. | Check the skeleton: no methods and results section means no new data. Cite the review for an overview, then chase its key citations to the primary studies. |
| Quoting a study's conclusion without its sample. | Attach the population to the claim: in a trial of 240 nursing students, not simply a study found. Sample-less citations are the first thing a methods-savvy grader flags. |
| Treating a preprint as peer-reviewed evidence. | A preprint carries no review badge. Label it as such in prose, or find the published version — most appear within a year. |
| Assuming an empirical study must be an experiment. | Surveys, interviews, observations and archival counts are all empirical designs. The evidence chain is the requirement, not the lab coat. |
A worked example
A criminal justice paper on body cameras gets two candidate sources: a systematic review summarizing 70 evaluations, and one randomized trial from the review that assigned 400 officers to wear cameras. The review is the efficient map but fails the empirical test; the trial passes — design, participants, results. The strong paragraph cites the review to establish the field's overall pattern, then anchors its specific claim to the trial: 400-officer RCT, complaint rates down 17 percent, jurisdiction named, so every number in the sentence traces back to evidence the authors actually collected.
Pattern-match your own draft against this example rather than against the definition: concrete cases transfer better than abstract rules, and the example shows what the rule looks like when it is done right.
How empirical study differs from its neighbors
An empirical study is not the same thing as a peer-reviewed article — the two axes are independent, and all four combinations exist. A peer-reviewed theoretical essay has review badges and no data; an arXiv preprint has data and no review. It is also not a systematic review, which re-analyzes existing studies rather than generating data — though the best undergraduate papers cite both, the review for the map and the trials for the ground. When a rubric says scholarly, either passes; when it says empirical, only the data-carrying articles do.
Boundary confusion is where most grading deductions live: the term is understood roughly but applied against the wrong neighbor. Pin the boundary above and the term stops being fuzzy in practice, which is what the rubric is actually testing.
What's your next step?
Two taps to the exact page that unblocks this paper.
The 30-second check
Skim the four mistakes above against your draft. Any hit is a fix you can make in minutes — and the format row of the rubric is where they all live.
Questions with exact numbers
Forty-plus student questions — word counts, source math, citation edge cases — answered with the real arithmetic.
Browse the Q&ARelated term: Peer Review — the neighbor this term is most often confused with. Reading the pair together is how the boundary sticks.
Frequently asked questions
4 answered1How do I tell if an article is an empirical study?
Scan the section headers: methods or methodology, results or findings, and usually a discussion separate from them means empirical. Abstracts help — empirical abstracts state a sample and a result, not just an argument. No data-producing section, no empirical study, regardless of how technical the article sounds.
2Are qualitative studies empirical?
Yes. Interviews, focus groups and observations generate data, and coding them is analysis. A study of 18 caregiver interviews with a stated coding scheme is exactly as empirical as a 2,000-person survey — what matters is that the authors generated and analyzed evidence themselves, not whether the evidence arrives as numbers.
3Can I cite a dissertation as an empirical source?
Usually with caution. Dissertations report original data and are empirical, but they are reviewed by a committee rather than journal referees, so rubrics that say peer-reviewed exclude them. If yours allows scholarly sources, cite the dissertation for its design detail and chase its published articles — most strong dissertations surface as journal papers within two years.
4Does empirical mean quantitative?
No — that is the most common conflation in methods courses. Empirical covers any systematically collected evidence: counts, measurements, interviews, field notes, historical records. The branch names describe the data type (quantitative, qualitative, mixed), not whether evidence exists. A rubric asking for empirical sources is asking for the evidence chain, not for statistics.
James Parker, MLS
Citation & Formatting Reviewer · Master of Library Science; 9 years as a reference librarian coaching APA, MLA and Chicago styles