An abstract is a self-contained summary of a research paper, typically 150 to 300 words, that describes the paper’s purpose, methodology, key findings, and conclusions. The abstract appears at the beginning of the paper (after the title page and before the introduction) and serves as the reader’s first — and sometimes only — encounter with the work. Researchers scanning a database decide whether to read a full paper based on its abstract; journal editors use abstracts to evaluate submissions; conference organizers use them to select presentations. In student research, the abstract demonstrates the ability to distill a complex argument into a concise, accurate summary. This guide, part of iResearchNet’s How to Write a Research Paper series, covers the structure, content, and conventions of research paper abstracts. Not all assignments require an abstract — it is standard in APA-formatted papers in the social sciences, sciences, and health professions but less common in humanities papers formatted in MLA or Chicago style. Students should confirm whether their assignment requires one before including it.
When to Write the Abstract
The abstract is almost always the last section of the paper written, even though it appears first in the finished document. This sequencing is necessary because the abstract must accurately summarize the paper’s content, which is not fully known until the paper is complete. An abstract written before the body and conclusion risks summarizing the paper the student intended to write rather than the paper that was actually written — a mismatch that is immediately apparent to any reader who proceeds from the abstract to the full text.
Students should write the abstract only after the final draft is complete and all revisions have been made. The abstract should describe the paper as it exists, not the paper as it was planned.
Components of an Abstract
Despite its brevity, an effective abstract addresses four elements:
Purpose. The abstract’s opening sentence or sentences identify the research question, problem, or objective the paper addresses. This element tells the reader what the paper is about and why the question matters. “This paper examines the relationship between school resource officer presence and student disciplinary outcomes in U.S. urban middle schools” establishes both the topic and its scope.
Method. The abstract describes how the paper answers its research question. For empirical papers, this includes the data source, sample, and analytical method. For argument-based papers, this includes the analytical framework and the types of evidence used. “Using disciplinary records from 47 urban middle schools over a three-year period, this study compares suspension rates, expulsion rates, and police referrals between schools with and without school resource officers, controlling for student demographics and neighborhood poverty rates” tells the reader exactly how the question was investigated.
Findings. The abstract reports the paper’s main results or conclusions. For empirical papers, this includes the direction and magnitude of key findings. For argument-based papers, this includes the central claim and its primary support. “Schools with resource officers showed 23 percent higher suspension rates and 42 percent higher police referral rates than comparable schools without officers, with the disparities concentrated among Black and Hispanic male students” provides the reader with the paper’s core findings.
Conclusions. The abstract’s final sentence or sentences state the implications or significance of the findings. “These results suggest that school resource officer programs, as currently implemented, may exacerbate rather than reduce disciplinary disparities, and that alternatives such as restorative justice and school-based mental health services warrant increased investment” connects the findings to their practical significance.
Types of Abstracts
Informative Abstracts
Informative abstracts provide a complete summary of the paper — purpose, methods, results, and conclusions — and are the standard form in the social sciences, natural sciences, and health professions. An informative abstract allows the reader to determine the paper’s relevance without reading the full text, which is why databases like PubMed and PsycINFO index abstracts: researchers use them to screen thousands of papers for relevance to their own work.
Descriptive Abstracts
Descriptive abstracts describe the paper’s topic and structure without reporting its findings or conclusions. They are shorter than informative abstracts (typically 75 to 150 words) and are used primarily in the humanities, where the argument may resist compression into a few summary sentences. “This paper examines representations of masculinity in Hemingway’s In Our Time through the lens of trauma theory, analyzing how the collection’s narrative fragmentation and emotional restraint construct a post-World War I masculine identity defined by what cannot be spoken” describes the paper’s subject and approach without revealing its conclusions. Students should default to writing an informative abstract unless their instructor specifies otherwise.
Structured Abstracts
Some journals and assignments require structured abstracts — abstracts that use labeled subheadings (Background, Objective, Methods, Results, Conclusions) to organize the summary. Structured abstracts are most common in medical and health sciences research. APA style does not require subheadings in the abstract but permits them. Students should follow the format specified by their assignment.
Abstract Length and Style
Length
APA style specifies an abstract of no more than 250 words, though some journals allow up to 300. Most student assignments follow the APA guideline. An abstract that exceeds the word limit has not been sufficiently compressed; one that falls far short of the limit (under 100 words for a substantial paper) may be omitting essential information. The word limit forces the writer to prioritize: every word must earn its place by conveying information that the reader needs to assess the paper’s relevance and quality.
Style
Abstract prose should be dense, direct, and free of unnecessary words. Introductory phrases (“It is important to note that…”), hedging language (“It might be argued that…”), and rhetorical flourishes that serve the full paper’s readability are inappropriate in the abstract, where every word counts against a strict limit.
The abstract should be written in complete sentences — not as a list of topics or keywords — and should be intelligible as a standalone paragraph. A reader who encounters the abstract in a database search result, separated from the full paper, should be able to understand the paper’s purpose, method, findings, and significance from the abstract alone.
Most abstracts are written in the third person and in the past tense (for methods and results) or the present tense (for conclusions and implications). First person (“I argue that…”) is acceptable in some disciplines but less common in abstract writing than in the body of the paper.
Keywords
APA style requires a list of keywords below the abstract — three to five terms that identify the paper’s major concepts and facilitate database searching. Keywords should be specific and discipline-appropriate: “restorative justice,” “juvenile diversion,” “recidivism,” “school-to-prison pipeline” are better keywords than “criminal justice” or “crime” because they allow a database user to find the paper through targeted searching. Keywords are typically listed on a separate line below the abstract, indented and preceded by the label “Keywords:” in italics.
Common Abstract Errors
Writing the abstract before the paper is finished. An abstract written from the outline or from the rough draft may not match the final paper, which undermines the abstract’s core function as an accurate summary.
Including information not in the paper. The abstract should report only what the paper contains — not additional context, evidence, or implications that the student thought of after finishing but did not include in the body.
Using citations in the abstract. Abstracts generally do not include citations, because they summarize the student’s own paper rather than reporting others’ findings. If a citation is essential (because the paper is a direct response to a specific study), it may be included, but this is the exception rather than the rule.
Copying sentences from the introduction or conclusion. While the abstract covers similar ground, it should be written as original prose — not assembled from sentences extracted from other sections of the paper. The abstract serves a different function (compressed summary for external readers) than the introduction (framing the argument for readers of the full paper) or the conclusion (synthesizing findings for readers who have just read the body).
Vague or incomplete reporting of findings. An abstract that says “The results were significant” without specifying the direction, magnitude, or substance of the results fails to inform the reader. The abstract should report the actual findings, even if briefly: “Participants in the treatment group showed a 15 percent reduction in anxiety symptoms compared to the control group.”
Frequently Asked Questions
Does every research paper need an abstract?
No. Abstracts are standard in APA-formatted papers and in most scientific and social scientific research. They are less common in papers formatted in MLA or Chicago style, which are the dominant formats in the humanities. Students should include an abstract only if the assignment or instructor requires one.
How is an abstract different from an introduction?
The abstract summarizes the entire paper — including findings and conclusions — for readers who may not read the full text. The introduction frames the argument and presents the thesis for readers who will proceed to the body. The abstract is written last and reports what was found; the introduction is written earlier and sets up what will be argued. The two sections overlap in subject matter but serve entirely different audiences and purposes.
Can I write the abstract first as a planning tool?
Writing a preliminary abstract before drafting — sometimes called a “prospective abstract” — can help clarify the paper’s intended scope and argument, similar to writing a proposal. However, this preliminary version must be completely rewritten after the paper is finished to reflect the paper’s actual content. No version of the abstract should be submitted without being verified against the completed paper.
What if my paper exceeds the word count when I try to summarize it?
Compression is the abstract’s defining skill. Focus on the highest-level findings and most significant implications rather than on the details of individual sections. A twenty-page paper with five body sections does not need each section summarized individually in the abstract; instead, the abstract should capture the paper’s overall argument, key evidence, and primary conclusion. If the abstract still exceeds the word limit, cut methodological detail, secondary findings, and qualifications before cutting primary findings and conclusions.
Related Pages
- How to Write a Research Paper — Complete step-by-step guide
- How to Write a Conclusion for a Research Paper — Synthesizing findings and implications
- How to Write an Introduction for a Research Paper — Framing the argument and presenting the thesis
- How to Revise and Edit a Research Paper — Final review before submission
- How to Write a Bibliography for a Research Paper — Formatting references in APA, MLA, and Chicago