How a thesis and an article differ

FeatureThesisResearch article
PurposeShow the examiners you can do researchCommunicate a new finding to the research community
LengthUsually 80–200 pages or moreUsually 4,000–8,000 words (per journal guidelines)
AudienceSupervisor, advisers and examinersSpecialist researchers in the field
LiteratureA separate, detailed chapterA few focused paragraphs within the introduction
FocusEverything that was doneOnly the findings that make up the main message
StructureFive chaptersIMRaD: Introduction, Methods, Results and Discussion

Before you start

  • Agree with your supervisor: settle the target journal, author order and corresponding author from the start. Many universities have specific rules for articles drawn from theses.
  • Define the main message: write in one or two sentences what the thesis's most important finding is. Anything that does not support this message stays out of the article.
  • One article or several? If the thesis has several independent questions, it may yield more than one article; but slicing one finding into several small papers (salami slicing) is research misconduct.
  • Choose the journal before writing: read its scope, indexing, language, word limit and format in the author guidelines and write to them from the start.
  • Avoid predatory journals: journals that guarantee fast acceptance for a fee are usually fake or untrustworthy. Check indexes such as Scopus and Web of Science.
  • Affiliation: write your university's name exactly as your university requires.

Transfer map: which article section does each thesis chapter go into?

Thesis chapter or sectionArticle sectionWhat is transferred
Thesis titleArticle titleRewritten around the main message, usually shorter and more precise
Thesis abstractArticle abstractWritten from scratch; 150–250 words, following the journal's structure
Chapter 1: problem, significance, objectives, questions and hypothesesIntroductionContext, problem, gap and aim; hypotheses at the end of the introduction or in a hypotheses section
Chapter 2: theory and literatureIntroduction (or a short literature/theory section)Only the studies and theories needed to justify the questions and hypotheses — usually about a tenth of chapter 2
Chapter 3: methodologyMaterials and MethodsDesign, population and sample, instruments, validity and reliability, procedure and analysis — concise but complete
Chapter 4: resultsResultsOnly findings related to the main message; selected tables and figures
Chapter 5: discussion, conclusion, limitations and suggestionsDiscussion and conclusionInterpretation, comparison with other studies, implications, limitations and future research
Appendices (questionnaire, extra tables)Supplementary materialIf the journal allows it
Reference listReferencesOnly sources cited in the article, updated and in the journal's style

Chapter introductions, textbook definitions, the history of the topic, software descriptions and repetitive descriptive tables usually do not make it into the article.

Title

  • The title should state the main finding or topic precisely and work well in database searches.
  • Thesis titles are usually long; trim unnecessary parts such as “An investigation of” or “A case study of” where possible.
  • Check the journal's title-length limit.

Abstract and keywords

The abstract is the most-read part of an article, and editors and reviewers often decide based on these few lines. Do not copy the thesis abstract; rewrite it from the final article text.

Abstract partWhat to writeApproximate length
Background and aimThe problem in one sentence and the study's aim1–2 sentences
MethodsDesign, sample and size, instruments and analysis2–3 sentences
ResultsThe key results with numbers (coefficients, percentages, significance levels)2–4 sentences
ConclusionThe main message and its implication1–2 sentences

Many journals require a structured abstract with these headings. Do not include citations, undefined abbreviations or claims that are not in the text. Choose 3–6 keywords that do not simply repeat the title; some journals require keywords from standard lists (such as MeSH in medicine).

Introduction

The article introduction compresses thesis chapters 1 and 2 into a few paragraphs. A funnel structure works best:

  1. Context: the general topic and its importance, with sources (1 paragraph).
  2. What is known: what previous research has shown — a focused synthesis, not a list of individual studies (1–3 paragraphs).
  3. Gap: what we still do not know, or conflicting results (1 paragraph).
  4. This article's aim: the aim, questions or hypotheses and, if needed, the originality (1 short paragraph).

In a thesis you write a paragraph per study; in an article you combine several agreeing studies in one sentence with several citations: “Several studies have reported a positive relationship between these variables (Ahmed, 2021; Smith, 2021; Lee et al., 2022)”.

Update the literature. If some time has passed since your defence, search for and add newly published studies; reviewers notice outdated references.

Methods

The key standard here is reproducibility: another researcher should be able to repeat the study from this section. Summarise thesis chapter 3, but do not drop anything essential.

  • Design: the type of study (for example descriptive-correlational, quasi-experimental with a control group, qualitative with a … approach).
  • Participants: population, sample size and how it was set, sampling method, inclusion and exclusion criteria and key demographics.
  • Instruments: name and source, number of items and scoring, and validity and reliability indices in this study.
  • Procedure: data collection steps, time and place.
  • Data analysis: tests, software and version, and significance level.
  • Ethics: informed consent and ethics approval (if required).

Textbook definitions (“correlational research is research that…”) and general software descriptions are not needed. Methods are usually written in the past tense: “Data were collected with the … questionnaire”.

Results

  • Present findings in the order of the questions or hypotheses.
  • Only report; leave interpretation for the discussion.
  • Thesis chapter 4 is usually full of tables; keep only the tables and figures that build the main message, and merge descriptive tables into one.
  • Do not repeat table figures in the text; point to the table's main message: “As Table 2 shows…”.
  • Report statistics fully: the statistic, degrees of freedom, significance level and, where possible, effect size and confidence interval.
  • Number tables and figures in order of appearance; table titles go above and figure captions below (unless the journal says otherwise).
  • Also report non-significant results related to your hypotheses; leaving them out is selective reporting.

Discussion

The discussion matters most to reviewers; it is where you show what the findings mean. A suggested structure:

  1. Summary of the main finding in one or two sentences (without repeating numbers).
  2. Comparison with previous studies: where results agree or disagree and why; offer possible explanations for differences (population, instruments, context…).
  3. Theoretical explanation: how the findings are explained by the study's framework.
  4. Implications: what the results mean for practice, policy or research.
  5. Limitations: state the study's real limitations honestly (sample, method, instruments, generalisability).
  6. Suggestions for future research.

Common mistake: repeating the results sentence by sentence, or claiming more than the data show — for example drawing causal conclusions from a correlational study.

Conclusion

A short paragraph stating the article's main message and its most important implication. Some journals want a separate conclusion section; others treat it as the end of the discussion. Do not introduce new findings or new citations in the conclusion.

End matter and declarations

Most journals ask for these sections after the main text:

  • Acknowledgements: usually where you state that the article is drawn from a master's thesis or PhD dissertation titled … at … university.
  • Funding: the funding organisation or grant, if any.
  • Conflict of interest: declare whether there are any conflicts of interest.
  • Ethics approval: the ethics committee approval number (if required).
  • Author contributions: each author's role in the research and writing.
  • Data availability: how the data can be accessed.
  • Declaration of AI use: if you used AI tools in writing, declare the tool and how it was used according to the journal's policy. AI cannot be an author, and the authors are responsible for all content.

References

  • List only sources cited in the article; do not move the whole thesis reference list across.
  • Format references in the journal's style (APA, Vancouver, Harvard…); EndNote, Zotero and Mendeley make switching styles easy.
  • For international journals, translate non-English references or mark them as the journal requires (for example “(in Persian)” or “(in Arabic)”).
  • Double-check every source, author names, year and DOI.

How to shorten a thesis

  • Merge chapters 1 and 2 into a three-to-five-paragraph introduction.
  • Remove definitions, history, textbook classifications and general theory.
  • Combine similar tables into one and drop charts that repeat table information.
  • Shorten long sentences and use the active voice where possible.
  • Merge repeated parts across chapters (such as hypotheses stated in several places).
  • After writing, read the article as someone who has not seen the thesis; cut every sentence that does not support the main message.

Common mistakes

  • Copying thesis text directly: theses are registered and indexed, and journal plagiarism checkers find identical text. Rewrite the article and declare its origin.
  • Putting all of chapter 2 into the article
  • Reporting every analysis and table instead of the main findings
  • A discussion that only repeats the results
  • Inconsistent numbers between the abstract, text and tables
  • Ignoring the journal's format and word limit
  • Submitting the same article to several journals at once (misconduct)
  • Adding or removing authors without the agreement of all contributors

Checklist before submitting to a journal

  • The article fits the journal's scope and follows its author guidelines.
  • The title, abstract and keywords match the final text.
  • Numbers in the abstract, text, tables and figures are identical.
  • All tables and figures are numbered, titled and cited in the text.
  • Every in-text citation is in the reference list, and vice versa.
  • Declarations (conflict of interest, funding, ethics, author contributions and AI use, if any) are complete.
  • All authors have read the final version and agree to submission.
  • A cover letter to the editor is ready: the title, why it matters and confirmation it is not under review elsewhere.
  • You have checked grammar and style (for English articles, for example with Kajino's grammar checker) and run a plagiarism check.

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Next guide: How to write a thesis proposal

Frequently asked questions

Usually not; most journals accept articles drawn from theses, provided the text is rewritten and its origin (the thesis) is declared. Always read the target journal's policy.

In many universities yes, following university rules; agree on author order and the corresponding author with your supervisor before writing.

Usually 4,000–8,000 words excluding references, but the real limit is the one in the target journal's author guidelines.

If the thesis has independent, valuable questions or findings, possibly more than one; but splitting one finding into several small articles is not acceptable.

Only a small part — the studies and theories needed to justify the questions and hypotheses — goes into the introduction or a short literature section.