The discussion section is where your research findings become an argument. While APA, MLA, and IEEE papers all include a discussion, each style tradition has different expectations about structure, tone, and what the section should accomplish. This guide breaks down the requirements for each.
What All Discussion Sections Share
Regardless of citation style, a strong discussion section does the same core things: interprets results rather than just repeating them, connects findings to existing literature, acknowledges limitations honestly, and draws conclusions that are proportionate to what the data actually shows. The style guide governs formatting and citation mechanics — the logic and structure are driven by the discipline.
Discussion Section in APA Format
APA is used primarily in social sciences, psychology, education, and nursing. Its discussion section has a well-defined structure that mirrors the introduction in reverse:
| Part | Content |
|---|---|
| Opening paragraph | Restate the main finding without repeating numbers; connect directly to the research question |
| Interpretation of results | Explain why results occurred; compare with prior studies using author-date citations (Smith, 2022) |
| Unexpected findings | Address results that contradicted hypotheses; offer plausible explanations |
| Limitations | State clearly and without apology; scope the conclusion accordingly |
| Implications | Practical or theoretical contributions of the findings |
| Future directions | Open questions the study raises |
| Closing | Connects back to the opening research problem; no new information |
APA discussion sections use continuous prose, Level 1 heading («Discussion»), and Level 2 subheadings for subsections if needed. No bullet lists in the main text unless the content clearly warrants it.
Discussion Section in MLA Format
MLA is standard in humanities: literature, languages, history, and cultural studies. The «discussion» in MLA papers rarely appears as a labeled section — instead, analysis and interpretation are woven throughout the body of the argument. When a paper does have an identifiable discussion or conclusion section:
| Feature | MLA expectation |
|---|---|
| Section label | Often «Conclusion» rather than «Discussion»; may be unlabeled |
| Citation format | Parenthetical author-page: (Smith 45) |
| Tone | Argumentative and interpretive; less emphasis on empirical limitations |
| Structure | Returns to the central claim or thesis; synthesizes evidence rather than listing findings |
| Subheadings | Used in longer papers but less common than in APA or IEEE |
In MLA, the discussion equivalent focuses on what the textual evidence means and how it supports or complicates the thesis — not on statistical results or methodological limitations.
Discussion Section in IEEE Format
IEEE papers follow IMRAD structure (Introduction, Methods, Results, and Discussion), but the discussion is often embedded within a Results and Discussion section rather than standing alone. Key differences from APA:
| Feature | IEEE expectation |
|---|---|
| Quantitative emphasis | Strong focus on numerical comparisons with baselines and prior work |
| Citation format | Numbered brackets: «as shown in [3]» |
| Limitations | Addressed but often briefer than in APA; focused on technical constraints |
| Future work | Often a separate short section or the final paragraph of the discussion |
| Tone | Technical, precise, third person preferred («The proposed method achieves…») |
Side-by-Side Comparison
| Feature | APA | MLA | IEEE |
|---|---|---|---|
| Section label | «Discussion» (Level 1 heading) | «Conclusion» or unlabeled | «Discussion» or «Results and Discussion» |
| Citation format | (Author, year) | (Author page) | [number] |
| Limitations subsection | Expected and detailed | Rarely explicit | Brief, technical focus |
| Primary discipline | Social sciences, health | Humanities | Engineering, CS, applied sciences |
| Tone | Objective, third/first person | Argumentative, first person common | Technical, third person preferred |
| Future work | Last paragraph of discussion | Implied through open questions | Often a separate section |
Common Mistakes Across All Styles
- Repeating results instead of interpreting them — the discussion explains the why, not the what
- Introducing new data or citations not referenced earlier — the discussion synthesizes; it does not expand the literature review
- Overgeneralizing conclusions — keep claims proportionate to your sample, method, and findings
- Ignoring contradictory results — unaddressed anomalies undermine credibility in all three styles
- Ending abruptly without a closing statement — every discussion needs a sentence that returns to the original research question
For citation formatting in APA, IEEE, or any other style, see the guides in the Normas APA resource center.