A psychology research paper follows a predictable structure: title page, introduction, method, results, discussion, and references. Once you understand what each section needs to accomplish, the writing process becomes far more manageable. The key is knowing what belongs where and how to format it all according to APA style, which is the standard in psychology.
Start With the Right Page Order
APA style (7th edition) requires pages in this order: title page on page 1, the body of your paper starting on page 2 (with any tables or figures embedded in the text), and your reference list beginning on a new page after the text. If your instructor requires an abstract, it goes on page 2, pushing the body text to page 3.
Each main section of the body (Method, Results, Discussion) gets a Level 1 heading, which is bold and centered. One detail that trips up many students: do not label your introduction with the heading “Introduction.” APA assumes the reader knows the paper begins with an introduction. Instead, place your paper’s title at the top of page 2, then begin writing.
Writing the Introduction
Your introduction does three things. It establishes the broader topic and why it matters, reviews the most relevant prior research, and narrows toward your specific research question or hypothesis. Think of it as a funnel: start wide, then get specific.
The literature review portion is not a list of summaries. Each study you mention should serve a purpose, either building the rationale for your study or identifying a gap your research fills. Connect the studies to each other. Show how one finding led to the next question, and how that question eventually leads to yours. By the final paragraph of your introduction, the reader should understand exactly what you tested and why, with your hypothesis stated clearly.
The Method Section
The method section tells the reader exactly how you conducted your study, with enough detail that someone else could replicate it. It typically contains three or four subsections.
Participants. Describe who took part in your study, how many there were, and how you recruited them. Include relevant demographics like age range, gender breakdown, and any other characteristics important to your research. State your inclusion and exclusion criteria, meaning who was eligible to participate and who was not. If your study involved human subjects, note that you received approval from your institution’s review board (IRB) and that participants gave informed consent.
Materials. Describe the tools you used: surveys, questionnaires, experimental stimuli, software, or equipment. If you used a published scale (like a depression inventory or personality measure), name it and cite it. Mention the number of items and what the scale measures.
Procedure. Walk through what happened during the study from the participant’s perspective, step by step. What instructions did they receive? What tasks did they complete? In what order? How long did the session last? If your study had multiple conditions, describe how participants were assigned to each one.
Data Analysis. Briefly describe the statistical tests you used and why they were appropriate. Mention the software and version number. If you conducted a power analysis to determine your sample size, report it here.
Presenting Your Results
The results section reports what you found, nothing more. Present your statistical findings without interpreting them or speculating about what they mean. That part comes later. Think of this section as laying out the evidence for the reader to see before you make your argument in the discussion.
Start with descriptive statistics (means and standard deviations for your key variables), then move to the inferential statistics that test your hypothesis. When reporting statistics, APA has specific formatting rules. Report exact p-values to two or three decimal places (for example, p = .03), but write p-values smaller than .001 simply as p < .001. Do not put a zero before the decimal point for statistics that cannot exceed 1, like p-values and correlations. So it's p = .04, not p = 0.04. Report most statistics to two decimal places, and italicize statistical symbols like t, F, p, and d.
Include effect sizes alongside your test statistics. An effect size tells the reader how large the difference or relationship actually is, not just whether it was statistically significant. A study can produce a statistically significant result that is practically tiny, so effect sizes give the reader the full picture.
Writing the Discussion
If the results section tells the reader what you found, the discussion tells them what it means. Open by stating whether your findings supported your hypothesis, then move into interpreting the results.
Connect your findings back to the studies you reviewed in the introduction. Do your results align with previous research, or do they contradict it? If there’s a discrepancy, offer possible explanations. This is where you get to think critically and make arguments, but keep them grounded in the data rather than drifting into pure speculation.
Address the limitations of your study honestly. Every study has them, whether it’s a small sample size, a reliance on self-report measures, or a narrow demographic. Acknowledging limitations does not weaken your paper. It shows you understand the boundaries of what your data can claim. After discussing limitations, you can briefly suggest what future studies might do differently or what questions remain open.
Getting Citations Right
In-text citations in APA follow an author-date format. When you paraphrase an idea, include the author’s last name and the year of publication, like (Smith, 2021). You do not need a page number for paraphrased material. When you directly quote someone, you do need the page number: (Smith, 2021, p. 45) for a single page, or (Smith, 2021, pp. 45-47) for a range.
Short quotations (under 40 words) go inside quotation marks within your paragraph. Quotations of 40 words or longer get formatted as a freestanding block: start on a new line, indent the entire passage half an inch from the left margin, and drop the quotation marks. The citation goes after the closing punctuation in a block quote, which is the opposite of a short quote.
For sources without page numbers (like websites), reference another identifying element instead, such as a paragraph number or section heading.
Formatting the Reference List
Your reference list starts on a new page with “References” centered and bolded at the top. Every source you cited in the text must appear here, and every entry here must have a corresponding citation in the text.
The trickiest part for most students is handling DOIs and URLs correctly. Include a DOI for any work that has one, regardless of whether you read the print or online version. Format it as a hyperlink: https://doi.org/xxxxx. If a work has both a DOI and a URL, include only the DOI. For online sources without a DOI from regular websites, include the URL. For sources you accessed through an academic database like PsycINFO that don’t have a DOI, do not include the database name or a URL. Just format the reference as you would a print source, since those works are widely available through multiple databases.
Do not add a period after a DOI or URL, because it can break the link. And you no longer need to write “Retrieved from” before a URL or DOI. Just place it at the end of the entry.
Writing With Bias-Free Language
APA style requires language that is precise and free of bias when describing people. This applies to age, disability, gender, race, ethnicity, sexual orientation, and socioeconomic status. Use the terms that the communities you’re writing about use for themselves. Be specific: “older adults” is better than “the elderly,” and naming a particular ethnic group is better than using broad categories when your data supports that specificity.
When referring to people in your study, call them “participants” rather than “subjects.” Describe people using person-first language when appropriate (“people with depression” rather than “depressed people”), though identity-first language is preferred by some communities, so context matters. The broader principle is to describe people with the same respect and specificity you’d want applied to yourself.
Writing the Abstract
The abstract is typically the last thing you write, even though it appears near the beginning of the paper. Limit it to 250 words. In that space, you need to cover the research question, a brief mention of your method (study design, sample, and sample size), your key results, and the implications of your findings. Aim for one to two sentences on each of those topics. The abstract helps readers decide whether to read your full paper, so make every sentence count. Do not include citations in the abstract, and avoid vague language. State your findings directly.