How to Write a Research Paper Introduction: 5-Part Framework with Examples

The introduction to a research paper is where you set the stage for everything that follows. It’s also the section most students struggle with—and the one reviewers read first to decide whether your paper is worth their time.

Here’s the straightforward answer: a strong research paper introduction follows a five-part framework that moves from broad context to your specific research question. Each part builds on the previous one, creating a logical chain that tells readers exactly why your study matters and what you intend to investigate.

The five parts are: (1) introduce your topic, (2) describe the background, (3) establish your research problem, (4) specify your objectives, and (5) map out your paper. Mastering this framework—and understanding what goes wrong when you skip or misorder any step—is what separates papers that get published from ones that get rejected.

This guide walks you through each component with concrete examples across disciplines.

What Is a Research Paper Introduction (and How It Differs from an Essay Introduction)?

A research paper introduction is not an essay introduction. In a persuasive or expository essay, the introduction sets up a broad topic and ends with a thesis statement that the rest of the essay proves. In a research paper, the introduction has a more specific job: it must convince readers that a gap exists in current knowledge and that your study addresses that gap.

Think of it like an inverted pyramid: you start broad with the general topic, narrow progressively through background and context, identify the specific problem your research addresses, and finish at the narrowest point—your research question or hypothesis.

If your introduction doesn’t follow this narrowing structure, reviewers may see it as unfocused, incomplete, or redundant with the abstract. The following framework, adapted from authoritative writing guides at Scribbr, UCI Libraries, and the UCLA Writing Center, provides a proven template.

The 5-Part Research Paper Introduction Framework

Part 1: Introduce Your Topic

What this does: Captures the reader’s attention and tells them what the paper is about.

The opening of your introduction should be a strong hook—something striking that signals relevance. You can use a startling statistic, a provocative question, a significant finding, or a brief anecdote. The key is to move beyond generic opening statements and anchor your topic in something concrete and current.

Example (STEM):

The global burden of antimicrobial resistance is projected to reach 10 million deaths annually by 2050 if current trends continue, costing up to $100 trillion in cumulative economic impact (O’Neill et al., 2016). Despite this projection, the rate of new antibiotic discovery has declined steadily over the past three decades.

Example (Social Sciences):

Between 2010 and 2022, the number of U.S. students identifying as LGBTQ+ increased by over 20%, yet campus mental health services report that LGBTQ+ students are 2.8 times more likely to experience depression and anxiety than their peers (Crawford, 2024; SAMSHA, 2023).

Example (Humanities):

Virginia Woolf’s Mrs. Dalloway (1925) and William Faulkner’s The Sound and the Fury (1929) emerged in the same decade, yet they employ radically different techniques to portray the psychological fragmentation of their protagonists.

What to avoid: Vague, broad statements like “This paper examines the impacts of climate change on agriculture” or “Social media has many effects on teenagers.” These are true but not specific enough to signal what your paper actually does.

Part 2: Describe the Background

What this does: Provides the necessary context so readers understand where your research fits.

The background section differs depending on whether your paper is argumentative or empirical.

For argumentative papers, you provide a concise overview of the general landscape: key debates, prominent viewpoints, and the theoretical frameworks that shape the discussion. You don’t need a full literature review here—just enough context to ground your argument.

For empirical papers, you provide a miniature literature review: a sketch of the most relevant prior research, highlighting what has been found, what methods have been used, and what limitations remain. This section answers the question: “What do we already know about this topic?”

Example (Empirical paper):

Various empirical studies have examined the relationship between social media use and body image issues among adolescent girls (Tiggermann & Slater, 2013; Meier & Gray, 2014). These studies consistently find that visual and interactive aspects of the platform have the greatest influence. However, highly visual social media (HVSM) platforms such as Instagram have yet to be robustly researched in longitudinal studies.

Example (Argumentative paper):

A recent study (RIVM, 2019) shows that cattle farmers account for two-thirds of agricultural nitrogen emissions in the Netherlands. These emissions result from nitrogen in manure, which can degrade into ammonia and enter the atmosphere. The study’s calculations show that agriculture is the main source of nitrogen pollution, accounting for 46% of the country’s total emissions. By comparison, road traffic and households are responsible for 6.1% each, and the industrial sector for 1%.

What to avoid: Providing unnecessary background that belongs in the body of the paper. The introduction should offer just enough context—not a comprehensive literature review. If more background is essential to your paper, it belongs in the body, not the introduction.

Practical tip: Keep background information concise and focused. You’re writing a sketch, not a painting. The UCI Libraries checklist recommends reviewing “the pertinent literature to orient the reader” but warns against “repeating the abstract” or “providing unnecessary background information.”

Part 3: Establish the Research Problem (Identify the Gap)

What this does: States clearly what is missing, unresolved, or contradictory in the existing literature—and why that gap matters.

This is the most critical part of your introduction. Without a clear research gap, your study appears redundant or unnecessary. The gap section answers the question: “What has not been done yet, and why does it matter?”

You can frame the gap in several ways:

• A direct gap: No one has studied X yet
• A methodological gap: Previous studies used approach Y; a better approach is Z
• A population gap: Previous research focused on group A; your study addresses group B
• A contradiction gap: Existing studies disagree; your study reconciles the discrepancy

Example (STEM):

While previous studies have examined the effects of aerobic exercise on depression levels among adult populations (Gujral et al., 2019; Smith & Lee, 2020), limited research has investigated whether different types of exercise—such as anaerobic training—differentially impact depression in young adults aged 18–25.

Example (Social Sciences):

Although numerous studies have documented the correlation between social media use and sleep disruption among teenagers (Van den Eijnden et al., 2021), few have explored whether parental internet rules before bedtime moderate this relationship.

Example (Humanities):

While scholars have extensively analyzed the narrative techniques in modernist fiction, comparatively few studies have examined how both Woolf and Faulkner use stream-of-consciousness to depict psychological fragmentation side by side.

Phrase templates for signaling the gap:

• “Although X has been studied in detail, insufficient attention has been paid to Y.”
• “The implications of X deserve to be explored further.”
• “It is generally assumed that X. However, this study suggests that Y.”

What to avoid: Ignoring the research gap entirely. A review that says “Many studies have examined exercise and mental health” without specifying what aspect hasn’t been studied is weak and will be flagged by reviewers as insufficient justification.

Part 4: Specify Your Objectives (Thesis / Research Question / Hypothesis)

What this does: States precisely what your study will do or investigate.

At this point, the reader should know exactly what your paper will accomplish. The way you frame this varies depending on your paper type:

For argumentative papers, you present a thesis statement—one or two sentences that clearly state the position your paper will argue. The thesis should be specific, debatable, and directly answer the gap you identified.

For empirical papers, you present a research question (and optionally a hypothesis). The research question should be clear, focused, and answerable through your methodology.

Example (Argumentative paper):

This paper argues that the Dutch government must stimulate and subsidize livestock farmers, particularly cattle farmers, to transition to sustainable vegetable farming.

Example (Empirical paper):

This study set out to answer the following question: What effects does daily use of Instagram have on the prevalence of body image issues among adolescent girls?

Example with hypothesis:

We investigated the effects of daily Instagram use on the prevalence of body image issues among adolescent girls. It was hypothesized that daily Instagram use would be associated with an increase in body image concerns and a decrease in self-esteem ratings.

Example (STEM):

This study aims to investigate the effects of rising temperatures and changing precipitation patterns on crop yields in the Midwest United States from 2000 to 2010. The specific objectives are: (1) assess the impact of temperature changes on corn and soybean yields, (2) analyze how variations in precipitation affect crop growth, (3) identify adaptive strategies employed by farmers in the region.

Pro tip: When you have more than one aim, be clear about how many main objectives you have. Experts recommend focusing on one major question per paper. If you have supplementary analyses, it’s better to note them in the discussion rather than presenting them as core aims.

What to avoid: A thesis statement that is too broad and vague. “In this paper, I will discuss climate change” lacks specificity and direction. Compare:

Part 5: Map Out the Paper (Roadmap)

What this does: Gives the reader a quick tour of what comes next.

The final part of your introduction is often a brief roadmap that outlines the structure of the rest of the paper. Whether you include this depends on your paper’s organization:

• For standard scientific papers (IMRaD structure: Introduction, Methods, Results, Discussion), a roadmap is often unnecessary because the structure is predictable.
• For argumentative papers or papers with less predictable structure, a roadmap helps orient the reader.

Example:

This paper first discusses several examples of survey-based research into adolescent social media use, then goes on to present the results of our longitudinal study, followed by a discussion of policy implications.

Example (more concise):

The remainder of this paper proceeds as follows: Section 2 reviews the relevant literature; Section 3 outlines the methodology; Section 4 presents the results; and Section 5 discusses the implications.

What to avoid: Repeating your abstract word-for-word. The introduction should introduce the paper; the abstract should summarize it. If you restate the abstract in the introduction, reviewers will see it as redundancy.

Practical tip from San Jose State University: For longer papers, conclude your introduction with a brief roadmap. However, keep it concise—typically one or two sentences in present tense.

Research Paper Introduction Examples by Discipline

STEM Research Paper Introduction (Example)

The global burden of antimicrobial resistance is projected to reach 10 million deaths annually by 2050 if current antibiotic discovery rates continue (O’Neill et al., 2016). Despite this projection, the pipeline for new antibiotic classes has slowed dramatically. Recent studies have focused on existing antibiotic repurposing and bacterial metabolism (Gujral et al., 2019; Smith & Lee, 2020), but limited attention has been given to alternative antimicrobial approaches such as phage therapy. This study aims to investigate the effectiveness of bacteriophage-based therapy as a complementary treatment for multidrug-resistant E. coli infections in vitro. The specific objectives are: (1) evaluate the inhibitory effect of three phage combinations against MDR-E. coli strains, (2) assess the emergence of phage resistance over 20 replication cycles, and (3) compare the efficacy of combined phage therapy versus single-phage treatment. The remainder of this paper outlines the experimental design, followed by results, discussion, and clinical implications.

Social Sciences Research Paper Introduction (Example)

Between 2010 and 2022, the proportion of U.S. students identifying as LGBTQ+ increased by over 20% (Crawford, 2024). Yet campus mental health services report that LGBTQ+ students are 2.8 times more likely to experience depression and anxiety than their peers (SAMHSA, 2023). While previous research has established a general correlation between social media use and mental health difficulties among adolescent girls (Tiggermann & Slater, 2013; Meier & Gray, 2014), few studies have examined whether parental internet rules before bedtime moderate the relationship between social media exposure and anxiety symptoms among LGBTQ+ youth. This study investigates the moderating effect of parental internet monitoring on social media use and anxiety levels among 15,000 U.S. students aged 13–18. The remainder of this paper reviews relevant literature, describes the methodology, presents the results, and discusses policy implications.

Humanities Research Paper Introduction (Example)

Virginia Woolf’s Mrs. Dalloway (1925) and William Faulkner’s The Sound and the Fury (1929) emerged in the same decade, yet they employ radically different techniques to portray the psychological fragmentation of their protagonists. While Woolf uses stream-of-consciousness to blur the boundary between interior thought and external reality, Faulkner fragments his narrative through multiple unreliable narrators and non-linear chronology. Although scholars have extensively analyzed modernist narrative techniques individually, few studies have examined how both authors use temporal disruption simultaneously to depict the crisis of identity in post-war Europe. This paper argues that Woolf and Faulkner represent two distinct but complementary approaches to representing psychological fragmentation: Woolf’s temporal fluidity versus Faulkner’s structural fracture. The remainder of this paper first compares the narrative techniques of both authors, then analyzes how temporal disruption reflects the broader modernist crisis of identity, and finally considers the implications for post-war literary studies.

Common Research Paper Introduction Mistakes (and How to Fix Them)

Mistake 1: Writing the Introduction Before the Paper

Many students begin with the introduction and treat it as the first thing they write. However, the introduction is often one of the last parts of the paper you’ll write. You can’t introduce what you haven’t written yet.

Fix: Write the introduction after you’ve drafted the body of the paper. This is much easier because you know exactly what you’ve written and what you’re arguing. As Scribbr notes, “The introduction is often one of the last parts of the research paper you’ll write, along with the conclusion.”

Mistake 2: Overly Broad or Vague Statements

“This paper examines the impacts of climate change on agriculture.”
“Social media has many effects on teenagers.”

These are technically true but fail to specify what your paper actually examines.

Fix: Narrow your focus. Be specific about the topic, the population, and the scope. Compare:

“This study aims to investigate the effects of rising temperatures and changing precipitation patterns on crop yields in the Midwest United States from 2000 to 2010.”

Mistake 3: Repeating the Abstract

Some students simply paste their abstract into the introduction. This is redundant and wastes space.

Fix: Use the introduction to introduce and orient; use the abstract to summarize. They serve different purposes.

Mistake 4: Insufficient Background or Literature Review

“Many studies have examined exercise and mental health. This paper explores the relationship between physical activity and depression.”

This is far too brief and doesn’t establish any gap.

Fix: Provide a mini-literate review that summarizes key findings and identifies what hasn’t been done. Include specific studies, methodologies, and limitations.

Mistake 5: Ignoring the Research Gap

If your introduction doesn’t clearly identify what gap you’re filling, reviewers will question why your study is necessary.

Fix: Make the gap explicit. Use phrases like “Although X has been studied, insufficient attention has been paid to Y” or “The implications of X deserve further exploration.”

Mistake 6: Overly Technical Language

“The present study examines the metacognitive strategies employed by individuals in the domain of second language acquisition, specifically focusing on the interaction between declarative and procedural memory systems in the process of syntactic parsing.”

Fix: Tailor language to your audience. Simplify jargon where possible. Define technical terms. Use a relatable example: “This study looks at the thinking strategies people use when learning a second language.”

Mistake 7: Poor Organization and Flow

When ideas are presented without clear connections, the introduction feels disjointed.

Fix: Follow the inverted pyramid structure. Start broad, narrow progressively, and use transitional sentences between paragraphs. Create a clear logical sequence from context → background → gap → objective.

The Research Paper Introduction Checklist

Use this checklist to verify your introduction is complete and effective:

• Hook: Does the opening grab attention and signal relevance?
• Topic introduced: Is the general subject clearly stated?
• Background: Is sufficient context provided without overwhelming detail?
• Research gap: Is the specific gap or problem clearly identified?
• Literature review: Are key prior studies mentioned with specificity?
• Objective stated: Is the research question, hypothesis, or thesis clear?
• Roadmap: Does the introduction outline the paper’s structure (when appropriate)?
• Conciseness: Is the introduction roughly 10–15% of the total paper length?
• No abstract repetition: Is the introduction distinct from the abstract?
• Audience-appropriate: Is language accessible but academically rigorous?

Research Paper Introduction vs. Research Proposal Introduction: What’s Different?

A common point of confusion is the difference between introducing a research paper and introducing a research proposal. They serve similar purposes but have different audiences and expectations.

If you’re writing a research proposal for graduate school, you may want to adapt this framework accordingly. For a detailed research proposal guide, see our Research Proposal Writing Guide for High School Students and our Research Proposal Advanced Topics covering methodology and institutional requirements.

Frequently Asked Questions

How long should a research paper introduction be?

A research introduction should generally make up about 10% to 15% of your total paper’s word count. For a 5,000-word paper, aim for 500–750 words in the introduction. For shorter papers, the introduction may be as brief as 300 words.

Should I write the introduction first or last?

Write the introduction last. You can’t introduce what you haven’t written yet. Once you’ve drafted the body of your paper, writing the introduction becomes much easier because you know exactly what your paper covers.

What’s the difference between a research question and a thesis statement?

• A thesis statement presents a claim or argument that your paper will defend. It’s used in argumentative papers.
• A research question poses the specific question your study seeks to answer. It’s used in empirical papers.
• A hypothesis predicts the expected outcome of your study. It’s used alongside research questions in quantitative research.

Can I use the same framework for argumentative and empirical papers?

Yes—but with adjustments. The five-part framework applies to both, but argumentative papers lean more on background and argumentation, while empirical papers lean more on literature review and methodology. The structure is similar; the emphasis differs.

What should I do if my introduction feels too repetitive?

Repetition often happens when the introduction mirrors the abstract or the opening paragraph echoes the thesis. Check for these overlaps:

• If your opening sentence repeats the thesis, rewrite the opening to be more engaging.
• If your introduction mirrors the abstract, focus the introduction on introducing and orienting, not summarizing.
• If your background section repeats the literature review, narrow the background to only the most essential context.

Conclusion: Your Next Steps

Writing a strong research paper introduction doesn’t require a genius-level opening—it requires a structured approach. Follow the five-part framework:

1. Introduce your topic with a relevant hook
2. Describe the background with focused context
3. Establish the research problem by identifying the gap
4. Specify your objectives with a clear thesis or research question
5. Map out the paper with a concise roadmap

Once you’ve written the body of your paper, return to the introduction and refine it. Read it aloud to check flow. Verify that each section builds on the previous one. And remember: reviewers may judge your entire paper based on the quality of the introduction alone, so invest the time to make it compelling.

If you need a professional review of your research paper, or if you’d rather have a custom-written paper that follows this framework, you can order a research paper from Essays-Panda.com today. Our writers specialize in structuring introductions that capture reviewer attention and set a strong foundation for every section of your paper.

Related Guides

• How to Write an Empirical Research Paper: Complete Step-by-Step Guide for Students
• Research Paper Methodology Section: Complete Guide
• Literature Review Writing: Search to Synthesis Guide
• Research Proposal Advanced Topics
• Research Proposal Writing Guide

Last updated: May 28, 2026