What is a Research Problem? Definition, Ideas, Examples

A research problem is a specific gap in knowledge, a contradiction in an established theory, or a real-world challenge that a researcher aims to address through systematic inquiry. It is the foundation of every research project: it sets the scope, guides the design, and justifies the study to supervisors, peers, and funders.

This guide covers what a research problem is, the different types, how to define one step by step, what distinguishes a strong problem from a weak one, common mistakes to avoid, and targeted advice for students and early-career researchers.

Glossary of Key Terms

Key Takeaways

• A research problem is not a topic, a question, or a solution. It is a clearly bounded gap or challenge that justifies a study.
• Every research project begins with a research problem. Without one, the study has no defined purpose or scope.
• The three main types of research problems are theoretical, applied, and action research problems.
• A strong research problem is novel, significant, feasible, specific, and grounded in evidence.
• The research topic is the broadest level; the research problem narrows the focus; the research question makes it answerable; the hypothesis makes it testable.
• Common mistakes include choosing a problem that is too broad, selecting a topic rather than a problem, and skipping a thorough literature review.
• A well-written problem statement answers four questions: What is the gap? Who is affected? What has already been done? Why does it matter?

What Is a Research Problem?

A research problem is the primary statement of a knowledge gap, contradiction, or challenge in a field that forms the foundation of a research project. It is not the same as a research topic (which is broad), a research question (which is specific and answerable), or a hypothesis (which is testable). The research problem sits between the topic and the question: it narrows the topic to a specific unsolved issue and frames why that issue deserves systematic investigation.

A clear research problem does three things:

1. it orients the reader to the significance of the topic,
2. places the problem in a specific context, and
3. defines the parameters within which the study will be conducted.

What Is the Difference Between a Research Topic, a Research Problem, and a Research Question?

These three terms are often confused. The table below shows how they relate, using online learning as a worked example.

Why Is the Research Problem Important?

Without a well-defined research problem, a study has no clear purpose. Researchers without one tend to collect data aimlessly, produce findings with no focused contribution, and struggle to write a coherent introduction. The research problem is the anchor: it connects the literature review, the methodology, and the analysis to a single central purpose.

A research problem also answers the “So what?” question that every supervisor, reviewer, and funder asks: why does this matter, and what will change if it is answered?

What Are the Characteristics of a Strong Research Problem?

A strong research problem meets all eight of the following criteria. Using this checklist helps researchers evaluate a candidate problem before committing to it.

What Are the Three Main Types of Research Problems?

Research problems fall into three broad categories based on their purpose and context. These categories are not mutually exclusive; some studies combine elements of two types.

Theoretical Research Problems

Theoretical research problems focus on expanding conceptual knowledge. They do not necessarily involve solving an immediate practical issue; instead, they seek to develop, test, refine, or challenge theories, models, and frameworks. These problems are common in philosophy, theoretical physics, mathematics, sociology, education theory, and the humanities.

Examples by discipline:

Applied Research Problems

Applied research problems focus on finding practical solutions to specific, real-world challenges. They use existing theories and methods to address issues in fields such as healthcare, business, education policy, environmental management, and public administration. The defining feature is a direct orientation toward change or improvement.

Examples by discipline:

Action Research Problems

Action research problems are a specialized form of applied research. They focus on solving a specific, immediate problem within a particular context through a cyclical, collaborative process of planning, action, observation, and reflection. Action research is usually conducted by practitioners, such as teachers, nurses, community organizers, or managers, who are both researchers and participants in the situation being studied.

Examples by context:

How Do the Three Types Compare?

How Do You Define a Research Problem? A Step-by-Step Guide

Defining a research problem is an iterative process, not a one-time decision. The six steps below build on each other; expect to revisit earlier steps as your understanding deepens.

How Do You Write a Problem Statement?

A problem statement is a written paragraph that formally presents the research problem. It must be concise (100 to 200 words), specific, and directly tied to the literature. Use the template below as a starting point.

Problem statement template:

[Background context in 1 to 2 sentences: what is the general situation?] Despite [what has already been studied or done], [the specific gap, contradiction, or challenge that remains] is not well understood / has not been addressed / remains unresolved. [State who is affected and why it matters.] Therefore, this study aims to [brief statement of the research objective].

Worked example (social science):

Mental health challenges among university students have increased significantly over the past decade. While clinical interventions have been widely studied in high-income settings, the effectiveness of peer-support programs at under-resourced universities in sub-Saharan Africa remains largely unexplored. This gap is significant because resource constraints make professional counseling inaccessible for most students in these contexts, leaving peer support as the primary available intervention. Therefore, this study aims to evaluate the impact of structured peer-support programs on self-reported mental health outcomes among first-year students at two Ugandan universities.

Worked example (natural science):

Antibiotic-resistant bacterial strains are a growing public health concern globally. Although resistance mechanisms for commonly prescribed antibiotics are well documented, the rate at which resistance develops under low-dose, long-duration antibiotic exposure in pediatric populations has not been systematically studied. This gap limits the ability of clinicians to formulate safe dosing guidelines for children with chronic infections. Therefore, this study aims to characterize the resistance development timeline in Staphylococcus aureus under sub-therapeutic antibiotic doses in a controlled in vitro model.

What Are the Most Common Mistakes When Identifying a Research Problem?

Awareness of common mistakes allows researchers to avoid them. The table below describes the most frequent errors and how to correct them.

Self-Assessment Checklist: Is My Research Problem Ready?

Answer each question before finalizing the problem statement. Every answer should be yes before proceeding to the research question and methodology.

• Is the problem grounded in at least two peer-reviewed sources that confirm the gap exists?
• Is the problem stated as a gap or challenge, not as a topic or solution?
• Have I identified who is affected by this problem?
• Can I explain in one sentence why it matters if this problem remains unsolved?
• Is the scope specific enough that I can collect data within my timeline and resources?
• Have I identified the key variables or phenomena I will study?
• Has a supervisor, peer, or mentor reviewed and given feedback on the problem statement?
• Are there no obvious ethical concerns, or have those concerns been addressed with my institution?

Guidance for High School Students: Formulating Your First Research Problem

High school research is often the first time a student tries to go beyond summarizing existing knowledge and contribute an original inquiry. The main challenge at this level is learning to distinguish between a topic and a problem, and to scope the problem appropriately for the time and resources available.

Tip 1: Start with a Question You Genuinely Cannot Answer Yet

A research problem must address something that is not already fully known or settled. Begin by listing questions about a topic that genuinely puzzle you. Then check: can you find the definitive answer in one textbook or one Google search? If yes, it is not a research problem; it is a knowledge gap in your reading. If no reliable answer exists for your specific context, population, or angle, you may have a viable problem.

Example:

• Too settled: “What causes air pollution?” (well-documented answer available)
• Viable: “How does traffic pollution levels compare between the industrial zone and the residential zone in my city, and what do residents perceive as the main source?” (local, specific, not previously answered)

Tip 2: Use the “So What?” Test

After drafting a problem, ask: so what? If this remains unsolved, who is affected and how? If you cannot answer that question, the problem may lack significance. A research problem must matter to someone beyond the researcher.

Template for significance statement:

[Problem statement]. If this is not addressed, [specific population] will continue to [specific negative consequence]. Understanding this problem will help [who benefit: teachers, policymakers, the local community, etc.].

Tip 3: Scope the Problem to What You Can Actually Investigate

High school researchers often have limited time (weeks, not years), limited funding, and limited access to data. Scope the problem accordingly. The best high school research problems are local, specific, and manageable.

Tip 4: Write the Problem in One Clear Sentence Before Expanding It

Begin with a single declarative sentence stating the gap. Then expand to a short paragraph. The one-sentence version forces clarity and prevents vague, wide-ranging statements.

Template:

It is not known whether [X] in [specific context or population] because [no study / limited data / conflicting findings], and this matters because [reason].

Example:

It is not known how much the noise level in the school cafeteria affects students’ concentration in the first period after lunch, because no measurement or study has been conducted at this school, and this matters because several teachers have reported a pattern of reduced engagement in that period.

Guidance for Undergraduates: Moving from Course Knowledge to Original Inquiry

Undergraduate researchers have more conceptual background than high school students but typically have less methodological independence than graduate students. The main challenge is learning to use the academic literature to identify gaps rather than to just support arguments.

Tip 1: Use Your Literature Review to Find the Gap, Not to Confirm Your Assumption

Many undergraduates begin with a problem they think exists, then look for sources that confirm it. This approach leads to confirmation bias and weak problem statements. Instead, read widely and let the literature reveal the gap to you: look for phrases such as “further research is needed,” “this relationship has not been studied in,” or “existing studies are limited to.” These phrases in published papers are signposts pointing directly at potential research problems.

Practical step:

Search Google Scholar or your library database for your topic. Open five to ten recent articles. Read only the introduction and conclusion of each. In each conclusion, highlight any sentence that describes a limitation or calls for future research. These are your candidate problems.

Tip 2: Distinguish Between a Research Problem and a Policy Opinion

Undergraduate students sometimes mistake a normative position (“we should do more about X”) for a research problem. A research problem is descriptive, not prescriptive: it identifies what is not known, not what should be done. Once the research has answered the problem, the findings may inform a policy recommendation, but the problem itself must be an empirical or conceptual gap.

Tip 3: Communicate Your Problem to Your Supervisor Clearly and Early

Many undergraduate research projects go off course because students delay showing their problem statement to their supervisor. Share a draft problem statement within the first week of the project. Use the template below when approaching a supervisor.

Email template for sharing a draft problem statement with a supervisor:

Subject: Draft research problem for feedback

Dear [Supervisor’s name],

I am writing to share a draft research problem for your feedback before I proceed to the methodology stage.

Proposed research problem: [Insert one-sentence problem statement.] I have reviewed the following sources that confirm this gap: [List two to three references]. The proposed scope is [brief description: who, where, when].

I would welcome any feedback on whether the scope is appropriate, whether there are key sources I am missing, and whether the problem is feasible within [your timeline].

Thank you for your time. [Your name]

Tip 4: Can You Have More Than One Research Problem in a Study?

For undergraduate projects, one primary research problem is strongly recommended. A study with multiple unrelated problems loses focus and is harder to execute well. However, a single primary problem may be accompanied by one or two closely related sub-problems that together form a coherent inquiry.

Example:

• Primary problem: The factors that predict first-generation university students’ likelihood of dropping out in the first semester are not well understood.
• Sub-problem 1: It is unclear whether financial stress or social belonging is the stronger predictor.
• Sub-problem 2: It is not known whether peer-mentoring interventions mediate the relationship between financial stress and dropout intention.

Guidance for First-Year PhD Students: From Research Interest to Dissertation-Worthy Problem

First-year PhD students face a distinct challenge: moving from a general research interest to a problem that is original enough to justify a three-to-five-year study, significant enough to contribute to the field, and specific enough to be achievable. The pressure to find the perfect problem early is one of the most commonly reported sources of anxiety in doctoral students, and it is largely unnecessary. Most doctoral problems evolve significantly during the first year.

Tip 1: Think of the Problem as a Process, Not a Moment

Problem formulation in a PhD is not a one-time event in week one. It is a process that unfolds over months of reading, discussion, and preliminary investigation. Research published on dissertation problem formation shows that successful doctoral students typically revise their problem statement multiple times, with each revision adding precision and grounding. Expect the problem to shift; this is a sign of intellectual development, not indecision.

Diagnostic questions to guide problem refinement:

• Is the problem new, or is it a slight variation of something already published?
• What would be different in the world if this problem were solved?
• Could someone with my supervisory team’s expertise meaningfully supervise this problem?
• Is this problem currently receiving funding or policy attention, which suggests it is considered significant?

Tip 2: Ground Your Problem in a Theoretical Framework

A PhD research problem needs theoretical grounding: it must connect to one or more established theories that frame what the problem means and why studying it matters. The problem statement should name the theoretical lens and explain the gap in terms of what the theory predicts versus what the empirical evidence shows.

Template for a theory-grounded problem statement:

[Theory X] predicts that [expected relationship or outcome]. However, empirical studies in [specific context] have consistently found [different or inconsistent outcome]. This contradiction has not been resolved, and its implications for [theoretical construct or practical application] remain unclear. This study aims to [proposed approach to addressing the gap].

Example:

Self-determination theory predicts that autonomy-supportive teaching will enhance intrinsic motivation in adult learners. However, empirical studies of adult vocational training programs in collectivist cultural settings have consistently found null or negative effects. This contradiction has not been resolved, and its implications for how SDT applies in non-Western educational contexts remain unclear. This study aims to examine whether cultural orientation moderates the relationship between autonomy support and intrinsic motivation in adult vocational learners in Indonesia.

Tip 3: Map Your Problem Against Existing Literature Systematically

Before finalizing a PhD research problem, conduct a structured literature map. This is a visual or tabular inventory of what has been studied, by whom, with which methods, in which contexts, and with which outcomes. The map reveals precisely where the gap lies and allows you to justify the problem with evidence rather than assertion.

Basic literature map template (three-column version):

Populate the table with 15 to 25 papers. The gaps in the third column, taken together, form the empirical basis for your research problem.

Tip 4: Write the Problem Statement for Two Audiences

A PhD problem statement must work for two audiences: specialists in the field (who need precise technical language and theoretical framing) and non-specialists such as funders and ethics boards (who need plain language and a clear statement of real-world significance). Write two versions.

Template for communicating your problem to your supervisor or thesis committee (specialist version):

Within [theoretical framework or research tradition], [specific gap: what is unknown, unresolved, or underexplored]. Existing studies have primarily [describe the limitation: used method X, studied population Y, focused on context Z], leaving [the specific unexplored aspect] unaddressed. This study aims to [objective], with the aim of contributing to [specific theoretical or empirical conversation].

Template for communicating your problem to a non-specialist audience (funder or ethics board version):

[One sentence: what is the real-world situation this study is concerned with?] Despite [what has been tried or studied], [the specific challenge or gap that remains] continues to affect [who is affected]. This study will investigate [plain-language description of the study objective], which will generate knowledge that can inform [practical application: policy, practice, program design].

Research Problem Examples Across Disciplines

The following examples illustrate how a research problem looks across different academic and professional fields.

How Does the Research Problem Relate to the Rest of the Study?

The research problem is not an isolated element. It connects to every other component of a research project. The table below shows these relationships.

Can the Research Problem Change During the Study?

Yes. Research problems can and do change during a study, particularly in qualitative and exploratory research. A researcher may discover new perspectives, unexpected data patterns, or additional constraints that require a revision of the original problem. This is not a failure; it is a sign of intellectual responsiveness.

However, significant changes to the problem should be documented and justified. In applied or funded research, changes may need to be communicated to supervisors, ethics boards, or funders. The core principle is that any revision should make the problem more precise, not more vague.

Frequently Asked Questions

Is a research problem the same as a problem statement?

No. The research problem is the underlying gap or challenge that exists in the field. The problem statement is the written paragraph in your paper or research proposal that formally articulates that problem, provides context, and explains its significance. Think of the research problem as the issue and the problem statement as the written expression of it.

How long should a problem statement be?

For most purposes, 100 to 200 words is appropriate. A PhD thesis introduction may contain a more extended discussion of 300 to 500 words that develops the context in greater depth. For a grant proposal or ethics application, follow the specified word or character limits provided by the funding body or institution.

How do I know if my research problem is “good enough”?

A research problem is strong enough to proceed with when it meets all eight characteristics listed in this article (novel, significant, feasible, clear, grounded in evidence, measurable, ethically sound, and aligned with your capability); when you can point to at least two published sources that confirm the gap; when a knowledgeable person in your field would agree that the question is worth asking; and when you can collect the data or evidence needed to address it within your available resources.

What is the difference between a research problem and a research gap?

A research gap is one type of research problem: it describes an area where knowledge is absent or insufficient. A research problem is the broader category and may also include contradictions between theories, inconsistencies between theoretical predictions and empirical findings, unsolved practical challenges, or methodological limitations in existing research. Every research gap is a type of research problem, but not every research problem is simply a gap.

Do you always need a hypothesis if you have a research problem?

No. Hypotheses are primarily used in quantitative and experimental research where the goal is to test a predicted relationship between variables. Qualitative research typically uses research questions instead of hypotheses because the aim is to explore, describe, or interpret rather than to test. Exploratory and descriptive studies may also use research questions alone. The research problem always exists; whether a hypothesis is needed depends on the research design.

My supervisor says my research problem is “too descriptive.” What does that mean?

A descriptive research problem simply catalogues or describes a situation without asking why it exists, what causes it, or what factors are associated with it. Supervisors often push for analytical or explanatory depth: not just “what is the situation?” but “what explains it?” or “what is the relationship between these variables?” To address this feedback, revisit whether your problem can be reframed from a descriptive gap (“not enough is known about how X looks”) to an analytical gap (“the mechanisms or factors that explain X are not understood”).

I am a first-year PhD student and I have changed my research problem three times already. Is that normal?

Completely normal. Research on how doctoral students form their dissertation problems shows that most successful PhD graduates revised their problems significantly during the first year. Problem formulation is genuinely difficult; it requires synthesizing a large body of literature, understanding methodological feasibility, and aligning the problem with your supervisory expertise. Three revisions in a year is a sign of intellectual engagement, not failure. The goal is not to find the perfect problem quickly but to arrive, through iterative refinement, at a problem that is clear, grounded, and achievable.

Can I use a research problem from a published paper’s “future research” section as my own?

Yes, with appropriate framing. Authors frequently identify directions for future research at the end of their papers, and these are legitimate starting points for a new study. However, you must:

1. conduct your own literature review to confirm the gap still exists and has not been addressed since publication;
2. frame the problem in your own words and context; and
3. cite the original paper as a source that identified the gap.

You are building on their suggestion, not copying their work.

Summary

This article was originally published on August 22, 2023, and updated on June 17, 2026.