Key Takeaways
- The scope of a study defines what your research covers—the boundaries within which you will operate.
- Delimitations are the choices you make that set those boundaries—they explain what you intentionally included or excluded.
- Clearly stated scope and delimitations prevent misunderstandings about your study's focus and limitations.
- They appear in Chapter One of a US dissertation, typically after the significance section and before the definition of terms.
- Well-written delimitations demonstrate that you understand your study's boundaries and have made thoughtful, strategic choices.
What Are Scope and Delimitations?
Scope refers to the boundaries of your research. It defines the parameters within which your study operates. Think of it as the answer to the question: "What exactly does this study cover?"
Delimitations are the choices you make that establish those boundaries. They are the limits you deliberately set to make your study feasible, focused, and manageable. They answer: "What did I choose to include or exclude, and why?"
Together, scope and delimitations tell readers exactly what your study is about—and just as importantly, what it is not about.
Where Do Scope and Delimitations Appear in a Thesis or Dissertation?
In most US universities, the scope and delimitations appear in:
- Chapter One (Introduction)
- After the significance of the study
- Before the definition of terms
- Sometimes as a combined section, sometimes as separate subsections
Institutions such as Purdue University and University of Michigan emphasize that this section must be clear and specific. Vague boundaries create confusion about what your study actually accomplishes.
Why Scope and Delimitations Matter
A well-written scope and delimitations section:
- Prevents Misunderstandings: Readers know exactly what your study covers, so they do not expect something you never intended to deliver.
- Demonstrates Thoughtful Planning: It shows you have made strategic decisions about focus, not just randomly chosen a topic.
- Makes Research Feasible: By setting boundaries, you ensure your study is doable within time, budget, and resource constraints.
- Protects Against Unfair Criticism: When you clearly state your boundaries, reviewers cannot criticize you for not doing something outside those boundaries.
- Guides Future Research: Other researchers can build on your work by extending beyond your delimitations.
Without clear boundaries, your study risks being seen as unfocused or incomplete.
Key Components of Scope and Delimitations
A thorough scope and delimitations section typically addresses:
| Component | What It Defines | Example Questions |
|---|---|---|
| Population | Who is being studied | What age group? What geographic region? What characteristics? |
| Geographic Scope | Where the study takes place | Single city? Multiple states? Nationwide? |
| Time Frame | When the study occurs or what time period is examined | Cross-sectional (one point)? Longitudinal (over time)? Historical period? |
| Variables/Concepts | What is being measured or explored | Which specific variables? Which constructs? |
| Theoretical Framework | What lens is being used | Which theories guide the study? Which are excluded? |
| Methodological Choices | How data is collected and analyzed | Why this method over others? What instruments? |
| Context/Settings | What environments are included | Schools? Hospitals? Corporations? Online settings? |
Scope vs Delimitations: Understanding the Difference
| Aspect | Scope | Delimitations |
|---|---|---|
| Definition | The boundaries of your study | The choices that set those boundaries |
| Focus | What is included | Why certain things were included or excluded |
| Questions Answered | What does this study cover? | Why did I make these choices? |
| Tone | Descriptive | Justificatory |
| Example | This study includes community college students in Texas | They represent an understudied population in higher education research |
Think of it this way: The scope is the fence. The delimitations are the reasons you built the fence where you did.
How to Write Scope and Delimitations (Step-by-Step Guide)
Step 1: Review Your Research Questions
Your research questions are the foundation. Everything in your scope should directly relate to answering these questions.
Example Research Question: How does participation in dual-credit programs affect first-year college GPA among first-generation students in Arkansas?
Step 2: Identify What Must Be Included to Answer Your Questions
List every element required to answer your question:
- Population: First-generation college students
- Geographic scope: Arkansas
- Program type: Dual-credit programs
- Outcome: First-year college GPA
- Time frame: Students who entered college in 2022-2023
Step 3: Set Clear Boundaries for Each Element
For each element, define the boundaries precisely.
| Element | Boundary (Scope) |
|---|---|
| Population | First-generation students (neither parent has a bachelor's degree) |
| Geographic scope | Public high schools and public universities in Arkansas |
| Program type | Dual-credit courses taken through Arkansas' concurrent enrollment programs |
| Outcome | Cumulative GPA after first year (fall and spring semesters) |
| Time frame | Students who graduated high school in 2022 and enrolled in college fall 2022 |
Step 4: Explain Your Delimitations (Why These Choices?)
For each boundary, explain your reasoning. This shows thoughtful decision-making.
| Delimitation | Justification |
|---|---|
| First-generation students only | Literature shows this population faces unique barriers; they are a priority for state education policy |
| Arkansas only | State has a unified dual-credit policy, allowing comparison across districts; also practical access to data |
| Public institutions only | Private schools have different funding and admission patterns that would confound comparison |
| 2022 cohort only | Recent enough to be relevant; allows for complete first-year data at time of study |
| GPA as outcome | Widely accepted measure of academic success; readily available from university records |
Step 5: State What Is Excluded (Deliberately)
Be explicit about what you are not covering. This prevents unfair criticism.
Example: This study does not include:
- Students who took AP or IB courses instead of dual credit
- Private high schools or private universities
- Out-of-state college enrollment
- Transfer students who did not start at an Arkansas public university
- Outcomes beyond the first year (e.g., graduation rates)
Step 6: Connect to Feasibility
Briefly note how these delimitations make your study achievable.
"These delimitations keep the study focused and feasible within the time frame of a doctoral dissertation. Limiting to one state allows for in-depth analysis of state-specific policies, while focusing on one cohort ensures data availability within the research timeline."
Step 7: Acknowledge Trade-Offs
Show that you understand that delimitations have consequences.
"While limiting the study to Arkansas limits generalizability to other states, it allows for deeper understanding of how state policy shapes dual-credit outcomes. Future research can extend this work to other contexts."
Examples of Scope and Delimitations
Example 1: Education (US Context)
Topic: The effect of restorative justice practices on school discipline disparities in urban middle schools.
Scope:
This study examines the implementation of restorative justice practices in three urban middle schools in Chicago, Illinois. The population includes approximately 1,500 students in grades 6-8, with a focus on disciplinary referral data for Black and Latino male students, who represent the highest discipline disparity groups in the district. Data will be collected for the 2022-2023 and 2023-2024 academic years, covering two years before restorative justice implementation and one year after.
Delimitations:
- Geographic delimitation: Chicago was selected because the district has formally adopted restorative justice policies and has available data. Findings may not generalize to suburban or rural districts with different demographics and resources.
- Population delimitation: The study focuses specifically on Black and Latino male students because district data show these groups experience the highest suspension rates. Other student groups (White, Asian, female students) are excluded to maintain focus on the most affected populations.
- School level delimitation: Middle schools were chosen because discipline disparities often emerge sharply during these grades. Elementary and high schools are excluded to control for developmental differences in student behavior and disciplinary responses.
- Time frame delimitation: The three-year window was selected based on data availability and the timing of policy implementation. Longer-term effects beyond one year post-implementation are not examined.
- Outcome delimitation: Disciplinary referrals and out-of-school suspensions are the primary outcomes. Other outcomes (academic achievement, school climate perceptions) are excluded to maintain focus on discipline disparities specifically.
Why These Delimitations Make Sense: These delimitations create a focused, feasible study. By concentrating on one city, one school level, and one population subgroup, the researcher can conduct deeper analysis of implementation and outcomes. The findings will directly inform Chicago Public Schools' policy decisions while providing insights that other urban districts may find relevant.
Example 2: Public Health (US Context)
Topic: Barriers to COVID-19 vaccination among rural elderly populations in Appalachia.
Scope:
This qualitative study explores barriers to COVID-19 vaccination among adults aged 65 and older residing in five rural counties in eastern Kentucky. Data will be collected through semi-structured interviews with 25-30 participants conducted between January and March 2024. The study examines individual, community, and healthcare system barriers as perceived by participants themselves.
Delimitations:
- Geographic delimitation: Five counties in eastern Kentucky were selected because the region has among the lowest vaccination rates in the state and faces significant healthcare access challenges. Findings may not apply to urban elderly populations or rural areas in other regions with different healthcare infrastructure.
- Population delimitation: Only adults 65 and older are included because this group faced the highest COVID-19 mortality risk and was prioritized for early vaccination. Younger adults and caregivers are excluded, though their perspectives may differ.
- Methodological delimitation: Semi-structured interviews were chosen to capture rich, detailed narratives. Surveys would have reached more participants but would not provide the depth needed to understand complex barriers.
- Time frame delimitation: Interviews occur in early 2024, reflecting on vaccination decisions made over the previous three years. Recall bias is acknowledged as a limitation.
- Topic delimitation: The study focuses on barriers only, not facilitators or successful outreach strategies. This narrow focus allows for deep exploration of obstacles, which can later inform intervention design.
Why These Delimitations Make Sense: Rural elderly populations are understudied in vaccine research, which typically focuses on urban areas. By deeply exploring barriers in one high-need region, this study provides rich data that local health departments can use to design targeted outreach. The narrow focus on barriers keeps the project manageable within a dissertation timeline while producing actionable findings.
Example 3: Business (US Context)
Topic: The impact of remote work on employee burnout in the US technology sector.
Scope:
This quantitative study examines the relationship between remote work intensity (days per week working remotely) and employee burnout among software engineers and IT professionals in US-based technology companies with over 500 employees. Data will be collected through an online survey distributed via professional networks and LinkedIn, targeting approximately 300 respondents. The survey includes the Maslach Burnout Inventory and questions about work arrangements, job demands, and organizational support.
Delimitations:
- Industry delimitation: The technology sector was selected because it has the highest rates of remote work adoption and faces significant talent retention challenges. Findings may not generalize to sectors where remote work is less common (healthcare, retail, manufacturing).
- Occupation delimitation: Only software engineers and IT professionals are included to control for occupational differences in job demands. Other tech roles (sales, marketing, HR) are excluded.
- Company size delimitation: Companies with 500+ employees were chosen because they typically have formal remote work policies and HR infrastructure. Small startups and freelance workers are excluded.
- Geographic delimitation: While the study includes companies across the US, it does not examine regional differences. State-level variations in labor laws and cost of living are not analyzed.
- Methodological delimitation: A quantitative survey was chosen to measure burnout at scale and identify statistical relationships. Qualitative interviews would provide depth but were excluded due to time constraints.
- Time frame delimitation: The study captures burnout at a single point in time (cross-sectional). It does not track changes over time or establish causality.
Why These Delimitations Make Sense: By focusing on one industry and occupation, this study controls for many confounding variables that would complicate interpretation. The focus on larger companies ensures that participants are working under formal policies rather than informal arrangements. While the findings may not apply to all workers, they provide valuable insights for technology companies struggling with employee retention and well-being.
Scope and Delimitations vs Limitations
| Aspect | Delimitations | Limitations |
|---|---|---|
| Definition | Boundaries you intentionally set | Weaknesses or constraints beyond your control |
| Who Sets Them | You, the researcher | The research situation, methodology, circumstances |
| Control | You choose them deliberately | You cannot eliminate them; you must acknowledge them |
| Purpose | To focus and narrow the study | To be transparent about potential weaknesses |
| Examples | Choosing only one state; excluding certain populations; using a specific theoretical framework | Small sample size; self-report bias; limited generalizability; time constraints |
| Position | Chapter One (Introduction) | Chapter Five (Discussion) or Chapter One (briefly) |
| Tone | Justificatory ("I chose this because...") | Acknowledging ("This study is limited by...") |
Example to Clarify:
Delimitation: "This study only includes community college students in Texas because the researcher had access to data from the Texas Higher Education Coordinating Board."
Limitation: "Because the study uses existing data, the researcher could not control how variables were originally measured, which may affect construct validity."
The delimitation is a choice. The limitation is an inherent constraint.
Common Mistakes to Avoid
- Being Too Vague: "This study focuses on college students." Which college students? Where? What kind? Better: "This study focuses on first-generation college students enrolled in public four-year universities in Georgia."
- Forgetting to Justify Choices: "This study only includes women." Why only women? Better: "This study only includes women because the phenomenon under investigation—work-life balance during maternity leave—is uniquely experienced by this population."
- Confusing Delimitations with Limitations: Listing "small sample size" as a delimitation. Small sample size is a limitation, not a delimitation. Delimitations are choices you make; limitations are constraints you inherit or encounter.
- Setting Boundaries That Are Too Narrow: A study so narrowly defined that findings have no relevance to anyone. Broaden just enough to allow for meaningful contribution while maintaining focus.
- Setting Boundaries That Are Too Broad: A study that tries to cover everything and ends up covering nothing well. Narrow to something manageable.
- Ignoring the "Why": Listing boundaries without explanation. "This study uses surveys only." (Why not interviews? Why not experiments?) Always explain your reasoning.
- Making It Sound Apologetic: "Unfortunately, this study only covers..." Better: "This study deliberately focuses on... to ensure depth of analysis." Frame your delimitations as strategic choices, not failures.
- Including Everything You Could Possibly Study: A scope section that reads like a wish list. Be ruthless. If it is not essential to answering your research question, exclude it and explain why.
Quick Checklist Before Submission
Before finalizing your scope and delimitations section, ask:
- Does my scope clearly define who, what, where, and when?
- Have I explained the reasoning behind each major delimitation?
- Would a reader understand exactly what my study does and does not cover?
- Have I distinguished between delimitations (my choices) and limitations (inherent constraints)?
- Are my boundaries specific enough to prevent misunderstandings?
- Have I avoided apologizing for my choices while justifying them?
- Does the scope align with my research questions and methodology?
- Have I acknowledged trade-offs (what is lost by these choices)?
- Is the section written clearly enough for someone outside my field to understand?
If the answer to all is yes, your scope and delimitations are well-defined.
Frequently Asked Questions (FAQ)
1. How long should the scope and delimitations section be?
In a US dissertation, this section is typically 1-2 pages. It should be comprehensive enough to cover all key boundaries but concise enough to maintain reader focus. Some disciplines prefer bullet points or tables for clarity; others use narrative paragraphs. Check examples in your department.
2. Can I have delimitations that are not methodological?
Yes, absolutely. Delimitations can be about population, geography, time, theory, context, or any other aspect of your study. Common non-methodological delimitations include: focusing on a specific demographic group, limiting to one geographic region, using a particular theoretical framework, or examining a specific time period.
3. What if my committee asks me to expand my scope after my proposal?
This happens. If your committee believes your scope is too narrow, they may ask you to broaden it. Be prepared to discuss trade-offs. If you add more populations or sites, explain how you will maintain feasibility.
4. How do I decide what to include and exclude?
Start with your research questions. List everything required to answer them. That is your core scope. Then, for everything else, ask: Is this essential? Would including it add meaningful value? Can I realistically do this within my constraints? If the answer to any of these is no, exclude it and explain why.
5. Can I change my delimitations after starting data collection?
Generally, no. Delimitations should be set before data collection begins. Changing them mid-study can compromise the integrity of your research. If you discover that your delimitations are problematic, discuss with your committee before making changes.
6. Do I need IRB approval for my delimitations?
Your delimitations themselves do not require IRB approval, but they affect your IRB application. If you delimit your population to vulnerable groups (children, prisoners, pregnant women), your IRB review may be more stringent.
7. How do I write delimitations for a qualitative vs quantitative study?
The structure is the same, but the content reflects your methodology. Quantitative delimitations often focus on variable selection, measurement instruments, sampling frames, and statistical controls. Qualitative delimitations often focus on participant selection, site selection, time in the field, and theoretical frameworks. Both require justification and clear boundaries.
8. What's the difference between delimitations and assumptions?
Delimitations are boundaries you set. Assumptions are things you take for granted but cannot prove. For example:
- Delimitation: "This study only includes full-time employees because the research question focuses on workplace policies that apply to this group."
- Assumption: "Participants will answer survey questions honestly."
Assumptions appear in a separate section, often after delimitations or in the methodology chapter.
9. Can my study have no delimitations?
No. Every study has boundaries. Even a massive, multi-year, federally funded study has delimitations. Acknowledging your delimitations is a sign of scholarly maturity, not weakness.
10. How do I handle delimitations when my study uses existing data?
Your delimitations include the boundaries of the original dataset. You also set delimitations in how you subset that data.
11. Should I include delimitations in my abstract?
Not usually. The abstract is a brief summary. Save detailed delimitations for Chapter One. However, you might briefly note the population and setting in the abstract, which is essentially stating your scope.
12. How do I write delimitations for a case study?
Case study delimitations are crucial because they define the case. Be specific about what constitutes the case, why it was chosen, boundaries of the case, and what is outside the case.
13. Can delimitations affect my study's generalizability?
Yes, directly. Delimitations define the population and context to which your findings might reasonably generalize. This is not a weakness—it is honest scholarship.
14. How do I respond to criticism that my delimitations are too narrow?
Be prepared to defend your choices. Explain why narrow focus allows for deeper, more rigorous analysis, how your study contributes despite (or because of) its narrow focus, and that future research can build on your work by extending boundaries.
15. What if my delimitations exclude an important population or variable?
If you realize that your delimitations exclude something genuinely important to your research question, revisit your delimitations with your committee. However, recognize that "important" does not mean "must be included in this study." Every study leaves something for future researchers.
16. How do I write delimitations when my study has multiple phases?
Address delimitations for each phase separately, then summarize. For example, in a mixed-methods study, describe Phase 1 (quantitative) and Phase 2 (qualitative) delimitations separately, then provide an overall summary.
17. Should I use subheadings in my scope and delimitations section?
Yes, often helpful. Subheadings like "Population Scope," "Geographic Scope," "Theoretical Delimitations," and "Methodological Delimitations" can make your section clearer and easier to follow.
18. Can I include a table in my scope and delimitations section?
Yes, tables can be very effective. A table summarizing key delimitations and justifications can help readers quickly grasp your boundaries.
19. How do delimitations relate to the "so what" question?
Delimitations help you answer "so what?" by showing that your study is focused enough to produce meaningful, credible findings. A study that tries to cover everything often produces nothing useful. By setting clear boundaries, you demonstrate that you understand what is necessary to answer your research question rigorously.
20. Do I need to cite sources in my delimitations section?
Sometimes. If your delimitations are based on previous research, cite that source. If your delimitations are practical, you do not need a citation—just explain the practical constraint.
Summary
The scope and delimitations section defines the boundaries of your research. It tells readers exactly what your study covers, what it does not cover, and why you made those choices.
A strong scope and delimitations section:
- Clearly defines the population, geography, time frame, and variables included
- Explains the reasoning behind each delimitation
- Distinguishes between delimitations (your choices) and limitations (inherent constraints)
- Aligns with your research questions and methodology
- Uses specific, precise language
- Demonstrates thoughtful, strategic decision-making
- Acknowledges trade-offs without apologizing
When written effectively, this section protects your study from unfair criticism, demonstrates your scholarly maturity, and gives readers confidence that you have designed a focused, feasible, and rigorous research project.