define limitations and delimitations in research

Research Limitations & Delimitations

What they are and how they’re different (with examples)

By: Derek Jansen (MBA) | Expert Reviewed By: David Phair (PhD) | September 2022

If you’re new to the world of research, you’ve probably heard the terms “ research limitations ” and “ research delimitations ” being thrown around, often quite loosely. In this post, we’ll unpack what both of these mean, how they’re similar and how they’re different – so that you can write up these sections the right way.

Overview: Limitations vs Delimitations

First things first…

Let’s start with the most important takeaway point of this post – research limitations and research delimitations are not the same – but they are related to each other (we’ll unpack that a little later). So, if you hear someone using these two words interchangeably, be sure to share this post with them!

Research Limitations

Research limitations are, at the simplest level, the weaknesses of the study, based on factors that are often outside of your control as the researcher. These factors could include things like time , access to funding, equipment , data or participants . For example, if you weren’t able to access a random sample of participants for your study and had to adopt a convenience sampling strategy instead, that would impact the generalizability of your findings and therefore reflect a limitation of your study.

Research limitations can also emerge from the research design itself . For example, if you were undertaking a correlational study, you wouldn’t be able to infer causality (since correlation doesn’t mean certain causation). Similarly, if you utilised online surveys to collect data from your participants, you naturally wouldn’t be able to get the same degree of rich data that you would from in-person interviews .

Simply put, research limitations reflect the shortcomings of a study , based on practical (or theoretical) constraints that the researcher faced. These shortcomings limit what you can conclude from a study, but at the same time, present a foundation for future research . Importantly, all research has limitations , so there’s no need to hide anything here – as long as you discuss how the limitations might affect your findings, it’s all good.

Research limitations are the weaknesses of the study, based on factors that are often outside of your control as the researcher.

Research Delimitations

Alright, now that we’ve unpacked the limitations, let’s move on to the delimitations .

Research delimitations are similar to limitations in that they also “ limit ” the study, but their focus is entirely different. Specifically, the delimitations of a study refer to the scope of the research aims and research questions . In other words, delimitations reflect the choices you, as the researcher, intentionally make in terms of what you will and won’t try to achieve with your study. In other words, what your research aims and research questions will and won’t include.

As we’ve spoken about many times before, it’s important to have a tight, narrow focus for your research, so that you can dive deeply into your topic, apply your energy to one specific area and develop meaningful insights. If you have an overly broad scope or unfocused topic, your research will often pull in multiple, even opposing directions, and you’ll just land up with a muddy mess of findings .

So, the delimitations section is where you’ll clearly state what your research aims and research questions will focus on – and just as importantly, what they will exclude . For example, you might investigate a widespread phenomenon, but choose to focus your study on a specific age group, ethnicity or gender. Similarly, your study may focus exclusively on one country, city or even organization. As long as the scope is well justified (in other words, it represents a novel, valuable research topic), this is perfectly acceptable – in fact, it’s essential. Remember, focus is your friend.

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define limitations and delimitations in research

Conclusion: Limitations vs Delimitations

Ok, so let’s recap.

Research limitations and research delimitations are related in that they both refer to “limits” within a study. But, they are distinctly different. Limitations reflect the shortcomings of your study, based on practical or theoretical constraints that you faced.

Contrasted to that, delimitations reflect the choices that you made in terms of the focus and scope of your research aims and research questions. If you want to learn more about research aims and questions, you can check out this video post , where we unpack those concepts in detail.

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This post is part of our research writing mini-course, which covers everything you need to get started with your dissertation, thesis or research project.

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Thank you so much for this very simple but explicit explanation on limitation and delimitation. It has so helped me to develop my masters proposal. hope to recieve more from your site as time progresses

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Diving Deeper into Limitations and Delimitations

If you are working on a thesis, dissertation, or other formal research project, chances are your advisor or committee will ask you to address the delimitations of your study. When faced with this request, many students respond with a puzzled look and then go on to address what are actually the study’s limitations.

In a previous article , we covered what goes into the limitations, delimitations, and assumptions sections of your thesis or dissertation. Here, we will dive a bit deeper into the differences between limitations and delimitations and provide some helpful tips for addressing them in your research project—whether you are working on a quantitative or qualitative study.

Acknowledging Weaknesses vs. Defining Boundaries

These concepts are easy to get confused because both limitations and delimitations restrict (or limit) the questions you’ll be able to answer with your study, most notably in terms of generalizability.

However, the biggest difference between limitations and delimitations is the degree of control you have over them—that is, how much they are based in conscious, intentional choices you made in designing your study.

Limitations occur in all types of research and are, for the most part, outside the researcher’s control (given practical constraints, such as time, funding, and access to populations of interest). They are threats to the study’s internal or external validity.

Limitations may include things such as participant drop-out, a sample that isn’t entirely representative of the desired population, violations to the assumptions of parametric analysis (e.g., normality, homogeneity of variance), the limits of self-report, or the absence of reliability and validity data for some of your survey measures.

Limitations can get in the way of your being able to answer certain questions or draw certain types of inferences from your findings. Therefore, it’s important to acknowledge them upfront and make note of how they restrict the conclusions you’ll be able to draw from your study. Frequently, limitations can get in the way of our ability to generalize our findings to the larger populations or to draw causal conclusions, so be sure to consider these issues when you’re thinking about the potential limitations of your study.

Delimitations are also factors that can restrict the questions you can answer or the inferences you can draw from your findings. However, they are based on intentional choices you make a priori (i.e., as you’re designing the study) about where you’re going to draw the boundaries of your project. In other words, they define the project’s scope.

Like limitations, delimitations are a part of every research project, and this is not a bad thing. In fact, it’s very important! You can’t study everything at once. If you try to do so, your project is bound to get huge and unwieldy, and it will become a lot more difficult to interpret your results or come to meaningful conclusions with so many moving parts. You have to draw the line somewhere, and the delimitations are where you choose to draw these lines.

One of the clearest examples of a delimitation that applies to almost every research project is participant exclusion criteria. In conducting either a quantitative or a qualitative study, you will have to define your population of interest. Defining this population of interest means that you will need to articulate the boundaries of that population (i.e., who is not included). Those boundaries are delimitations.

For example, if you’re interested in understanding the experiences of elementary school teachers who have been implementing a new curriculum into their classrooms, you probably won’t be interviewing or sending a survey to any of the following people: non-teachers, high-school teachers, college professors, principals, parents of elementary school children, or the children themselves. Furthermore, you probably won’t be talking to elementary school teachers who have not yet had the experience of implementing the curriculum in question. You would probably only choose to gather data from elementary school teachers who have had this experience because that is who you’re interested in for the purposes of your study. Perhaps you’ll narrow your focus even more to elementary school teachers in a particular school district who have been teaching for a particular length of time. The possibilities can go on. These are choices you will need to make, both for practical reasons (i.e., the population you have access to) and for the questions you are trying to answer.

Of course, for this particular example, this does not mean that it wouldn’t be interesting to also know what principals think about the new curriculum. Or parents. Or elementary school children. It just means that, for the purposes of your project and your research questions, you’re interested in the experience of the teachers, so you’re excluding anyone who does not meet those criteria. Having delimitations to your population of interest also means that you won’t be able to answer any questions about the experiences of those other populations; this is ok because those populations are outside of the scope of your project . As interesting as their experiences might be, you can save these questions for another study. That is the part of the beauty of research: there will always be more studies to do, more questions to ask. You don’t have to (and can’t) do it all in one project.

Continuing with the previous example, for instance, let’s suppose that the problem you are most interested in addressing is the fact that we know relatively little about elementary school teachers’ experiences of implementing a new curriculum. Perhaps you believe that knowing more about teachers’ experiences could inform their training or help administrators know more about how to support their teachers. If the identified problem is our lack of knowledge about teachers’ experiences, and your research questions focus on better understanding these experiences, that means that you are choosing not to focus on other problems or questions, even those that may seem closely related. For instance, you are not asking how effective the new curriculum is in improving student test scores or graduation rates. You might think that would be a very interesting question, but it will have to wait for another study. In narrowing the focus of your research questions, you limit your ability to answer other questions, and again, that’s ok. These other questions may be interesting and important, but, again, they are beyond the scope of your project .

Common Examples of Limitations

While each study will have its own unique set of limitations, some limitations are more common in quantitative research, and others are more common in qualitative research.

In quantitative research, common limitations include the following:

– Participant dropout

– Small sample size, low power

– Non-representative sample

– Violations of statistical assumptions

– Non-experimental design, lack of manipulation of variables, lack of controls

– Potential confounding variables

– Measures with low (or unknown) reliability or validity

– Limits of an instrument to measure the construct of interest

– Data collection methods (e.g., self-report)

– Anything else that might limit the study’s internal or external validity

In qualitative research, common limitations include the following:

– Lack of generalizability of findings (not the goal of qualitative research, but still worth mentioning as a limitation)

– Inability to draw causal conclusions (again, not the goal of qualitative research, but still worth mentioning)

– Researcher bias/subjectivity (especially if there is only one coder)

– Limitations in participants’ ability/willingness to share or describe their experiences

– Any factors that might limit the rigor of data collection or analysis procedures

Common Examples of Delimitations

As noted above, the two most common sources of delimitations in both quantitative and qualitative research include the following:

– Inclusion/exclusion criteria (or how you define your population of interest)

– Research questions or problems you’ve chosen to examine

Several other common sources of delimitations include the following:

– Theoretical framework or perspective adopted

– Methodological framework or paradigm chosen (e.g., quantitative, qualitative, or mixed-methods)

– In quantitative research, the variables you’ve chosen to measure or manipulate (as opposed to others)

Whether you’re conducting a quantitative or qualitative study, you will (hopefully!) have chosen your research design because it is well suited to the questions you’re hoping to answer. Because these questions define the boundaries or scope of your project and thus point to its delimitations, your research design itself will also be related to these delimitations.

Questions to Ask Yourself

As you are considering the limitations and delimitations of your project, it can be helpful to ask yourself a few different questions.

Questions to help point out your study’s limitations :

1. If I had an unlimited budget, unlimited amounts of time, access to all possible populations, and the ability to manipulate as many variables as I wanted, how would I design my study differently to be better able to answer the questions I want to answer? (The ways in which your study falls short of this will point to its limitations.)

2. Are there design issues that get in the way of my being able to draw causal conclusions?

3. Are there sampling issues that get in the way of my being able to generalize my findings?

4. Are there issues related to the measures I’m using or the methods I’m using to collect data? Do I have concerns about participants telling the truth or being able to provide accurate responses to my questions?

5. Are there any other factors that might limit my study’s internal or external validity?

Questions that help point out your study’s delimitations :

1. What are my exclusion criteria? Who did I not include in my study, and why did I make this choice?

2. What questions did I choose not to address in my study? (Of course, the possibilities are endless here, but consider related questions that you chose not to address.)

3. In what ways did I narrow the scope of my study in order to hone in on a particular issue or question?

4. What other methodologies did I not use that might have allowed me to answer slightly different questions about the same topic?

How to Write About Limitations and Delimitations

Remember, having limitations and delimitations is not a bad thing. They’re present in even the most rigorous research. The important thing is to be aware of them and to acknowledge how they may impact your findings or the conclusions you can draw.

In fact, writing about them and acknowledging them gives you an opportunity to demonstrate that you can think critically about these aspects of your study and how they impact your findings, even if they were out of your control.

Keep in mind that your study’s limitations will likely point to important directions for future research. Therefore, when you’re getting ready to write about your recommendations for future research in your discussion, remember to refer back to your limitations section!

As you write about your delimitations in particular, remember that they are not weaknesses, and you don’t have to apologize for them. Good, strong research projects have clear boundaries. Also, keep in mind that you are the researcher and you can choose whatever delimitations you want for your study. You’re in control of the delimitations. You just have to be prepared—both in your discussion section and in your dissertation defense itself—to justify the choices you make and acknowledge how these choices impact your findings.

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Scope and Delimitations – Explained & Example

What Is Scope and Delimitation in Research?

The scope and delimitations of a thesis, dissertation or research paper define the topic and boundaries of the research problem to be investigated.

The scope details how in-depth your study is to explore the research question and the parameters in which it will operate in relation to the population and timeframe.

The delimitations of a study are the factors and variables not to be included in the investigation. In other words, they are the boundaries the researcher sets in terms of study duration, population size and type of participants, etc.

Difference Between Delimitations and Limitations

Delimitations refer to the boundaries of the research study, based on the researcher’s decision of what to include and what to exclude. They narrow your study to make it more manageable and relevant to what you are trying to prove.

Limitations relate to the validity and reliability of the study. They are characteristics of the research design or methodology that are out of your control but influence your research findings. Because of this, they determine the internal and external validity of your study and are considered potential weaknesses.

In other words, limitations are what the researcher cannot do (elements outside of their control) and delimitations are what the researcher will not do (elements outside of the boundaries they have set). Both are important because they help to put the research findings into context, and although they explain how the study is limited, they increase the credibility and validity of a research project.

Guidelines on How to Write a Scope

A good scope statement will answer the following six questions:

To make things as clear as possible, you should also state why specific variables were omitted from the research scope, and whether this was because it was a delimitation or a limitation. You should also explain why they could not be overcome with standard research methods backed up by scientific evidence.

How to Start Writing Your Study Scope

Use the below prompts as an effective way to start writing your scope:

Guidelines on How to Write Delimitations

Since the delimitation parameters are within the researcher’s control, readers need to know why they were set, what alternative options were available, and why these alternatives were rejected. For example, if you are collecting data that can be derived from three different but similar experiments, the reader needs to understand how and why you decided to select the one you have.

Your reasons should always be linked back to your research question, as all delimitations should result from trying to make your study more relevant to your scope. Therefore, the scope and delimitations are usually considered together when writing a paper.

How to Start Writing Your Study Delimitations

Use the below prompts as an effective way to start writing your study delimitations:

Examples of Delimitation in Research

Examples of delimitations include:

Examples of Limitations in Research

Examples of limitations include:

The term rationale of research means the reason for performing the research study in question.

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Scope and Delimitations in Research

All scientific research has boundaries, whether or not the authors clearly explain them. Your study’s scope and delimitations are the sections where you define the broader parameters and boundaries of your research. The scope details what your study will explore, such as the target population, extent, or study duration. Delimitations are factors and variables not included in the study.

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The scope details what your study will explore, such as the target population, extent, or study duration. Delimitations are factors and variables not included in the study.

Scope and delimitations are not methodological shortcomings; they’re always under your control. Discussing these is essential because doing so shows that your project is manageable and scientifically sound.

This article covers:

What is the scope in a research paper?

Simply put, the scope is the domain of your research. It describes the extent to which the research question will be explored in your study.

Articulating your study’s scope early on helps you make your research question focused and realistic. It also helps decide what data you need to collect (and, therefore, what data collection tools you need to design). Getting this right is vital for both academic articles and funding applications.

Scope example

Your research question is, “What is the impact of bullying on the mental health of adolescents?” This topic, on its own, doesn’t say much about what’s being investigated.

The scope, for example, could encompass:

What are delimitations in a research paper?

Delimitations are those factors or aspects of the research area that you’ll exclude from your research. The scope and delimitations of the study are intimately linked.

Essentially, delimitations form a more detailed and narrowed-down formulation of the scope in terms of exclusion. The delimitations explain what was (intentionally) not considered within the given piece of research.

Delimitations example

Look back at the previous example.

Exploring the adverse effects of bullying on adolescents’ mental health is a preliminary delimitation. This one was chosen from among many possible research questions (e.g., the impact of bullying on suicide rates, or children or adults).

Delimiting factors could include:

What’s the difference between limitations and delimitations?

Delimitations and limitations are entirely different, although they often get mixed up. These are the main differences:

a chart defining delimitations and limitations

Example of the differences

To clarify these differences, go back to the limitations of the earlier example.

Limitations could comprise:

Where do you write the scope and delimitations, and why?

It can be surprisingly empowering to realize you’re restricted when conducting scholarly research. But this realization also makes writing up your research easier to grasp and makes it easier to see its limits and the expectations placed on it. Properly revealing this information serves your field and the greater scientific community. Openly (but briefly) acknowledge the scope and delimitations of your study early on. The Abstract and Introduction sections are good places to set the parameters of your paper.

Next, discuss the scope and delimitations in greater detail in the Methods section. You’ll need to do this to justify your methodological approach and data collection instruments, as well as analyses

At this point, spell out why these delimitations were set. What alternative options did you consider? Why did you reject alternatives? What could your study not address?

Let’s say you’re gathering data that can be derived from different but related experiments. You must convince the reader that the one you selected best suits your research question.

Finally, a solid paper will return to the scope and delimitations in the Findings or Discussion section. Doing so helps readers contextualize and interpret findings because the study’s scope and methods influence the results.

For instance, agricultural field experiments carried out under irrigated conditions yield different results from experiments carried out without irrigation.

Being transparent about the scope and any outstanding issues increases your research’s credibility and objectivity. It helps other researchers replicate your study and advance scientific understanding of the same topic (e.g., by adopting a different approach).

How do you write the scope and delimitations?

Define the scope and delimitations of your study before collecting data. This is critical. This step should be part of your research project planning.

Answering the following questions will help you address your scope and delimitations clearly and convincingly.

Useful vocabulary for scope and delimitations

a chart defining delimitations and scope

Analysis of a published scope

In one example, Simione and Gnagnarella (2020) compared the psychological and behavioral impact of COVID-19 on Italy’s health workers and general population.

Here’s a breakdown of the study’s scope into smaller chunks and discussion of what works and why.

Also notable is that this study’s delimitations include references to:

The delimitations narrowed down the scope as follows:

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List the Possible Limitations and Delimitations Topic 3: Background and Introduction

Q: What is the meaning of scope and delimitations of a study?

Asked on 24 Oct, 2019

Scope and delimitations are two elements of a research paper or thesis. The scope of a study explains the extent to which the research area will be explored in the work and specifies the parameters within which the study will be operating. For example, let's say a researcher wants to study the impact of mobile phones on behavior patterns of elementary school children. However, it is not possible for the researcher to cover every aspect of the topic.

So the scope will have to be narrowed down to a certain section of the target population. In this case, the scope might be narrowed down to a group of 50 children in grades 3-5 of one specific school. Their behavior patterns in school may have been observed for a duration of 6 months. These would form the delimitations of the study.

Thus, delimitations are the characteristics that limit the scope and describe the boundaries of the study, such as the sample size, geographical location or setting in which the study takes place, population traits, etc. Additionally, the researcher might also choose to use some research tools and methodologies to collect data but not others. These delimitations might be imposed for practical reasons, such as lack of time or financial resources to carry out a more thorough investigation. The delimitation section of the study should explain why specific choices were made while others were excluded and how this might affect the outcome of the research.

In the example mentioned above, the researcher might state why he/she chose to study a sample population of 50 students, why he/she selected students from Grades 3-5 and not grades 1-2, and why he/she chose students of Billabong Elementary Public School over other schools.

To learn in depth how to write a persuasive Introduction for your research paper, check out this course designed exclusively for researchers: How to write a strong introduction for your research paper .

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Limitations and Delimitations: The Boundaries and Weakness of Your Research

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Every research has it strengths and weaknesses and the limitations of the study addresses these weaknesses, but so does delimitations, yet they are different from each other except on account that both of them explore and explain the factors that limit the questions your research will be able to answer and how these factors can have an impact on your research, this shows that no research is foolproof but the extent to which they affect your research can have a say on the validity of your research outcomes.

What are research limitations?

Researchers try to find the best possible data for their research to answer a specific question. But no matter how good your research is, it will only provide you with information. The question you ask, the design of your study, and many other factors can limit the amount of information you get from your research. Research limitations are limitations that come from the way you design a study, and they are often due to ethical or methodological reasons. These limitations may make it difficult to draw conclusions and may influence the results. – Sample size: The larger your sample size, the more likely it is that you will find a significant difference between the sample and the control group. – Question: Your results will vary depending on what you ask. – Research design: The validity of your study may be limited by the design of your research. – Data analysis: The way you analyze your data is just as important as the data themselves.

What are research delimitations?

Unlike limitations, research delimitations refer to factors that are not essentially outside of the researcher’s control because delimitations are in essence the limitations consciously set by the authors themselves. They are concerned with the definitions that the researchers decide to set as the boundaries or limits of their work so that the study’s aims and objectives do not become impossible to achieve. Unlike limitations, however, a research delimitation does not mean that the study does not provide some useful information or has been unable to explore something. It simply means that it may not answer all of the study’s research questions. For example, a study may look at the effectiveness of a new treatment, but due to size limitations, it could not determine if the treatment helped patients with all types of cancer or only those with a certain type of cancer. In this case, the study is a delimitation, meaning the researchers did not answer all of the questions about the effectiveness of the treatment.

Importance of Research Limitations and Research Delimitations

The limitations of a study are important because they can help you understand why certain results happened. For example, if you used only one sample size to test your hypothesis, you would expect to find a significant difference between the sample and the control group. If you did not find this difference, there may be something wrong with your sample size. Limitations also help you learn from your mistakes. If you make a mistake, you can use limitations to correct for that mistake and improve the quality of your research.

In a study that addresses all of the research questions, the results can be very definitive. But in a study that only answers part of the questions, the results may be more like a hypothesis. In a study that only addresses some of its research aims and questions, the results can be even more like a hypothesis. Regardless of the level of the study, the researcher is building an idea of what may be. As researchers build these ideas, they may encounter delimitations, limitations, and other factors that can limit the information they receive. With all of these factors in mind, researchers can still make valuable conclusions from their research.

Wrapping Up

Researchers should also note that limitations and delimitations are different from another similar restraint on the infallibility of any research – the ‘assumptions’ part. Nonetheless, researchers have an obligation to the academic community to present complete and honest limitations of a presented study and even if they have influenced the outcomes and conclusions you have derived from your research, by describing them in detail and critically evaluating your own study design – you have made a case for your research credibility.

Theofanidis, Dimitrios, & Fountouki, Antigoni. (2019). Limitations And Delimitations In The Research Process. Perioperative nursing (GORNA), E-ISSN:2241-3634, 7(3), 155–162. http://doi.org/10.5281/zenodo.2552022

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Research terms video2
conclusive research & types
Limitations are Empowering: the allegory of Michaelangelo’s David
Limitation vs. Delimitation in Research [Urdu/Hindi]
Research Procedures Finding Sources & Evaluating Credibility

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What Is the Difference Between Limitation and Delimitation?
According to Baltimore Public County Schools, limitations include factors the experimenter cannot control, while delimitations are boundaries the experimenter intentionally sets. Both affect methodology and research data.
What Is Delimitation in Research? Examples of Scope & Delimitation
When you’re planning the launch of a study or report, you’ll need to make some important decisions to limit the people you’re researching and the ways you’ll conduct your study. Delimitation is the process of drawing boundaries for or fixin...
Defining the Scope and Limitations in a Thesis
When writing a thesis, there are many essential elements to develop in order to give the reader a clear understanding of the research. Two of these components are the scope and the limitations.
Research Limitations vs Research Delimitations
Research limitations and research delimitations are related in that they both refer to “limits” within a study. But, they are distinctly different. Limitations
Diving Deeper into Limitations and Delimitations
However, the biggest difference between limitations and delimitations is the degree of control you have over them—that is, how much they are based in conscious
Scope and Delimitations
Difference Between Delimitations and Limitations ... Delimitations refer to the boundaries of the research study, based on the researcher's
Scope and Delimitations in Research
Your study's scope and delimitations are the sections where you define the broader parameters and boundaries of your research. The scope details what your study
LIMITATIONS AND DELIMITATIONS IN THE RESEARCH PROCESS
Aim: to define, review and elaborate how limitations and delimitations are currently acknowledged in the nursing and biomedical literature and their
List the Possible Limitations and Delimitations
The Possible Limitations and Delimitations illustrate the various considerations or “qualifiers” that characterize your ability to carry out your particular
Limitations, delimitations and assumptions in research [Differences
This video explains what are limitations, delimitations and assumptions in research. What are the differences among all these concepts.
(PDF) ARTICLE: "Research Methods and Strategies: Let's Stop the
References (21) ·... Limitations reflect the constraints to the study in both the research methodology and design. ·... Delimitations can be defined as the
What is the meaning of scope and delimitations of a study?
Thus, delimitations are the characteristics that limit the scope and describe the boundaries of the study, such as the sample size, geographical
Limitations and Delimitations: The Boundaries and Weakness of
Unlike limitations, research delimitations refer to factors that are not essentially outside of the researcher's control because delimitations
Sample Chapter 1 and 3 Outlines
The delimitations and limitations sections of your research proposal describe situations and circumstances that may affect or restrict your methods and analysis