The Dissertation Dictionary
Research Limitations & Delimitations
What they are – and how they’re different (with examples)
The 30-second summary
Limitations and delimitations both describe the “boundaries” of your research, but they mean very different things.
- Limitations are the weaknesses of your study, often outside your control (e.g. time, funding, sample size, or design constraints).
- Delimitations are the boundaries you intentionally set, such as focusing on one age group, location, or method.
- Limitations restrict what you can conclude, while delimitations define what you chose not to cover.
By discussing these clearly, you’ll set realistic expectations for your study and strengthen your credibility as a researcher.
Navigate
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.
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 utilized 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 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.
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.