Purposive Sampling: Know the Benefits, Problems and Examples

This blog helps you understand the benefits of purposive sampling and it’s types with the help of examples.

27 Sep 2023 876 14 minutes

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One method that is nothing less than a friend to researchers is sampling. Purposive sampling is always a priority for academic working on their studies worldwide. You can learn everything you need about this technique in this blog. How to make it function, how to decide to finish the paper most effectively.

Also, you'll learn what purposive sampling is and why it benefits greatly to researchers. How both quantitative and qualitative research can benefit from this method.

The simple goal of the purposive sampling method is to determine results by giving a lot of samples to a specific target audience and observing their responses and results. Many find the idea incredibly exciting since it allows researchers to streamline their work by lowering the likelihood factor in their reports.

If you are working using purposive sampling, don't panic; Global Assignment Help Australia's professionals are here to help. First, visit our site to learn more about the procedure; you can get a good paper from our professional writers. Then, contact the customer team to fix all your issues immediately.

Given your possibilities, let's start by grasping the idea of what is purposive sampling and the techniques that can be very useful to you. Then, in the next section, you can thoroughly summarise the topic.

What Is Purposive Sampling?

It is a non-probability sample intended to comprehend the population's logical process or way of thinking. It is also called a judgemental or an expert sample. This method involves choosing a group of nearby residents and then researching based on their observations. Everything depends on logic, so the probability is nil, and the sample size is taken from the entire population.

Currently, "what is purposive sampling?" refers to studies conducted with a specific goal. As a result, the researcher is free to select the sample population for the study. The likelihood of being chosen in purposive sampling is not 0 per cent. It implies that everyone involved in the study is ready to act rather than merely starting anything randomly in the purposive sampling method. That sounds easy to understand if you are unfamiliar with the method, but experts say it is a very simple concept. Let’s know why in the coming section.

What Are the Types of Purposive Sampling with Examples?

The students use 6 main purposive sampling techniques to complete their papers and research. All these purposive sampling methods are taken in different scenarios. Let's understand them:

1. Variation Sampling

Maximum variation sampling is heterogeneous sampling. It is used to collect as many different viewpoints as is practical.

Researchers include both cases, organisations, or typical or average events. Researchers can find significant common patterns that hold variants by looking at a subject from various perspectives.


This example of purposive sampling is practical when you have to carry out a comparison. For example, consider that you are looking into state-run mental health services programmes' difficulties. You choose programmes from urban and rural communities in various state regions. Then you use

maximum variation sampling to capture the most significant geographic variance. By doing this, you can record particular or exciting variations that have arisen in various places. 

2.  Homogeneous Sampling

Contrary to maximum variation sampling, homogeneous sampling minimises variance, streamlining the analysis and thoroughly describing a single subgroup.

Units in homogeneous purposive sampling in qualitative research have comparable attributes or distinctive qualities in common. These can be life experiences, occupations, or cultural backgrounds. The goal is to concentrate on this specific resemblance and consider how it pertains to the subject of your research. Mainly focus group members appear as a result via homogeneous sampling.


As part of your ongoing investigation into mental health care policies in your state, you are eager to use group interviews to shed light on how various racial groups have experienced these policies.

You choose Latinx directors of mental health care providers using a homogeneous purposive sampling method and interview them about the difficulties in putting evidence-based treatments for mental health issues into practice.

3. Deviant Sampling

The purpose of deviant case sampling is to highlight outliner or exceptional cases. These can include remarkable accomplishments or failures, scenarios, or any other manifestation of an intriguing phenomenon.

Researchers frequently use this example of purposive sampling strategy when creating best practice guidelines or investigating "what not to do."


You are examining heart surgery individuals who healed noticeably more quickly or more slowly than the norm. Given the rarity of these situations, you're seeking a variance to shed light on why the recoveries in these cases were out of the ordinary. 

4. Critical Sampling

When one or a minimal number of cases are helpful to explain other cases, the critical purposive sampling method is helpful. Scholars use the axiom "If it happens here, it will happen anywhere" to decide whether a case is critical or not. A case is essential, in other words, if what is true in one case is likely to be true in all subsequent cases.

You cannot draw statistical conclusions with critical case sampling, but you can use your results to compare comparable example of purposive sampling. Researchers employ critical case sampling in the early stages to determine whether a more in-depth study is necessary.


Although you are looking into how to incorporate local communities in local government decision-making, you are still determining if they will comprehend the rules.

If you initially question representatives of the local government, and if they cannot explain them, then most likely, no one else will either. Alternatively, you can assume that most people will understand them if you ask a few random people. This example of purposive sampling is well in the form of credibility.

5. Typical Sampling

When you wish to highlight what is considered a regular occurrence for individuals unfamiliar with a phenomenon, you employ typical case sampling. Participants are typically picked based on their propensity to behave similarly to everyone with similar traits or experiences.

Remember that typical purposive sampling's objective is to demonstrate a phenomenon, not the experiences of all participants. Because of this, typical sampling enables sample comparison rather than sample generalisation to populations.


You are looking into how ninth-graders responded to a programme that placed them in jobs. You choose participants from five cities with similar socioeconomic backgrounds to create a typical purposive sampling format.

You compile the kids' experiences through questionnaires or interviews to build a profile of an "average" ninth-grader participating in a job placement programme. Employers looking to provide future job placements for students may find this a beneficial source of information.

6. Expert Sampling

Expert purposive sampling is good when your research needs people with an extensive understanding of a topic. As a result, your specialists are chosen based on their level of expertise or skill set that is easily defined.

This kind of sampling is helpful when there is a need for more observational evidence, when looking into new research fields, or when performing exploratory research.


You are looking into the obstacles consumers in the US face while trying to eat less meat. You decide to reach out to several specialists and conduct interviews with them. Food scientists are subject matter experts who, in the context of your study, can offer helpful insights into the cause of the issue.

All these types and examples must have left in the desire to conduct this purposive sampling in qualitative research. But, before that, you must know about the primary positive and negative features of purposive sampling. 

You can also check about narrative conventions

What Are the Benefits & Drawbacks of Purposive Sampling?

Like other types of sampling, purposive sampling also has many advantages and disadvantages. Here we have collected some of the essential benefits and drawbacks of purposive sampling:

3 Benefits of Purposive Sampling

  • It helps the researcher to draw as much data as possible from the gathered information. It reduces the possibility of missing out on any information for the purpose.
  • Researchers use many sampling methods to collect data, but purposive sampling is the most popular. It is because it is very cost effective and saves time.
  • Along with being a well-planned data collection method, it enables alteration if needed. For example, a researcher can add or remove any step of purposive sampling without affecting the process.

3 Drawbacks of Purposive Sampling

  • Purposive sampling promotes biases. It is because it allows the researcher to make any changes that turn out to be harmful in some situations. 
  • Researchers' bias can be a threat to the study and its credibility. Purposive sampling makes the audience believe that the work can change according to the needs and flavour of the researchers.
  • Sometimes it takes work for researchers to explain to the participants the importance of the study. It is one of the primary reasons why researchers use another sampling method.

Now, you have an excellent idea of what is purposive sampling. After analysing both advantages and disadvantages, you might have understood how it works. The amount of risk involved is equal to the process's ease. If you feel it's too risky to use your time for this field job, try connecting with our assignment help experts. They are experienced in conducting research without flaws and can get perfect data. Check out the next section to know more!

You may also like to read:  PETAL Paragraph

Stuck at Conducting Purposive Sampling? Experts Can Help

The sampling method is challenging. The process of data collection is long and tiring. You are bound to make mistakes with these steps and different formats to maintain. You don't have to struggle with purposive sampling in qualitative research or quantitative research. However, there is a ray of hope to benefit you at Global Assignment Help Australia.

Our team of experts is here to help you conduct better sampling with unique features. Be it any deadline, topic or theme, or subject, our team of writers and researchers are there to assist. We also have several features to provide a smooth experience when ordering. These are:

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And much more. Get your purposive sampling document prepared by our expert right away. They are ready to assist you at any time of the day, even with time constrain. It is why you are guaranteed to shine at the top rank of the class with you purposive sampling.

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