To generate samples that are representative through random selection of participants.
What is the purpose of sampling in qualitative research?
100
It is a sampling technique that targets a particular group of people.
What is purposive sampling?
100
The researcher asks previous participants if they know any other potential participants.
How is snowball sampling conducted?
100
It can lead to biases such as over-representation or under-representation of a particular group in the sample.
What is a disadvantage of convenience sampling?
200
Probability and non-probability.
What are the two main types of sampling methods?
200
When the researcher needs to obtain a sample quickly to investigate an urgent problem.
In what situation might purposive sampling be useful?
200
To locate hidden populations - for example, when people with the required characteristics are rare or hard to find - by having existing participants refer to new participants.
What is a reason for using snowball sampling?
200
A particular group of people who happen to be available.
How are participants chosen for the study?
300
The sample numbers in qualitative research are smaller.
What is the difference in sample numbers between qualitative research and quantitative research?
300
It can lead to a small degree of bias if the sampling process is not documented or explained with a clear objective criteria.
What is a disadvantage of purposive sampling?
300
It is cost-efficient.
What is one advantage of this sampling technique?
300
Random sampling is purely random within a population, whereas convenience sampling is based on the availability of the participants.
What is the difference between convenience and random sampling?
400
This is because it represents important characteristics of a population. It is these characteristics that are the main concern in evaluation of research.
Why is a sample used in qualitative research?
400
If the desired population for the study is rare or difficult to locate - for example, if the researcher wants to study elderly women who are homeless, or illegal immigrants.
When might purposive sampling become the only option?
400
Participants know the identity of other participants, resulting in confidentiality issues.
What is a major limitation of this sampling technique?
400
Random sampling.
What shouldn't convenience sampling be confused with?
500
Prescribed selection criteria.
What do all the sampling methods rely upon?
500
To explore the particular characteristics of the researcher's topic. This could refer to socio-economic characteristics (e.g. living below the poverty line).
What is the basis for using purposive sampling?
500
Homeless people and drug users.
What are examples of target populations for snowball sampling?
500
It is not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population.
Why is convenience sampling called convenience sampling?