Sampling Flashcards
What is the goal of sampling in quantitative research?
Make statements about a larger population
What is the goal of sampling in qualitative research?
Make statements about a certain phenomenon
What characterises sampling in quantitative research?
- Sample needs to be representative of the target population
- Many cases
- Broad view
- Structured sampling
What characterises sampling in qualitative research?
- Sample needs to be appropriate to gain insight into that phenomenon
- Fewer cases than for quantitative
- In-depth view
- Less structured than for quantitative
Which sampling methods are mainly used in quantitative research?
- Probability/random sampling
- Purposive sampling if no other choice
Which sampling method is mainly used in qualitative research?
Purposive sampling
- convenience sampling
- snowball sampling
- theoretical sampling
What characterises purposive sampling?
- Selection of research objects (units of analysis) because of their relevance to the research question
- Representation is not the most important element
-> rather if/how something occurs among subjects
What defines the sample size?
- The bigger the sample, the more accurate your generalisations of the population
- More variation reduces accuracy of conclusions
- Depends on time and costs
In quantitative research, who should you include in your sample?
- Everyone you want to make statements about
- Everyone you have access to (in your database)
- Everyone you select
- Everyone that gives (valid) answers to you measure
In quantitative research, how do biases and errors occur?
- Choice of population
- Limited access to population
- Selection and random errors in representation
- Framing of the research
- Non-responses
What makes a good sample?
Representative of the population
- comes close to the characteristics of the population