14 Questions
What is the main difference between qualitative and quantitative methods regarding sampling approaches?
Qualitative methods focus on in-depth study of small purposefully selected samples, while quantitative methods depend on larger randomly selected samples.
What is the main purpose of probability sampling in quantitative methods?
To permit generalization from the sample to a larger population.
What does the term 'information-rich cases' refer to in the context of purposeful sampling?
Cases that provide a great deal of information about central research issues.
How does purposeful sampling differ from probability sampling?
Purposeful sampling selects in formation-rich cases for study in depth, while probability sampling depends on larger samples selected randomly.
Why do qualitative methods typically focus on relatively small samples?
Because it allows for in-depth study of information-rich cases related to the research purpose.
What is the primary goal of probability sampling?
To permit generalization from the sample to a larger population.
What is the purpose of purposeful sampling?
To select information-rich cases to illuminate the questions under study
What does extreme or deviant case sampling focus on?
Cases that are rich in information because they are unusual or special in some way
What is the logic of extreme case sampling?
To learn about unusual conditions or extreme outcomes relevant to improving typical programs
When might extreme case sampling be particularly troublesome or especially enlightening?
When gathering standardized information from a large, statistically representative sample
What does the text suggest about selecting information-rich cases for study?
Illuminating the questions under study
What is the main aim of purposeful sampling?
Selecting information-rich cases to illuminate the questions under study
What is the logic behind purposefully selecting information-rich cases?
To illuminate the questions under study
When might an evaluator learn more by intensively studying examples of really poor programs and really excellent programs?
When one wants to precisely document the natural variation among programs
Test your knowledge on the differences between quantitative and qualitative sampling approaches, particularly purposeful sampling in qualitative inquiry. Understand the logics that undergird sampling approaches in qualitative and quantitative methods.
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