Qualitative Evaluation and Research Methods: Sampling Approaches
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Questions and Answers

What is the main difference between qualitative and quantitative methods regarding sampling approaches?

  • Qualitative methods rely on random sampling, while quantitative methods focus on purposeful selection of small samples.
  • Qualitative methods focus on in-depth study of small purposefully selected samples, while quantitative methods depend on larger randomly selected samples. (correct)
  • Quantitative methods focus on in-depth study of small purposefully selected samples, while qualitative methods depend on larger randomly selected samples.
  • Both qualitative and quantitative methods depend on large randomly selected samples.

    • What is the main purpose of probability sampling in quantitative methods?

  • To select a truly random and statistically representative sample.
  • To focus on relatively small purposefully selected samples.
  • To permit generalization from the sample to a larger population. (correct)
  • To select information-rich cases for in-depth study.

    • What does the term 'information-rich cases' refer to in the context of purposeful sampling?

  • Cases that are randomly selected from the population.
  • Cases that are not statistically representative of the population.
  • Cases that provide a great deal of information about central research issues. (correct)
  • Cases that are not relevant to the purpose of the research.

    • How does purposeful sampling differ from probability sampling?

    <p>Purposeful sampling selects in formation-rich cases for study in depth, while probability sampling depends on larger samples selected randomly.</p> Signup and view all the answers

    Why do qualitative methods typically focus on relatively small samples?

    <p>Because it allows for in-depth study of information-rich cases related to the research purpose.</p> Signup and view all the answers

    What is the primary goal of probability sampling?

    <p>To permit generalization from the sample to a larger population.</p> Signup and view all the answers

    What is the purpose of purposeful sampling?

    <p>To select information-rich cases to illuminate the questions under study</p> Signup and view all the answers

    What does extreme or deviant case sampling focus on?

    <p>Cases that are rich in information because they are unusual or special in some way</p> Signup and view all the answers

    What is the logic of extreme case sampling?

    <p>To learn about unusual conditions or extreme outcomes relevant to improving typical programs</p> Signup and view all the answers

    When might extreme case sampling be particularly troublesome or especially enlightening?

    <p>When gathering standardized information from a large, statistically representative sample</p> Signup and view all the answers

    What does the text suggest about selecting information-rich cases for study?

    <p>Illuminating the questions under study</p> Signup and view all the answers

    What is the main aim of purposeful sampling?

    <p>Selecting information-rich cases to illuminate the questions under study</p> Signup and view all the answers

    What is the logic behind purposefully selecting information-rich cases?

    <p>To illuminate the questions under study</p> Signup and view all the answers

    When might an evaluator learn more by intensively studying examples of really poor programs and really excellent programs?

    <p>When one wants to precisely document the natural variation among programs</p> Signup and view all the answers

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