### Does the sampling method fit the research design

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Sampling:

1. Is the target population carefully described?

2. Are sample selection procedures clearly defined?

3. Does the sampling method fit the research design?

4. Are potential sample biases described?

5. Is the sample sufficiently large?

6. Did the authors use power analysis to document that the study size was adequate or inadequate?

7. How was sample size justified?

8. To whom can study results be generalized?

Data Collection:

1. Describe the instruments used for data collection.

2. Has rationale been given for the selection of instruments?

3. Are instruments congruent with the research question?

4. Are instruments suitable for use with the study sample?

5. Have procedures for testing the reliability and validity of instruments been described? Are results sufficient to indicate their use?

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