Clarifying Research Designs: Quantitative and Qualitative


. Apply the critique guidelines regarding the adequacy of the sample in quantitative studies to the study:
Pellegrini, J., DeLoge, J., Bennett, J., & Kelly, J. (2009). Comparison of inhalation isopropyl alcohol vs promethazine in the treatment of postoperative nausea and vomiting (PONV) in patients identified as at high risk for developing PONV. AANA Journal, 77(4), 293-299.
1. Are the sampling inclusion criteria, sampling exclusion criteria, or both clearly identified and appropriate for the study?
2. Is the sample size identified? If groups were included in the study, is the sample size for each group discussed?
3. Is a power analysis reported? Was the sample size appropriate based on the power analysis?
4. Is the refusal rate and sample mortality addressed? If the refusal rate or mortality is high, does the researcher provide rationales for these?
5. Are the characteristics of the sample detailed? If two or more groups are used in the study, do the groups have comparable characteristics?
6. Is the sampling method probability or nonprobability? Identify the specific sampling method used in the study to obtain the sample. Is the sampling method adequate to achieve a representative sample?
7. Is the sample representative of the accessible and target populations?
8. What was the possibility of Type II error?
9. Are the potential biases in the sample discussed?
10. Does the researcher this week’s objective(s) define the target population to which the findings are generalized

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