Research Critique: Validity, Reliability and Sampling
- What makes a research study valid and reliable?
- What issues related to sampling (e.g., size and selection of sample data) do researchers need to keep in mind? What are the limitations of sampling in conducting research?
- What considerations need to be taken into account regarding measurement?
Then, with these thoughts in mind, critique the articles “Assessing the Performance of Freestanding Hospitals” and “A National Study of Efficiency for Dialysis Centers” in this week’s Learning Resources. What are the strengths and weaknesses of each of the studies?
- Describe the strengths and weaknesses of each of the studies described in the articles, as well as the sample design(s). Be sure that your analysis takes into account sampling and measurement.
SAMPLE SOLUTION
McCue, Diana and Hennum (2007) sought to assess the performance of free standing hospitals and, therefore, examined the market, management, financial and mission factors associated with freestanding hospitals with consistent positive cash flows. Through logistic regression, the same factors are then compared to those of freestanding hospitals with inconsistent positive cash flows. One of the main strengths of the study was that the performance of the two types of hospitals were compared based on similar factors, and this increased both validity and reliability of their findings. If a similar research was to be conducted to compare factors of efficiency within the healthcare industry, the approach used in this research could be considered. In contrast, the sampling was weak since the research did not include hospitals that have joined multi-hospitals. The researchers could have also included these hospitals in order to illustrate the increasing demand by freestanding hospitals to join a group of hospitals for better performance as they perform better in such groups.
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