2 – 3 paragraphs O t h e r
1 In 2–3 paragraphs, in your own words, compare the following observational studies: cross-sectional, case-control, and cohort studies.
- Indicate the levels for which measures are being obtained in each type of study.
- Describe the purpose for which each study design is used.
- Explain a potential type of bias for each study design.
- Identify the measures of association for each type of study.
Describe accuracy, time commitment, and disadvantages for each type of study
2 In 2 –3 paragraphs, in your own words, compare controlled and quasi-experimental studies.
- For each type of study, describe the method for choosing participants.
- Describe the disadvantages and advantages to each type of study.
- Explain the ethical challenges for each type of study.
- Describe the strategies used to ensure validity within each type of study.
3 Find an observational study in the Walden Library on the disease you chose for PE4001. In 2–3 paragraphs, address the following about the study.
- Reference the research study in APA format.
- Identify the research question.
- Explain the study design that was used in the research study and justify the selection of this study design.
- Identify the participants. Be specific on the descriptive factors.
- Identify the independent and dependent variables.
- There may be more than one variable, depending on the type of study.
- Explain how the independent and dependent variables are measured.
- Identify the selection criteria for cases and controls. (Indicate in the response if this is not applicable.)
- Explain the main results of the study.
- Explain the ethical issues involved in the study design.
- Identify the limitations noted by the authors that may represent potential bias.
- If the authors did not identify any limitations, identify one potential type of bias for the study.
4 Consider the study you found in the previous item. Assume the study is similar to one you would conduct on the disease but does not fully meet your research needs. Compare the previous study to one you would design by addressing the following in 2–3 paragraphs.
- Explain how you would change the research question to meet the needs of the study you designed.
- Explain whether or not you would change the participants.
- Explain how you would change the dependent and independent variables to meet your research needs.
- Explain how you would change the method of measuring the variables.
- Explain the selection criteria for cases and controls you would choose. (Indicate in the response if this is not applicable to your research.)
- Describe the ethical issues that you might encounter in your changed study.
- Describe the bias that you would need to consider, and explain how you might limit the impact of bias on your study.