NR 505 Week 3 Elements of Quantitative Research Design and Sampling
University:
Chamberlain University
NR 505 Week 3 Elements of Quantitative Research Design and Sampling
Paper Instructions
The focus of the Week 3 discussion is on two important elements of quantitative research studies- design and sampling. The approach or design, quantitative or qualitative, also applies to EBP projects. Both quantitative and qualitative have different designs or traditions that fall under these two broad categories.
Select a single-study quantitative research study article related to your specialty track and provide the permalink to the article. Then discuss each of the following items:
- Identify whether the research study design is experimental, quasiexperimental, or nonexperimental. Provide the rationale for your answer.
- Identify the appropriate representation for the research study article you selected using the nomenclature of X for intervention, O for observation and data collection, and R for random a assignment to a research study group.
- Identify the type of sampling (probability vs. nonprobability) that was used in the research study article you selected.
- Identify one advantage and one disadvantage to the sampling type used (probability vs. nonprobability).
- Identify whether there was random assignment to research study groups in the research study article you have selected.
- If random assignment to groups was used, how does this strengthen the research study design?
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Sample Answer
The single quantitative research study article that I have chosen is an article that discusses; does aerobic exercise reduce postpartum depressive symptoms?
Throughout this article it looks at the population of mothers that are one year or less postpartum and women with depressive symptoms that are measured by a questionnaire or diagnostic tool (Pritchett, Daley, & Jolly, 2017). This particular research study I would have to say is non experimental because there is intervention but one does not have control over whether or not these postpartum mothers exercise and how much they exercise, they have to go by what they say they do and the intensity of their exercise.
Intervention is that there were different trial groups which included; group exercise interventions, exercise counseling was provided and the participant was allowed to choose their own form of exercise (Pritchett, Daley, & Jolly, 2017). They were aiming to achieve approximately 30 minutes of moderate exercise three to five times weekly. The observation/data collected during this was to see if exercise had an effect on decreasing depressive symptoms in postpartum women. The study did find that overall exercise is an effective treatment for postpartum depression. The random assignments were of women whom chose their own exercise that they did, women that were assigned to groups for exercise, and other women that received exercise counseling (Pritchett, Daley, & Jolly, 2017).
When looking at probability vs non-probability for this article I would have to go with non-probability for this because this just focuses on postpartum women, so not all postpartum women if they are one year of having a baby would not qualify for this study. Non-probability is when not every member of the population has the same chance of being included in the study. This study focuses on women whom are one year or less postpartum.
An advantage to using non-probability is the population being studied is narrowed down to just mothers whom are one year postpartum. A disadvantage to this is that postpartum depression can last past one year of childbirth in some women. So these women are being excluded from the study.
A random assignment was used for this study as women were either in a group, had counseling, or chose the exercise that they wanted to do. This can strengthen the study as it narrows down what area was most effective whether it be exercise in a group setting, individualized, or the counseling about exercise.
- Pritchett, R. V., Daley, A. J., & Jolly, K. (2017). Does aerobic exercise reduce postpartum depressive symptoms? British Journal of General Practice, 67. https //doi.org/10.3399/bjgp17x692525 (Links to an external site.)Links to an external site.
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