NR 505 Week 3 Discussion

Elements of Quantitative Research: Design and Sampling

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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Elements of Quantitative Research: Design and Sampling: NR 505 Week 3 Discussion SAMPLE

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.

SAMPLE RESPONSE

Thank you for your informative and interesting post. While reading it, I had many light bulbs light up of different ways or many other ways to conduct this type of research. Today technology plays a huge role in fitness. A better way that one could keep track of the actual amount of time spent doing exercise instead of simply relying on good faith is having the postpartum mothers wear a fit bit or some other type of smart watch that can keep track of data such as exercise, steps, and heart rate. If I was the one that set up this research study, I would have improved the EBP proposal because science has already established that exercise reduces cortisol and released endorphins. I would have compared exercise to pharmacological interventions to prove which may be more beneficial in the long run. In addition, for the sample that is used, I feel that the guidelines need to be more specific because from just after delivery to one year a lot can change and some women cannot begin physical activity right away due to c-sections which may put those women at a disadvantage.
Thank you

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