NRS 445 Topic 3 DQ 1

Sample Answer for NRS 445 Topic 3 DQ 1 Included After Question

Assessment Description

Compare independent variables, dependent variables, and extraneous variables. Describe two ways that researchers attempt to control extraneous variables. Provide an example of how this is applied using a peer-reviewed, primary research article.

Initial discussion question posts should be a minimum of 200 words and include at least two references cited using APA format. Responses to peers or faculty should be 100-150 words and include one reference. Refer to “RN-BSN Discussion Question Rubric” and “RN-BSN Participation Rubric,” located in Class Resources, to understand the expectations for initial discussion question posts and participation posts, respectively.

A Sample Answer For the Assignment: NRS 445 Topic 3 DQ 1

Title: NRS 445 Topic 3 DQ 1

The research process requires that the researcher possess adequate knowledge regarding various aspects of research. For example, an individual needs to know and differentiate between variables as the nature of variables direct aspects such as methodology, data collection, data analysis and data interpretation. The most common variables include independent variables, dependent variables, and extraneous variables. In research, the independent variable refers to the variable a researcher changes or manipulates to explore its effects on other variables (Flannelly et al.,2020). The implication is that in a typical cause-and-effect relationship, it is the cause aspects. It is usually controlled to observe how such controls carried out affect the dependent variable

The dependent variable is the variable that a researcher measures or observes to explore the impact of an independent variable. As such, it is the outcome or effect in a typical cause-and-effect relationship. As such, this value changes based on the adjustments made to the independent variable. The other variable is the extraneous variable. In a typical research situation, an extraneous variable refers to a variable that the researchers are not targeting or focusing on. However, they have the ability to affect the results (Flannelly et al.,2020). They have the capability of affecting the true relationship that may exist between the dependent and independent variables.

The potential negative impacts of extraneous variables on the research findings mean that there is a need to control them. One way of controlling them is through matching. During matching, the researchers pain the research subjects possessing similar key characteristics followed by a random assignment to different experimental conditions (Howell et al.,2021). The other strategy is through random assignment, where the researchers randomly assign the research subjects to different experimental groups. Such an action is key to distributing the extraneous aspects equally among the study groups. An example of how this is applied in peer-reviewed primary research articles is an article by Mottahedi et al. (2023), who used randomization to control extraneous variables.


Flannelly, L. T., Flannelly, K. J., & Jankowski, K. R. (2020). Independent, dependent, and other variables in healthcare and chaplaincy research. In Quantitative Research for Chaplains and Health Care Professionals (pp. 34-43). Routledge.

Howell, K., Barnes, M., Randall Curtis, J., Engelberg, R. A., Lee, R. Y., Lober, W . B., … & Cohen, T. (2021). Controlling for confounding variables: accounting for dataset bias in classifying patient-provider interactions. Explainable AI in Healthcare and Medicine: Building a Culture of Transparency and Accountability, 271-282. Doi: 10.1007/978-3-030-53352-6_25

Mottahedi, M., Shamsi, M., Babani, S. F., Goli, S., & Rizevandi, P. (2023). Comparing the effect of transcutaneous electrical nerve stimulation and massage therapy on post laparoscopic shoulder pain: a randomized clinical trial. BMC Musculoskeletal Disorders24(1), 764. Doi: 10.1186/s12891-023-06905-w