NRS 433 Provide examples of experimental and nonexperimental research design
NRS 433 Provide examples of experimental and nonexperimental research design
An experimental research design uses a highly controlled environment where the researcher manipulates variables to observe their effect on the end result (Helbig, 2022). An example of an experimental design is testing a new drug. One group of people will be the control and another will be the experimental group. The control group will be given a placebo pill and the experimental group will be given the drug so that the researchers can monitor the effectiveness of the drug. The difference between experimental and non-experimental research designs is the ability of researchers being able to control different variables. A type of non experimental research is a correlational study. This type of research measures the statistical relationship between variables to determine a cause and effect relationship (Helbig, 2022). Non-experimental research does not require any type of control group or a manipulation of any variables (Glasofer & Townsend, 2020). An example of a non experimental research study would be determining the effects of chemotherapy and fatigue for patients.
Glasofer, A., Townsend, A., (2020). Determining the level of evidence: Nonexperimental research designs. Nursing Critical Care 15(1):p 24-27. DOI: 10.1097/01.CCN.0000612856.94212.9b
Helbig, J. (2022). Nursing Research: Understanding Methods for Best Practice. (GCU). https://bibliu.com/app/#/view/books/1000000000588/epub/Chapter1.html#page_91
Experimental research design in nursing involves manipulating an independent variable to determine its effect on a dependent variable. Examples of experimental designs in nursing research include randomized controlled trials and quasi-experimental designs. In these designs, the researcher has a high level of control over the study’s variables, and the research is conducted under highly controlled conditions.
On the other hand, non-experimental research designs in nursing do not involve manipulation of independent variables, and instead, rely on observation and data collection to draw conclusions. Examples of non-experimental designs in nursing research include descriptive studies, case-control studies, and cohort studies. In non-experimental designs, the researcher has less control over the study’s variables, and the research is conducted in less controlled conditions.
According to Polit and Beck (2021), “Experimental designs are the most powerful way to establish causality because they offer the highest level of control over extraneous variables” (p. 234). This highlights the level of control that experimental designs offer in nursing research.
On the other hand, Polit and Beck (2021) stated that “Nonexperimental designs are useful for investigating phenomena when manipulation of an independent variable is not possible, practical, or ethical” (p. 209). This demonstrates the usefulness of non-experimental designs in situations where manipulation of independent variables is not feasible.
Polit, D. F., & Beck, C. T. (2021). Nursing research: Generating and assessing evidence for nursing practice. Wolters Kluwer.
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Experimental Design is creating a detailed practical plan that allows you to obtain the maximum amount of
information specific to your objectives. Experimental design is an efficient method of optimizing the experimental conditions to maximize the amount of helpful information obtained with the minimum number of experiments. It provides a more efficient and complete optimization compared with the ‘vary one factor at a time approach with other factors assigned fixed values. Advantages of experimental design include scientific manuscripts that will be much easier to read and comprehend. A proper experimental design serves as a road map to the study methods, helping readers to understand more clearly how the data were obtained and, therefore, assisting them in properly analyzing the results.(Knight, 2010).
Knight, K. L. (2010, January). Study/Experimental/Research Design: Much More Than Statistics. NCBI. Retrieved March 24, 2023, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2808761/
Experimental research design is a type of quantitative research that involves the manipulation of variables to establish cause-and-effect relationships. In nursing, experimental research designs can be used to investigate the effects of nursing interventions on patient outcomes. For instance, a study by Huang et al. (2020) examined the effects of an educational program on the quality of life of patients with chronic kidney disease. The study used a randomized controlled trial design, where patients were randomly allocated to either an intervention group that received the educational program or a control group that did not receive the program. The study found that patients who received the educational program had a higher quality of life than those in the control group.
Experimental research designs provide a high level of control over extraneous variables, which enhances the internal validity of the study (Polit & Beck, 2022). In addition, experimental designs allow researchers to establish cause-and-effect relationships between variables, which enhances the external validity of the study.
Non-experimental research design is a type of quantitative research that does not involve the manipulation of variables. Instead, it relies on observations or data that have already been collected. In nursing, non-experimental research designs can be used to investigate the prevalence of health conditions or to explore the experiences of patients or nurses. For instance, a study by Tonna et al. (2020) explored the experiences of nurses who cared for patients with COVID-19. The study used a qualitative design, where data were collected through interviews with nurses who had cared for COVID-19 patients. The study found that nurses experienced emotional and physical exhaustion, anxiety, and fear while caring for COVID-19 patients.
Non-experimental research designs provide a lower level of control over extraneous variables, which may affect the internal validity of the study (Polit & Beck, 2022). However, non-experimental designs allow researchers to explore complex phenomena that cannot be manipulated in a laboratory setting.
Experimental research designs provide a high level of control over extraneous variables, which enhances the internal validity of the study (Polit & Beck, 2022). In experimental designs, researchers can control for confounding variables by randomization, blinding, and manipulation of variables. This ensures that the effect observed in the study is solely due to the intervention and not due to other factors.
On the other hand, non-experimental research designs provide a lower level of control over extraneous variables. In non-experimental designs, researchers cannot manipulate variables, and there is no control group for comparison. As a result, the observed effect may be due to other factors such as chance, selection bias, or confounding variables.
Huang, X., Lin, L., Jiang, X., & Lv, C. (2020). Effect of a self-management education program on the quality of life of patients with chronic kidney disease: A randomized controlled trial. International Journal of Nursing Studies, 111
Polit, D. F., & Beck, C. T. (2022). Nursing Research: Generating and Assessing Evidence for Nursing Practice (11th ed.). Wolters Kluwer.