Provide examples of experimental and non-experimental research design

Document Type:Essay

Subject Area:Nursing

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Two or more groups exposed to different conditions (treatment intervention) are observed for results (treatment outcome). It is majorly used to justify hypotheses based on a well-designed experimental study. There are three broad categories of experimental research design. They are differentiated based on the extent to which the researcher groups and expose the subjects to conditions. True experimental designs are characterized by random selection of participants with the researcher having complete control of extraneous variables meaning that the results found are as a result of manipulation of the independent variable. 1 Overview of Non-Experimental Research – Research Methods in Psychology", n. d. In terms of the level of control, non-experimental research design the researcher does not control for threats to internal validity since manipulation nor randomization not done.

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This design therefore has a low internal validity. Experimental research is highest in internal validity because of manipulation of the independent variable and control of extraneous variables which guide in ruling out alternative explanations for the observed relationships ("6. Generalizability in nursing research is the degree of measure to which the results from a research sample is assumed to apply to the entire population under study. Three models of generalization exists: sample-to-population or statistical generalization, analytic generalization, and case-to-case transfer generalization or transferability. The concept of generalization is mostly used in medical research because the number of patients in research are sampled and the results obtained is assumed to depict those of a larger population of patients suffering from the condition under study, when all variables are kept constant.

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