Final answer:
A reason for using a quasi-experimental study rather than a randomized control trial can be ethics, efficiency, or a smaller scope.
Step-by-step explanation:
One reason that might result in the usage of a quasi-experimental study rather than a randomized control trial is ethics. In certain situations, it may be considered unethical or impractical to randomly assign participants to different groups. For example, if the study involves testing the effectiveness of a specific medication, it may be unethical to assign some participants to a placebo group if they require immediate treatment.
Furthermore, efficiency can be a reason for choosing a quasi-experimental study. Randomized control trials often require a large sample size and a longer duration to ensure statistical power. In some cases, a quasi-experimental design can provide similar insights with a smaller sample size and shorter duration.
Lastly, a smaller scope can also lead to the usage of a quasi-experimental study. Randomized control trials require careful planning, resources, and time. If the research question is focused on a narrow topic or specific population, a quasi-experimental study can be more feasible and practical.
Learn more about reasons for using a quasi-experimental study rather than a randomized control trial