Question

Provide examples of experimental and nonexperimental research design. Contrast the levels of control applied to each.

at least a reference

Answer 1

In the case of observational research, the researcher does not intervene with the experimental conditions, instead, observe the changes occurring from several aspects and determine the factors influencing. For example, surveys, and case studies.

The results of Observational research leads to experimental research. However, it cannot find the cause-effect relationship.

In experimental studies, the researcher manipulates the exposure conditions and allows the different groups to receive different treatments or receive the same treatment and exposure to different factors etc. The advantages of experimental research are, it allows the manipulation of experimental conditions and finds the cause-effect relationship. Eg: Randomized controlled study.

Reference:

McBurney, D. H., & White, T. L. (2009). Research methods. Cengage Learning.