compare and contrast the similarities and differences between  experimental and quasi-experimental designs. Describe the different ways  in which an independent variable can be manipulated. Demonstrate  application of the scientific method and ethical principles by  explaining what dictates the selection of design (experimental versus  quasi-experimental) and the type of manipulation used in a research  study. Finally, give an example of a situation that could be studied  with an experiment or quasi-experiment and assess the appropriateness of  one design over the other in light of practical and ethical concerns.

Your initial post should be 250 to 300 words. Utilize a minimum of  two peer-reviewed sources that were published within the last 10 years  and are documented in APA style, as outlined in the Ashford Writing  Center.