I need help with a discussion.

After reading Chapter 5 in the course text and the instructor guidance, 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.