Differences between experimental and quasi-experimental designs

Differences between experimental and quasi-experimental designs

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.
Also, 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.

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There are some similarities and also differences between the experimental and quasi-experimental designs. One of the similarities in these two research deigns is that they both randomly select their research subjects. In experiments, the psychologists randomly select the patients to observe, whereas in quasi-experiments, the psychologist randomly selects the patients to observe and the ones to use as controls………………

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