While true experiments contain the highest degree of control, they are not always possible in some situations. Quasi-experiments are similar to experiments in that they include some type of manipulation to compare two or more conditions; however, they do not have complete control over the variables in a study. Thus, they do not meet all of the conditions required for an experiment. Select one of the quasi-experimental designs discussed in the chapter and propose your own study that would use that design. Explain why that design is necessary over an experimental design. With respect to your proposed study, discuss some of the potential threats to validity and how those may impact the overall results. How could you change your proposed study to make it a true experimental design? Post should be at least 625 words.
Cox Jr., L. (2007). Regulatory false positives: True, false, or uncertain?. Risk Analysis: An International Journal, 27(5), 1083-1086. [Retrieved from EBSCOhost].
Odom, L. R., & Morrow Jr., J. R. (2006). What’s this r? A correlational approach to explaining validity, reliability and objectivity coefficients. Measurement in Physical Education & Exercise Science, 10(2), 137-145. [Retrieved from EBSCOhost].
Tate, R. L., Mcdonald, S., Perdices, M., Togher, L., Schultz, R., & Savage, S. (2008). Rating the methodological quality of single-subject designs and n-of-1 trials: Introducing the Single-Case Experimental Design (SCED) Scale. Neuropsychological Rehabilitation, 18(4), 385-401. [Retrieved from EBSCOhost].
Experiment-resources.com (2017). Quasi-Experimental Design. Retrieved from https://explorable.com/quasi-experimental-design (Links to an external site.)
StatSoft, Inc. (2017). Electronic statistics textbook. Retrieved from http://www.statsoft.com/textbook/ (Links to an external site.)
Trochim, W. M. K. (2006). Research methods: Knowledge base. Retrieved from http://www.socialresearchmethods.net/kb/
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