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This 5 page paper provides a comparative view of experimental vs. quasi-experimental designs. This paper outlines the basic differences and the benefits or challenges perceived in both. Bibliography lists 4 sources.
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5 pages (~225 words per page)
File: MH11_MHExper33.rtf
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Unformatted sample text from the term paper:
are used to assess the impact of exposure to defined variables on a subject group, comparing the outcomes of exposure to a control group that is not exposed. The
key to true experimental design, then, has to do with the random assignment of subjects. True experimental designs share three basic
elements in their construction: they have two or more purposively created subject groups; they provide a means of comparing the same measured outcomes; and individuals are assigned to these
groups based on a random selection or random assignment process (Gibbons and Herman, 1997). In addition, while demographic variables may be an element in assessing the overall outcomes of
the study, the assignment of individuals to differentiated groups, these groups can not include background variables like gender and ethnicity because these groups cannot be purposively manipulated (Gibbons and Herman,
1997). Quasi-Experimental Design Quasi-experimental design uses many of the same elements as experimental design, but is used when it is not feasible for the researcher to
assign individuals to groups randomly (Gibbons and Herman, 1997). Quasi-experimental designs are used when studies are so specific or limited by population size that random assignment cannot occur.
Quasi-experimental designs still utilize a comparative format and measure outcomes of exposure to variables, but they cannot claim the same level of experimental veracity because of the limits of the
controls defined by random assignment. Quasi-experimental designs, then, are commonly used to assess the use of specific programs, including educational programs or psychological interventions, when random assignment is neither
possible nor practical (Gibbons and Herman, 1997). Comparison: Advantages and Disadvantages of Both True experimental designs are generally believed to be the most rigorous in terms
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