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Analysis and Evaluation of Quasi-Experimental Designs in Educational Research

Solved assignment evaluating quasi-experimental designs in educational research.

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1Quasi-experimental DesignJackson (2012) Chapter Exercises#2.The psychology professor has two sections of students that were not randomlyassigned. The treatment will be weekly quizzes. The desired outcome is improved studentlearning. I will assume that student learning is measured by the total score on all exams notincluding the weekly quizzes. This design can be diagrammed with the following notation:NXONOBased on these assumptions I would recommend a nonequivalent control group posttest onlydesign for this quasi experiment.If student learning is measured by scores on major exams through the course, however,the notation changes, as would the recommendation. The following notation represents analternative possibility for this design:NXOXONOOBased on these assumptions, I would recommend a nonequivalent control group time-seriesdesign for this experiment. Overall, this later design is a stronger design because of the multipleobservations and points of comparison between the two sections.#4.Usually the nonequivalent control group design uses intact groups. Since thesegroups are not randomly selected, the major confound for this design is selection bias. Selectionbias arises when the control and experimental groups are not comparable before the study andgives an alternative explanation for any differences in the posttest. In this design there are acouple of social interaction threats that are possible. Students in the experimental section may

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Statistics

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