eexisting groups. For example, a researcher may want to compare student There ar

Question

eexisting groups. For example, a researcher may want to compare student There are occasions when a researcher must examine p performance for a high school that encourages students to use their phones and tablets during class with student performance in a high school that bans the use of electronic devices. In this study, the researcher does not have control over which individuals are assigned to which group; the two groups of participants already exist. Because the researcher cannot use random assignment or matching to minimize the individual differences between groups, there is no assurance that the two groups are equivalent. In this situation, the research study is called a nonequivalent group design.

Explanation / Answer

Answer:-

The first scenario represents Differential research design. It studies the difference between the two preexisting variables.

The second scenario represents pretest-posttest nonequivalent control group. It includes tesing at both the levels i.e. before the test begins and after it gets finished.

The third scenario represnts posttest only nonequivalent control group.

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