In quasi-experimental designs, there is a comparison group that is comparable to the experimental group in critical ways but the subjects are not randomly assigned to the comparison and experimental groups.

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Quasi-experimental designs use a comparison group that is comparable to the experimental group in critical ways, but the subjects are not randomly assigned to the groups. This is a key difference between quasi-experimental designs and true experimental designs, where random assignment is used to ensure equivalence between groups.

In Quasi-Experimental Designs, There Is a Comparison Group That Is