Quasi-experimental designs do not use random assignment of groups and instead employ matching or other means of obtaining equivalence of groups.Quasi-experimental designs include time-series and counterbalanced designs.

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Quasi-experimental designs do not use random assignment to create groups, which is a hallmark of true experimental designs. Instead, they rely on methods like matching to ensure groups are equivalent. Time-series and counterbalanced designs are indeed types of quasi-experimental designs, used when random assignment is not feasible.

Quasi-Experimental Designs Do Not Use Random Assignment of Groups and Instead