Which of the following types of quasiexperimental design is implemented when subjects are not randomly assigned to groups?

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The nonequivalent control group design is implemented when subjects are not randomly assigned to groups. In this design, participants are assigned to either the experimental or control group based on some pre-existing characteristic, such as age or gender. This can lead to potential confounding variables that may affect the results, so careful analysis and interpretation of the findings is necessary. The other options listed all involve some form of randomization in the assignment of participants to groups.

Which of the Following Types of Quasiexperimental Design Is Implemented