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Why Quasi-Experimental Designs Are Used So Frequently

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Why are quasi-experimental designs used more often than experimental designs?

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One reason quasi-experimental designs are used more often than experimental designs is because the groups are already formed. Researchers often want to answer questions regarding behaviors or outcomes in natural settings in pre-formed groups of subjects.

Quasi-experimental designs are very similar to true experimental designs, but the one major difference is ...

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This solution discusses why quasi-experimental designs are used more frequently than experimental designs.