The use of existing natural groups of participants often results in

Question

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The use of existing natural groups of participants, such as students in a particular class or employees in a particular department, often results in non-equivalent groups. This is because these groups may differ in some important way that could affect the outcome of the study, such as age, gender, or previous experience. Therefore, researchers must be careful when using natural groups and may need to use statistical techniques to control for these differences.

The Use of Existing Natural Groups of Participants Often Results