What kind of study uses a methodology in which participants are matched on a particular characteristic before being assigned to the different levels of the independent variable?

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A study that uses a methodology in which participants are matched on a particular characteristic (such as age, gender, or IQ) before being assigned to the different levels of the independent variable is called a matched subjects design. This design is often used to control for individual differences that might otherwise confound the results of a study.

What Kind of Study Uses a Methodology in Which Participants