One method which is used in order to create equivalent groups of subjects is the matched-subjects design.

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The matched-subjects design is a method used to create equivalent groups of subjects. This involves matching subjects based on certain characteristics such as age, gender, and other relevant variables before assigning them to different treatment groups. By doing so, the groups are equalized on these characteristics, which increases the validity of the study and allows for more accurate comparisons to be made between treatment groups.

One Method Which Is Used in Order to Create Equivalent