Which of these statements is true for a matched-pair design?

A. The purpose of this design is to help control for variables other than the one being studied.
B. Each subject is paired with another from a different demographic to ensure diversity.
C. The matched-pair design always requires two individuals in a pair.
D. The matched-pair subjects are randomly assigned, with both subjects assigned to the treatment or both to the control.

In a matched-pair design, individuals with similar attributes are paired, with one in the experimental group and the other in the control group to control for variables other than the one being studied.

Explanation:

Matching is a method in quasi-experimental design where researchers pair participants based on similar attributes. In a matched-pair design, individuals with comparable characteristics are paired, one going to the experimental group and the other to the control group. This design helps control for variables other than the one being studied, ensuring clearer results.

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