In a nonequivalent group design, it is possible that the treatment group and the comparison group will change differentially as they get older. Therefore, any changes in the DV may be caused by this differential change instead of the IV. This threat to internal validity is known as
A) maturation.
B) instrumentation.
C) history.
D) statistical regression.

Question

Quizplus · Accepted Answer

Maturation refers to changes in participants that occur over time, such as aging, which can affect the dependent variable independently of the independent variable.

In a Nonequivalent Group Design, It Is Possible That the Treatment