When individuals in one group of a nonequivalent control group design experience natural changes at a faster rate than individuals in the other group,there is danger of a threat to internal validity called
A) additive effects of selection and history.
B) additive effects of selection and maturation.
C) additive effects of selection and instrumentation.
D) differential statistical regression.

Question

Quizplus · Accepted Answer

When individuals in one group of a nonequivalent control group design experience natural changes at a faster rate than individuals in the other group, it can lead to a threat to internal validity called the additive effects of selection and maturation. This occurs when there are differences in the maturation rates and/or developmental stages between the two groups, which can affect the outcomes being measured.

When Individuals in One Group of a Nonequivalent Control Group