Regression to the Mean Is a Threat to the Internal

question 25

Multiple Choice

Regression to the mean is a threat to the internal validity of the pretest/posttest design whenever

• A) a long time transpires between the two observation periods.
• B) program participants get older between the two observations.
• C) people are chosen for a program because initial observations showed that they needed the program more than others did.
• D) evaluators gain experience making the observations for the pretest and the posttest.

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