Evaluating Operational Definitions Researchers should anticipate the possibility of a ____ threat when they assign subjects to conditions using extreme test scores and retest these subjects after administering a treatment.
A)history
B)maturation
C)statistical regression
D)testing

Question

Quizplus · Accepted Answer

Extreme test scores are likely to be flukes, and therefore will likely regress to the mean on subsequent testing. This effect can be mistaken for an effect of treatment, leading to a statistical regression threat to internal validity.

Evaluating Operational Definitions Researchers Should Anticipate the Possibility of a ____