The tendency of scores that are well below the mean to move up toward the mean on retesting, and the tendency of scores that are well above the mean to move down toward the mean on retesting is called:
A) Selection effect
B) Maturation effect
C) Instrumentation effect
D) Regression artifact effect

Question

Quizplus · Accepted Answer

This phenomenon is known as the regression artifact effect, where extreme scores tend to move closer to the average upon retesting due to statistical regression toward the mean.

The Tendency of Scores That Are Well Below the Mean