Extreme scores moving to the mean on subsequent testing is regression to the mean.

Question

Quizplus · Accepted Answer

Regression to the mean is a statistical phenomenon where extreme scores on a particular variable tend to move closer to the mean on subsequent measurements. This is due to the fact that extreme scores are often the result of chance errors or temporary situational factors, rather than stable characteristics. Therefore, when retested, these individuals are likely to exhibit scores that are closer to the average for their group.

Extreme Scores Moving to the Mean on Subsequent Testing Is