In a study examining the effectiveness of an SAT prep course, the researcher is considering how at prettests some students might have been having a bad day and their scores were artificially low. This is an issue of ______.
A) testing
B) maturation
C) regression
D) subject attrition

Question

Quizplus · Accepted Answer

This is an issue of regression, specifically regression to the mean, where extreme scores on a pretest tend to move (regress) towards the average on a posttest, which can be mistaken for a real change.

In a Study Examining the Effectiveness of an SAT Prep