Why do the authors say that matching on pretest scores only makes your groups APPEAR to be identical rather than actually making the groups identical?
A) Participants are matched on measures of characteristics rather than on the characteristics themselves.
B) Participants are not matched on every single variable.
C) both a and b
D) neither a nor b

Question

Quizplus · Accepted Answer

Matching on pretest scores can make groups appear identical because it aligns them based on certain measures, but it doesn't account for all possible variables or underlying characteristics, which can still differ between groups.

Why Do the Authors Say That Matching on Pretest Scores