By subtracting a student's posttest score from the pretest score and dividing by the standard error of the difference score,you achieve this score.
A)Cut-off point
B)Absolute change
C)Reliable change index
D)Percent of nonoverlapping data points

Question

Quizplus · Accepted Answer

The calculation described is used to determine the reliable change index (RCI), which is a statistical measure used to determine if a change in score from pretest to posttest is statistically significant and not just due to chance or measurement error. The RCI takes into account the standard error of measurement and provides a threshold for determining if a change in score is meaningful or significant. Therefore, the best choice is C - reliable change index.

By Subtracting a Student's Posttest Score from the Pretest Score