By subtracting a student's pretest score from the posttest 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
C.
Explanation: Reliable change index is calculated by subtracting a student's pretest score from the posttest score and dividing by the standard error of the difference score.
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