When analyzing interval data from a repeated-measures design, with a separate control group, the t ratio must be established between
A) the "pre" and "post" scores
B) the "post" scores, without reference to the "pre" scores
C) the "pre" scores, without reference to the "post" scores
D) the "change" scores of the experimental and control groups

Question

Quizplus · Accepted Answer

The correct approach for analyzing interval data from a repeated-measures design with a separate control group involves comparing the "change" scores between the experimental and control groups. This method accounts for the effect of the intervention by focusing on how much change occurred from before to after the intervention in each group.

When Analyzing Interval Data from a Repeated-Measures Design, with a Separate