Further Notes on Repeated-Measures Analyses
Advantages of the Repeated-Measures Design versus the Between-Subjects Design
An alternative to the repeated-measures design is a between-subjects design, as described in Chapter 9. For example, you could have followed a between-subjects design in which two groups would be measured at only one point in time: immediately following the weekend program (at Time 2, from Figure 12.3). In this between-subjects study, one group of couples would attend the weekend encounter, and the other group would not attend. If you conducted the study well, you could then attribute any differences in the group means to the weekend experience.
With both the repeated-measures design and the between-subjects design, the ...