Overall dependent-groups designs: Question 13 options: 1) Decrease power of a study because you maximize the difference between groups and minimize the error variability in scores 2) Increase power of a study because you minimize the difference between groups and minimize the error variability in scores 3) Increase power of a study because you maximize the difference between groups and minimize the error variability in scores 4) Increase power of a study because you minimize the difference between groups and maximize the error variability in scores