The following problems represent different situations in the repeated measures designs in which practice effects need to be balanced.

A. Consider a repeated measures experiment using a complete design involving one independent variable. The independent variable in the experiment is task difficulty with three levels (Low, Medium, and High). You are to prepare an order for administering the conditions of this experiment so that the independent variable is balanced for practice effects. You are first to use block randomization to balance practice effects and then to use ABBA counterbalancing to balance practice effects. Each condition should appear twice in the order you prepare.

B. Consider a repeated measures experiment using an incomplete design. The independent variable in the experiment is the font size in which a paragraph has been printed, and there are six levels (7, 8, 9, 10, 11, and 12). Present a table showing how you would determine the order of administering the conditions to the first six participants of the experiment. Be sure that practice effects are balanced for these participants.