In the within-subjects design, the effects of treatment order can be controlled by:

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Counterbalancing involves systematically varying the order in which treatments are given to different participants or within the same participant. This helps to control for the effects of treatment order by ensuring that any order effects are distributed equally across all groups or conditions. Matching and blocking do not specifically address the issue of treatment order, while repeated measures designs involve the same participants receiving all treatments in a randomized order, which may not be feasible or practical in all situations.

In the Within-Subjects Design, the Effects of Treatment Order Can