For a within-subjects experiment,one disadvantage of a multiple-treatment design compared to a two-treatment design is that the likelihood of participant attrition increases as the number of treatments increases.

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In a multiple-treatment design, participants are required to undergo more sessions or conditions, which can lead to increased fatigue, time commitment, and potential dropouts, thus increasing the likelihood of participant attrition.

For a Within-Subjects Experiment,one Disadvantage of a Multiple-Treatment Design Compared