One concern for a repeated-measures study is that a participant's score in one treatment may be influenced by practice or experience gained in a previous treatment.

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In a repeated-measures study, participants are exposed to multiple treatments or conditions, and their scores are compared across these conditions. However, the order in which these conditions are presented can sometimes affect participants' performance. This is known as an order effect, and it can be due to practice, learning, or fatigue. Researchers can minimize order effects by counterbalancing the order of conditions across participants.

One Concern for a Repeated-Measures Study Is That a Participant's