Single-case experimental designs use several strategies to improve their internal validity.Which of the following is one of these strategies?

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Repeated measures is a strategy used in single-case experimental designs to increase internal validity by having the participant serve as their own control, reducing the impact of individual differences and extraneous variables. Random assignment is not applicable in single-case designs, as there is only one participant. Process measures and placebo controls may be used in some cases, but they are not specific strategies used to improve internal validity in single-case designs.

Single-Case Experimental Designs Use Several Strategies to Improve Their Internal