Which of the following best describes the relationship between stability, magnitude, and internal validity?
A. The less stable a measure within each phase and the smaller the magnitude of changes between each phase, the higher the internal validity of a single-case design.
B. The stability and magnitude of change in a dependent measure is only related to internal validity when the measure is initially unstable in the baseline phase.
C. The more stable a measure within each phase and the greater the magnitude of changes between each phase, the higher the internal validity of a single-case design.
D. The stability and magnitude of change in a dependent measure is not related to internal validity.
Ans: C
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