Question: Resolve A behavior analyst is completing a study on the effects of training on staff's implementation of a behavior plan. At the start of the

Resolve

A behavior analyst is completing a study on the effects of training on staff's implementation of a behavior plan. At the start of the study, Ruel and Saanvi were the research assistants collecting data. However, toward the end of the study, new research assistants took over collecting data. Which threat to internal validity is described in this scenario? O A. Maturation B. Testing C. Instrumentation D. Selection bias

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