Explain how the presence of a control group accounts for
Explain how the presence of a control group accounts for threats to internal validity. Summarize the types of threats to internal validity that can be avoided by utilizing random assignment to control and experimental groups.
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1 to what does the term internal validity refera the degree to which results of a study can be generalized from one
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explain how the presence of a control group accounts for threats to internal validity summarize the types of threats to
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