influencing external validity are subtle and may not be reported in research

Influencing external validity are subtle and may not

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influencing external validity are subtle and may not be reported in research reports; however, the researcher must be responsible for these factors. Generalization is usually narrower for a single study than for multiple replications of a study using different samples, perhaps from different populations in different settings. DIF: Cognitive Level: Analysis REF: Page 202 8.Why does subject attrition affect internal validity? DIF: Cognitive Level: Synthesis REF: Page 200 9.Aside from random assignment using a large sample, what are ways to structure a design that control for known extraneous variables? (Select all that apply.)
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