The use of a diverse sample of study participants in multiple sites might affect which of the following?
A) Replicability of the study
B) The ability to use randomization
C) The ability to use blinding as a strategy
D) The study's external validity
D
Feedback:
External validity concerns inferences about generalizability—whether findings hold true over variations in people, conditions, and settings. Having a diverse sample of study participants in multiple sites would likely enhance the study's generalizability, and thus its external validity. The other answers would not necessarily be affected by a diverse sample of study participants in multiple sites.
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