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• 14:28, 30 March 2025 Lawrence talk contribs created page Internal and external validity (Created page with "= Internal and external validity = Validity in clinical trials refers to the degree to which the results of a study are true, credible, and applicable. Two essential types of validity are: * '''Internal validity''': Are the observed effects in the study due to the intervention and not other factors? * '''External validity (generalizability)''': Can the study findings be applied to people, settings, or times beyond those studied? Both are critical to the scientific c...")