Internal validity focuses on the rigor of the study, while external validity concentrates on generalizability.

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Internal validity refers to how well a study is conducted (its structure, control of variables, etc.), ensuring that the results are due to the manipulated variables and not other factors. External validity is about whether the study's findings can be applied to or generalized across other contexts, populations, or settings.

Internal Validity Focuses on the Rigor of the Study, While