Internal validity refers to the extent of generalizability of the results of a causal study to other settings.

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Internal validity refers to the extent to which the results of a study can be attributed to the manipulation of the independent variable rather than extraneous factors. External validity, on the other hand, refers to the extent to which the results of a study can be generalized to other settings or populations.

Internal Validity Refers to the Extent of Generalizability of the Results