_______ validity is the extent to which results of one study can be generalized to other groups, whereas _______ validity is the extent to which changes in the independent variable caused changes in the dependent variable.

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External validity refers to the ability to generalize the results beyond the sample used in the study. Internal validity, on the other hand, refers to the extent to which the independent variable caused changes in the dependent variable, without the influence of extraneous variables. Construct validity refers to the degree to which a measure assesses what it claims to measure. Therefore, choice C best fits the provided definitions.

_______ Validity Is the Extent to Which Results of One