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  • Validity
    • the truthfulness of the data, measures what it is supposed to
    • Internal
      • studies ability to test the hypothesis that it was designed to
      • Factors affecting
        • confounding variables
        • demand characteristics
        • experimental bias
    • External
      • how well the results of the study can be generalised beyond the study itself



Is the factor's affecting part meant only for internal validity or for external as well?

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