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Chapter 8 Validity of Research Results

Chapter 8 Validity of Research Results. Three primary criteria for evaluating the quality of research results: Statistical Conclusion Validity Internal Validity External Validity. Statistical Conclusion Validity.

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Chapter 8 Validity of Research Results

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  1. Chapter 8 Validity of Research Results Three primary criteria for evaluating the quality of research results: Statistical Conclusion Validity Internal Validity External Validity

  2. Statistical Conclusion Validity • The extent to which statistical methods have been accurately applied and interpreted • Data handled properly • Correct statistics used • Statistics applied correctly • Results correctly interpreted

  3. Internal Validity • The extent to which study conclusions are justified • Can study conclusions be trusted? • Are there rival explanations for study results that are just as plausible as the researcher’s? • The extent to which confounding factors have been controlled

  4. External Validity • External validity is the degree to which the results of a study can be generalized to and across populations of persons, settings, times, outcomes, and treatment variations. • Depends primarily on how participants were selected

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