![]() Reliability refers to the repeatability of a test, as sound research must be replicable in order to be useful (Gordis, 2009). Validity is measured by sensitivity and specificity, that measure the tests rate of correctly identifying those who have or do not have the disease (Gordis, 2009). In epidemiological studies, validity of screenings and tests is defined as the “ability to distinguish between who has a disease and who does not" (Gordis, 2009, p. Highly credible research is built on the basis of controlling both internal and external validity, in order to generalize the study results to other similar populations (Cottrell & McKenzie, 2011). The study design, including sample size, methodology, and analyses must be carefully monitored to accurately assess the soundness of the results. In broad terms, validity and reliability are measures of accuracy in health education research. ![]() ![]() ![]() Empirically sound research includes data that is both valid and reliable. ![]()
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