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Evaluate people on the basis of the value they add e. Summary-Test-Theory Gekoppeld aan het boek Psychological assessment and theory creating and using psychologica Show that a test measures the same thing as other tests used for the same purpose 2. Test previous learning 2. Gekoppeld aan het boek Psychological assessment and theory creating and using psychologica Network to develop a series of dynamic tools to reliably and validly measure patient-reported outcomes PROs Cost-utility analysis: Points that divide the frequency distribution into equal fourths 25 th percentile [Q1], median [Q2], 75th percentile [Q3] Interquartile range:

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The mere appearance that a measure has validity, if the items seem to be reasonably realted to the perceived purpose of the test Content validity:

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Correlate Predictor test scores X e. Two factors can account for most of the variance in both CPI and MMPI, which suggests that these tests are actually measuring only two unique concepts! SAT scores mean the same, even if different items were administered E. Compare test items success with e. Tried to retain strengths and eliminate weaknesses - Eliminated the age scale format, items with same content were placed together into any one of 15 separate tests to create point scales fifth edition: Need at least persons per item to estimate the parameters 7.

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