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The extent to which a set of operations, test, or other assessment measures what it is supposed to measure. Validity is not a property of a data set but refers to the appropriateness of inferences from test scores or other forms of assessment and the credibility of the interpretations that are made concerning the findings of a measurement effort.
For CAEP purposes, assessments that provide evidence of P-12 students’ intended educational outcomes as measured by standardized tests and other assessments. For CAEP purposes, VAM should demonstrate the change over time of intended educational outcomes that is attributable to teacher preparation programs.