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Validity
Cautions related to use of the term "validity"" Validity refers to the appropriateness of the interpretation of the results of an assessment procedure for a given group of individuals, not to the procedure itself."
"Validity is a matter of degree; it does not exist on an all-or-none basis."
"Validity is always specific to some particular use or interpretation. No assessment is valid for all purposes."
"Validity is a unitary concept."
"Validity involves an overall evaluative judgment."
(Linn & Gronlund, 2000, pp. 75-76)From: Linn, R. L., & Gronlund, N. E. (2000). Measurement and assessment in teaching (8th ed.). Upper Saddle River, NJ: Merrill.
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