Transcription of Item Analysis - ed
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Item Analysis - ed
ByRichard J. McCowanSheila C. McCowanCenter for Development of Human ServicesResearch Foundation of SUNYS tate University College at Buffalo1695 Elmwood AvenueBuffalo, New York (Voice) (Fax)ItemAnalysisfor Criterion-Referenced Tests12 The Center for Development of Human Services is a continuing educationenterprise of the Research Foundation of the State University of New Yorkand a unit of the Graduate Studies and Research Divisionat Buffalo State College (SUNY).Funding is provided by the New York State Office of Childrenand Family Services. 1999 Research Foundation of SUNY/Center for Development of rights reservedCenter for Development of Human ServicesRobert N. Spaner - Chief Administrative J. McCowan, - Director, Research & Evaluation State College (SUNY)1695 Elmwood AvenueBuffalo, New York 14207-2407 Tel.: : Analysis uses statistics and expert judgment to evaluate testsbased on the quality of individual items, item sets, and entire setsof items, as well as the relationship of each item to other investigates the performance of items considered individuallyeither in relation to some external criterion or in relation to theremaining items on the test (Thompson & Levitov, 1985, p.)
correlation between an actual test score and the “true” criterion score. By the early 1950’s, other types of validity had been identi-fied (e.g., factorial, intrinsic, empirical, logical) (Anastasi, 1954). Messick (1989) expanded the definition by stating “Validity is an integrated evaluative judgment of the degree to which empirical
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