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Download full textvon Davier, Alina A.; Wilson, Christine – ETS Research Report Series, 2005
This paper discusses the assumptions required by the item response theory (IRT) true-score equating method (with Stocking & Lord, 1983; scaling approach), which is commonly used in the nonequivalent groups with an anchor data-collection design. More precisely, this paper investigates the assumptions made at each step by the IRT approach to…
Descriptors: Item Response Theory, True Scores, Equated Scores, Test Items
Hendrickson, Amy; Patterson, Brian; Melican, Gerald – College Board, 2008
Presented at the Annual National Council on Measurement in Education (NCME) in New York in March 2008. This presentation explores how different item weighting can affect the effective weights, validity coefficents and test reliability of composite scores among test takers.
Descriptors: Multiple Choice Tests, Test Format, Test Validity, Test Reliability
Morgan, Rick; Mazzeo, John – 1988
The dimensional structure of the 1987 Advanced Placement (AP) French language examination was tested in four populations using a series of confirmatory linear factor analysis models. To mitigate problems with the linear factor analysis of multiple choice items, the linear factor analysis of item parcel scores, made of small mutually exclusive…
Descriptors: Advanced Placement Programs, College Students, Comparative Analysis, Error of Measurement
