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Wang, Tianyou – 1996
In this paper, formulas for computing the weights that maximize the reliability of a test with multiple parts are derived using a congeneric model. A direct derivation for the three-part test and case and a two-step derivation for the n-part case are presented, and results for these two approaches are shown to be consistent for the three-part…
Descriptors: Computation, Equations (Mathematics), Matrices, Performance Based Assessment
Peer reviewed Peer reviewed
Wang, Tianyou; Kolen, Michael J.; Harris, Deborah J. – Journal of Educational Measurement, 2000
Describes procedures for calculating conditional standard error of measurement (CSEM) and reliability of scale scores and classification of consistency of performance levels. Applied these procedures to data from the American College Testing Program's Work Keys Writing Assessment with sample sizes of 7,097, 1,035, and 1,793. Results show that the…
Descriptors: Adults, Classification, Error of Measurement, Item Response Theory