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Peer reviewedMcKinley, Robert L. – Journal of Educational Measurement, 1988
Six procedures for combining sets of item response theory (IRT) item parameter estimates from different samples were evaluated using real and simulated response data. Results support use of covariance matrix-weighted averaging and a procedure using sample-size-weighted averaging of estimated item characteristic curves at the center of the ability…
Descriptors: College Entrance Examinations, Comparative Analysis, Computer Simulation, Estimation (Mathematics)
Download full textMiller, Timothy R. – 1991
Two studies were carried out to evaluate the quality of multidimensional item response theory (MIRT) model parameter estimates obtained from the computer program NOHARM. The purpose of the first study was to compute empirical estimates of the standard errors of the parameters. In addition, the parameter estimates were evaluated for bias and the…
Descriptors: College Entrance Examinations, Comparative Analysis, Computer Simulation, Equations (Mathematics)
