ERIC Number: EJ381131
Record Type: Journal
Publication Date: 1988
Reference Count: N/A
A Comparison of Six Methods for Combining Multiple IRT Item Parameter Estimates.
McKinley, Robert L.
Journal of Educational Measurement, v25 n3 p233-46 Fall 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 distribution. (SLD)
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A