ERIC Number: EJ649898
Record Type: Journal
Publication Date: 2002
Reference Count: N/A
A Comparison of Linking and Concurrent Calibration under the Graded Response Model.
Kim, Seock-Ho; Cohen, Allan S.
Applied Psychological Measurement, v26 n1 p25-41 Mar 2002
Compared two methods for developing a common metric for the graded response model under item response theory: (1) linking separate calibration runs using equating coefficients from the characteristic curve method; and (2) concurrent calibration using the combined data of the base and target groups. Concurrent calibration yielded consistently, although only slightly smaller, root mean square differences for item discrimination and location parameters. (SLD)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A