ERIC Number: EJ435122
Record Type: Journal
Publication Date: 1991
Reference Count: N/A
Maximum Marginal Likelihood Estimation for Semiparametric Item Analysis.
Ramsay, J. O.; Winsberg, S.
Psychometrika, v56 n3 p365-79 Sep 1991
A method is presented for estimating the item characteristic curve (ICC) using polynomial regression splines. Estimation of spline ICCs is described by maximizing the marginal likelihood formed by integrating ability over a beta prior distribution. Simulation results compare this approach with the joint estimation of ability and item parameters. (SLD)
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A