A note on the geometric interpretation of the EM algorithm in estimating item characteristics and student abilities

Authors
Ip, EH Lalwani, N
Citation
Eh. Ip et N. Lalwani, A note on the geometric interpretation of the EM algorithm in estimating item characteristics and student abilities, PSYCHOMETRI, 65(4), 2000, pp. 533-537
Citations number
6
Categorie Soggetti
Psycology
Journal title
PSYCHOMETRIKA
ISSN journal
00333123 → ACNP
Volume
65
Issue
4
Year of publication
2000
Pages
533 - 537
Database
ISI
SICI code
0033-3123(200012)65:4<533:ANOTGI>2.0.ZU;2-H
Abstract
This note uses the EM-algorithm in an item response model as an illustratio n of a general method of parameter estimation, which geometrically can be d escribed as an alternating projection method.