Literaturnachweis - Detailanzeige
| Autor/inn/en | Hsu, Yaowen; Ackerman, Terry A.; Fan, Meichu |
|---|---|
| Institution | American Coll. Testing Program, Iowa City, IA. |
| Titel | The Relationship between the Bock-Aitkin Procedure and the EM Algorithm for IRT Model Estimation. |
| Quelle | (1999), (41 Seiten)
PDF als Volltext kostenfreie Datei |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Monographie |
| Schlagwörter | Equations (Mathematics); Estimation (Mathematics); Item Response Theory; Mathematical Models; Maximum Likelihood Statistics |
| Abstract | It has previously been shown that the Bock-Aitkin procedure (R. Bock and M. Aitkin, 1981) is an instance of the EM algorithm when trying to find the marginal maximum likelihood estimate for a discrete latent ability variable (latent trait). In this paper, it is shown that the Bock-Aitkin procedure is a numerical implementation of the EM algorithm for a continuous latent ability variable using numerical quadrature. Further, the relationship between the EM algorithm, marginal maximum likelihood estimation, and the Bock-Aitkin procedure is described for both the discrete and continuous cases. Some issues concerning the use of the Bock-Aitkin procedure and the EM algorithm are addressed. (Contains 31 references.) (SLD) |
| Anmerkungen | ACT Research Report Series, P.O. Box 168, Iowa City, IA 52243-0168. |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
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