Sampling Variances and Covariances of Parameter Estimates in Item Response Theory [microform] / Frederic M. Lord and Marilyn S. Wingersky
- Bib ID:
- 5419693
- Format:
- Book and Microform
- Author:
- Lord, Frederic M
- Online Version:
- https://eric.ed.gov/?id=ED223666
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- Description:
-
- [Washington, D.C.] : Distributed by ERIC Clearinghouse, 1982
- 51 p.
- Summary:
-
A possible method is developed for computing the asymptotic sampling variance-covariance matrix of joint maximum likelihood estimates in item response theory when both item parameters and abilities are unknown. For a set of artificial data, results are compared with empirical values and with the variance-covariance matrices found by the usual formulas for the case where the abilities are known, or where the item parameters are known. The results are consistent with the conjecture that the new method is asymptotically correct except for errors due to grouping. (Author/PN)
- Notes:
-
- Sponsoring Agency: Office of Naval Research, Arlington, VA. Personnel and Training Research Programs Office.
- Contract Number: N00014-80-C-0402.
- May also be available online. Address as at 14/8/18: https://eric.ed.gov/
- Reproduction:
- Microfiche. [Washington D.C.]: ERIC Clearinghouse microfiches : positive.
- Subject:
- Other authors/contributors:
- Available From:
- ERIC
- Copyright:
-
In Copyright
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Copyright status was determined using the following information:
- Material type:
- Literary Dramatic Musical
- Published status:
- Published
- Publication date:
- 1982
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