Estimating Item Parameters from Classical Indices for Item Pool Development with a Computerized Classification Test. ACT Research Report Series [microform] / Chi-Yu Huang, John C. Kalohn and Chuan-Ju Lin
- Bib ID:
- 5671204
- Format:
- Book and Microform
- Author:
- Huang, Chi-Yu
- Online Version:
- https://eric.ed.gov/?id=ED442801
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- Description:
-
- [Washington, D.C.] : Distributed by ERIC Clearinghouse, 2000
- 30 p.
- Summary:
-
Item pools supporting computer-based tests are not always completely calibrated. Occasionally, only a small subset of the items in the pool may have actual calibrations, while the remainder of the items may only have classical item statistics, (e.g., "p"-values, point-biserial correlation coefficients, or biserial correlation coefficients). Transformations can be applied to the classical statistics to obtain rough estimates of the item parameters from a three-parameter logistic item response model. These estimates, in turn, can be improved by linking them to items with actual calibrations from a program such as BILOG. The resulting item parameter estimates can then be used in a computerized classification test (CCT). An evaluation of the results of using such estimated parameters in simulated CCTs is presented in this paper. Seven simulated item pools were used. Results lead to the suggestion that when considering use of such augmented parameter estimates as those produced by the linking procedures in this paper, consideration be given to the sources of possible error and their effects on the outcomes of the test. (Contains 12 tables and 6 figures.) (SLD)
- Notes:
-
- Availability: ACT Research Report Series, P.O. Box 168, Iowa City, IA 52243-0168.
- ERIC Note: Portions of the paper presented at the Annual Meeting of the Psychometric Society (Lawrence, KS, 1999).
- May also be available online. Address as at 14/8/18: https://eric.ed.gov/
- Reproduction:
- Microfiche. [Washington D.C.]: ERIC Clearinghouse microfiches : positive.
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- ERIC
- Copyright:
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In Copyright
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- Material type:
- Literary Dramatic Musical
- Published status:
- Published
- Publication date:
- 2000
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