Results 211 to 220 of about 25,214 (257)
Some of the next articles are maybe not open access.
2019
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?? ???????????? ???????????????????? ???????????? ?????????????????????????? ?????????????? ?????????????????????????? ????????????????, ?????????????????? ???? ???????????????? ???????????????????? ?????????????????????????? ???????????? ?????? 800 ??????????????????????????????????????. ?????? ???????????????????? ???????? ?????????????????????? ?????
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Psychometrika, 2008
It is common practice in IRT to consider items as fixed and persons as random. Both, continuous and categorical person parameters are most often random variables, whereas for items only continuous parameters are used and they are commonly of the fixed type, although exceptions occur.
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It is common practice in IRT to consider items as fixed and persons as random. Both, continuous and categorical person parameters are most often random variables, whereas for items only continuous parameters are used and they are commonly of the fixed type, although exceptions occur.
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Educational Measurement: Issues and Practice, 1991
The purpose of this instructional module is to provide the basis for understanding the process of score equating through the use of item response theory (IRT). A context is provided for addressing the merits of IRT equating methods. The mechanics of IRT equating and the need to place parameter estimates from separate calibration runs on the same scale ...
Linda L. Cook, Daniel R. Eignor
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The purpose of this instructional module is to provide the basis for understanding the process of score equating through the use of item response theory (IRT). A context is provided for addressing the merits of IRT equating methods. The mechanics of IRT equating and the need to place parameter estimates from separate calibration runs on the same scale ...
Linda L. Cook, Daniel R. Eignor
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Applications of Multilevel IRT Modeling
School Effectiveness and School Improvement, 2004The recent development of multilevel IRT models (Fox & Glas, 2001, 2003) has been shown to be very useful for analyzing relationships between observed variables on different levels containing measurement error. Model parameter estimates and their standard deviations are concurrently estimated taking account of measurement error in observed ...
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Infrared telescope in space: IRTS
Space Science Reviews, 1995The IRTS is a first Japanese infrared satellite mission which will be launched on February of 1995 by HII rocket. The IRTS is one of the mission experiments aboard the small space platform, SFU. The telescope aperture of the IRTS is 15cm, but is cooled by liquid Helium to realize very low background condition.
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Approximations of Normal IRT Models for Change
Journal of Educational and Behavioral Statistics, 1999In this paper the one parameter Item Response Theory (IRT) model with normal Item Characteristic Curves (ICC) in longitudinal context has been studied. The abilities are structured according to a general mixed effects linear regression model. The items are supposed to be a sample from a large bank of items with constant mean difficulty.
Tan, E.S. +3 more
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Some Neglected Problems in IRT
Psychometrika, 1995The paper addresses three neglected questions from IRT. In section 1, the properties of the “measurement” of ability or trait parameters and item difficulty parameters in the Rasch model are discussed. It is shown that the solution to this problem is rather complex and depends both on general assumptions about properties of the item response functions ...
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1997
The extension of item response theory to data from more than one group of persons offers a unified approach to such problems as differential item functioning, item parameter drift, nonequivalent groups equating, vertical equating, two-stage testing, and matrix-sampled educational assessment.
R. Darrell Bock, Michele F. Zimowski
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The extension of item response theory to data from more than one group of persons offers a unified approach to such problems as differential item functioning, item parameter drift, nonequivalent groups equating, vertical equating, two-stage testing, and matrix-sampled educational assessment.
R. Darrell Bock, Michele F. Zimowski
openaire +1 more source