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Author : Tianqi Han
Release : 1993
Genre :
Kind : eBook
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Book Synopsis Comparison of IRT Observed-score Equating with Both IRT True- Score and Classical Equipercentile Equating by : Tianqi Han
Download or read book Comparison of IRT Observed-score Equating with Both IRT True- Score and Classical Equipercentile Equating written by Tianqi Han. This book was released on 1993. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frederic M. Lord
Release : 1983
Genre : Educational tests and measurements
Kind : eBook
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Book Synopsis Comparison of IRT Observed-score and True-score "equatings" by : Frederic M. Lord
Download or read book Comparison of IRT Observed-score and True-score "equatings" written by Frederic M. Lord. This book was released on 1983. Available in PDF, EPUB and Kindle. Book excerpt: Two methods of 'equating' tests using item response theory are compared, one using true scores, the other using estimated observed scores. On the data studied, they yield almost indistinguishable results. This is a reassuring result for users of IRT equating methods. (Author).
Author :
Release : 2007
Genre : Educational tests and measurements
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis A Comparison of Kernel Equating and IRT True Score Equating Methods by :
Download or read book A Comparison of Kernel Equating and IRT True Score Equating Methods written by . This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt: "This two-part study investigates 1) the impact of loglinear model selection in pre-smoothing observed score distributions on the kernel method of test equating and 2) the differences between kernel equating, chained equipercentile equating, and true score methods of concurrent calibration and Stocking and Lord's transformation method. Data were simulated to emulate realistic situations in which test difficulty differed, sample sizes varied, anchor test lengths were of varying lengths, and test lengths ranged from 20 items to 100 items. Difficulty of anchor tests were held constant. Because data were simulated in a single group (SG) format, traditional unsmoothed equipercentile equating was used as a criterion by which all other methods, which use the non-equivalent groups with an anchor test design (NEAT), were compared. Data were simulated using IceDog (ETS, 2007) and analyzed using KE software (ETS, 2007), MULTILOG (Thissen, 2003), IceDog (ETS, 2007), PARSCALE (Muraki & Bock, 2003) and Fortran programming code developed by the author. Results indicate the impact of equating technique chosen on examinees' test scores in a variety of realistic situations, and have further recommendations for further study."--Abstract from author supplied metadata.
Author : Juan Chen
Release : 2014
Genre : Educational tests and measurements
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Model Selection for IRT Equating of Testlet-based Tests in the Random Groups Design by : Juan Chen
Download or read book Model Selection for IRT Equating of Testlet-based Tests in the Random Groups Design written by Juan Chen. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: The traditional equipercentile equating method was used as the baseline for comparison in both real data and simulated data analyses. It was found in the study that both testlet length and the LID level affected the performance of the investigated models on IRT true and observed score equating of testlet-based tests. When the traditional 3PL IRT model was used for tests with long testlets, higher levels of local item dependence led to IRT equating results that deviated further away from those obtained from the baseline method. However, the effect of local item dependence on IRT equating results was not prominent for tests with short testlets. Moreover, for tests consisting of long testlets (e.g., a testlet length of 10 or more) and having a very low level of local item dependence (e.g., a LID level of 0.25 or lower), and for tests consisting of short testlets (e.g., a testlet length around 5), all four investigated IRT models worked well in IRT true and observed score equating. For tests with long testlets and a relatively high level of local item dependence (e.g., a LID level of 0.5625 or higher), the GRM, bifactor, and TRT models outperformed the traditional 3PL IRT model in IRT true and observed equating of testlet-based tests. The study suggested that the selection of models for IRT true and observed score equating of testlet-based tests should be considered with respect to the features of the testlet-based tests and the groups of examinees from which the data is collected. It is hoped that this study encourages researchers to identify differences among existing models for IRT true and observed score equating of testlet-based tests with various features, and to develop new models that are appropriate for modeling testlet-based tests to obtain accurate IRT number correct score equating results.
Author : Taehoon Kang
Release : 2009
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis An Alternative IRT Observed Score Equating Method. CRESST Report 751 by : Taehoon Kang
Download or read book An Alternative IRT Observed Score Equating Method. CRESST Report 751 written by Taehoon Kang. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: In this report, an alternative item response theory (IRT) observed score equating method was newly developed. The proposed equating method was illustrated with two real data sets and the equating results were compared to those of traditional IRT true score and IRT observed score equating methods. Using three loss indices, the new method appeared to produce equating equivalents more similar to those of the IRT observed score equating than those of the IRT true score equating. In addition to the conversion relationships between new form scores and their equating equivalents on the old form scale, the bootstrap standard errors of equating were provided and compared for the three IRT equating methods. These methods performed similarly. (Contains 5 figures and 3 tables.).
