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Showing 1 to 20 of 37 for “"polytomous"”.
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Assessing The Dimensionality of Polytomous Item Exams
… standardized tests contain both dichotomous and polytomous items, much of the work in dimensionality assessment has focused on the case of dichotomous item exams. The proposed method in this dissertation, Poly-NEWDIM (PND), demonstrates closer to nominal Type I error control and better power than …
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Restricted latent class models for polytomous attributes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Detecting Local Item Dependence in Polytomous Adaptive Data
… health-outcomes survey applications, often with polytomous items. In particular, there is interest in computer adaptive testing (CAT). Meeting model assumptions is necessary to realize the benefits of IRT in this setting, however. Although initial investigations of local item dependence (LID) …
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Item Selection Methods in Polytomous Computerized Adaptive Testing
… importance of administering adaptive tests with polytomous items is in great need. With regard to the applicability of adaptive testing using polytomous IRT models, adaptive testing can use polytomous items of either rating scales, or in some testing situations of multiple choice. Additionally, …
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Pseudo-likelihood estimation of multidimensional polytomous item response theory models
This Dissertation was approved for publication on 2016-06-24 at 13:03.
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Assessing the Differential Functioning of Items and Tests of a Polytomous Employee Attitude Survey
Dimensions of a polytomous employee attitude survey were examined for the presence of differential item functioning (DIF) and differential test functioning (DTF) utilizing Raju, van der Linden, & Fleer's (1995) differential functioning of items and tests (DFIT) framework. Comparisons were made …
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Dichotomous and polytomous item response model estimation using the marginal maximum likelihood and the EM algorithm
… fu addition to dichotomous models, several polytomous Item Response Models have been proposed, among which are the Partial Credit Model (Masters, 1982) and the Rating Scale Model (Andrich, 1978), belonging to the polytomous family of Rasch Models, and the Graded Response Model (Samejima, …
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Comparing the robustness of dimensionality assessment methods for polytomous data in the presence of careless responding
… methods: (a) parallel analysis (PA), (b) polytomous dimensionality evaluation to enumerate contributing traits (PolyDETECT), and (c) item factor analysis (IFA) when applied to polytomous data contaminated by CR. Both an applied analysis and a simulation study were conducted. In the applied …
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Item selection methods in multidimensional computerized adaptive testing adopting polytomously-scored items under multidimensional generalized partial credit model
… Computerized Adaptive Testing (MCAT) delivering polytomous items partially or completely in tests. Item selection methods examined include Fisher information based D-optimality (D-optimality), Kullback-Leibler information index (KI), mutual information (MI), and continuous entropy method (CEM). …
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New nonparametric statistical procedures for analyzing bias/DIF and dimensionality in item response data
… unidimensionality for mixed dichotomous and polytomous items. The modification is referred to Poly-DIMTEST. The new test statistic for polytomous item scoring was carefully developed and defended with an appropriate asymptotic theory. A simulation study then was carried out to investigate the …
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Generalized Linear Mixed Proficiency Models for Cognitive Diagnosis
… and GLMPM are generalized to allow for discrete-polytomous latent variables. Again, the effectiveness of the polytomous RUM and polytomous GLMPM is demonstrated in simulation studies. Finally, to demonstrate the usefulness of the GLMPM, all types of the proficiency space model are fit to two real …
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Ability Estimation Under Different Item Parameterization and Scoring Models
… data sets were submitted to seven dichotomous or polytomous IRT models with different item parameterization to estimate examinee ability. The accuracy of the ability estimation for a given IRT model was assessed by the recovery rate and the root mean square errors. The results indicated that …
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A Comparison of IRT and Rasch Procedures in a Mixed-Item Format Test
… scoring schema (proportion of dichotomous ad polytomous scoring) and item analysis model (IRT and Rasch) on the ability estimates, test information levels and optimization criteria of mixed item format tests. Polytomous item responses to 30 items for 1000 examinees were simulated using the …
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Examining the Equivalence of Rater Groups in 360-Degree Feedback for Use in Leadership Development
… feedback systems. The graded response model for polytomous items was used to assess differential functioning of items and tests and applied to an archival data set of 664 ratees to determine the equivalence of peer, subordinate, and supervisor ratings of four leadership competencies. The results …
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Loglinear Models as Item Response Models
… an extension of the Dutch Identity theorem to polytomous items and utilized it to develop the models that incorporate item covariates and person covariates. Noteworthy features of the models include both polytomous responses and multiple latent traits. Along with developing this new family of …
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Accuracy of Global Fit Indices as Indictors of Multidimensionality in Multidimensional Rasch Analysis
… independent variable. The second study analyzed polytomous data, with rating scale structure as an additional independent variable. The interaction effect between global fit index and between-dimension correlation had very large effect sizes in both studies. At higher values of between-dimension …
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Conditional, Structural and Unobserved Heterogeneity: three essays on preference heterogeneity in the design of financial incentives to increase weight loss program reach
… In this essay, we assess the ability of a polytomous attendance scale to ameliorate self-report unreliability. We find that the lowest point on the attendance scale corresponds best to non-attendance, attendance scales need be no longer than two or three points, and that the polytomous …
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Testing the Assumption of Sample Invariance of Item Difficulty Parameters in the Rasch Rating Scale Model
… that does not perfectly fit the Rasch model), polytomous scored data is used. The data used in this study comes from a university alumni questionnaire that was collected over a period of five years. The analysis tests for significant variation between (a) small samples taken from a larger …
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Comparison of three scoring procedures within context-dependent item sets
… with previous research in that only the polytomous scoring technique yielded inflated reliability estimates. In every comparison, number-right scoring and polyweighting were similar and outperformed the three-parameter IRT ability estimation model.
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Using Differential Item Functioning (Dif) Procedures for Investigating the Cross -Cultural Equivalence of Personality Tests
… items as DIF or non-DIF when dichotomizing polytomous items. In addition, LDFA seemed to perform more consistently across item types than SIBTEST. In summary, the results generally showed a small number of DIF items on each scale, except for scales A and N where about half of the items …
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